criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<n;i++)
long long inf=(long long)1E17;
#define i_7 (long long)(1E9+7)
long mod(long a){
    long long c=a%i_7;
    if(c>=0)return c;
    return c+i_7;
}

//typedef long long ll;
long long po(long a, long b){
    if(b==0){
        return 1;
    }
    
    long long z = po(a,b/2);
    z = mod(z*z);
    if(b%2!=0){
        z = mod(a*z);
    }
    return z;
}

//配列のSIZEは問題ごとに定義する必要がある。
const int SIZE=200010;
const int MOD=i_7;
long long inv[SIZE+1];//各iの逆元を格納する配列。
long long kai[SIZE+1];//i!のmodを格納する配列。
long long invkai[SIZE+1];//各i!の逆元を格納する配列。
void invinit(){//上の配列を初期化する関数。
    inv[1]=1;
    for(int i=2;i<=SIZE;i++){
        inv[i] = MOD - ((MOD/i)*inv[MOD%i])%MOD;
    }
    
    kai[0]=invkai[0]=1;
    for(int i=1;i<=SIZE;i++){
        kai[i]=(kai[i-1]*i)%MOD;
        invkai[i]=(invkai[i-1]*inv[i])%MOD;
    }
}

long long comb(long long a, long long b){
    if(b<0 || a<b){
        return 0;
    }
    return mod(kai[a]*mod(invkai[b]*invkai[a-b]));
}

int main(){
  int h,w,a,b;
  cin>>h>>w>>a>>b;
  long long ans=0;
  
  invinit();
  REP(i,h-a+1){
    ans += mod(comb(b+i,b)*comb(h-i+w-b));
  }
  cout<<ans<<endl;
  return 0;
}
  
  


Compiler output:
a.cc: In function 'int main()':
a.cc:53:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   53 |   cin>>h>>w>>a>>b;
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:58:32: error: too few arguments to function 'long long int comb(long long int, long long int)'
   58 |     ans += mod(comb(b+i,b)*comb(h-i+w-b));
      |                            ~~~~^~~~~~~~~
a.cc:44:11: note: declared here
   44 | long long comb(long long a, long long b){
      |           ^~~~
a.cc:60:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   60 |   cout<<ans<<endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:60:14: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   60 |   cout<<ans<<endl;
      |              ^~~~
      |              std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<string>
#include<cmath>
#include<cstdlib>
#include<stack>
#include<queue>
#define ll long long 
using namespace std;
const int maxn=1e5+7;
const int mod=1e9+7;
ll fac[maxn],inv_fac[maxn];
ll quick(ll a,ll n){
    ll res=1,t=a;
    while(n){
        if(n&1) res=(res*t)%mod;
        t=(t*t)%mod;
        n/=2;
    }
    return res;
}
void init(){
    fac[0]=1;
    for(int i=1;i<=maxn;i++) fac[i]=(fac[i-1]*i)%mod;
    //inv_fac[maxn]=quick(fac[maxn],mod-2);
    //for(int i=maxn-1;i>=0;i--) inv_fac[i]=(inv_fac[i+1]*(i+1))%mod;
    for(int i=0;i<=maxn;i++){
        inv_fac[i]=quick(fac[i],mod-2);
    }
}
ll C(int n,int m){
    if(n<0||m<0||m>n) return 0;
    if(m==0||m==n) return 1;
    return fac[n]*inv_fac[n-m]%mod*inv_fac[m]%mod;
}
int main(){
    init();
    //cout<<C(5,2)<<endl;
    int n,m,a,b;
    cin>>n>>m>>a>>b;
    ll ans=0;
    for(int i=b+1;i<=m1;i++) ans=(ans+(C(n-a-1+i-1,i-1)%mod*C(a-1+m-i,m-i)%mod)%mod)%mod;
    cout<<ans<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:44:22: error: 'm1' was not declared in this scope; did you mean 'm'?
   44 |     for(int i=b+1;i<=m1;i++) ans=(ans+(C(n-a-1+i-1,i-1)%mod*C(a-1+m-i,m-i)%mod)%mod)%mod;
      |                      ^~
      |                      m
Language: C++

#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int maxn=1e5+7;
const int mod=1e9+7;
ll fac[maxn],inv_fac[maxn];
ll quick(ll a,ll n){
    ll res=1,t=a;
    while(n){
        if(n&1) res=(res*t)%mod;
        t=(t*t)%mod;
        n/=2;
    }
    return res;
}
void init(){
    fac[0]=1;
    for(int i=1;i<=maxn;i++) fac[i]=(fac[i-1]*i)%mod;
    //inv_fac[maxn]=quick(fac[maxn],mod-2);
    //for(int i=maxn-1;i>=0;i--) inv_fac[i]=(inv_fac[i+1]*(i+1))%mod;
    for(int i=0;i<=maxn;i++){
        inv_fac[i]=quick(fac[i],mod-2);
    }
}
ll C(int n,int m){
    if(n<0||m<0||m>n) return 0;
    if(m==0||m==n) return 1;
    return fac[n]*inv_fac[n-m]%mod*inv_fac[m]%mod;
}
int main(){
    init();
    //cout<<C(5,2)<<endl;
    int n,m,a,b;
    cin>>n>>m>>a>>b;
    ll ans=0;
    for(int i=b+1;i<=m1;i++) ans=(ans+(C(n-a-1+i-1,i-1)%mod*C(a-1+m-i,m-i)%mod)%mod)%mod;
    cout<<ans<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:36:22: error: 'm1' was not declared in this scope; did you mean 'm'?
   36 |     for(int i=b+1;i<=m1;i++) ans=(ans+(C(n-a-1+i-1,i-1)%mod*C(a-1+m-i,m-i)%mod)%mod)%mod;
      |                      ^~
      |                      m
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for(int i = 0; i < n; i++)
#define REPR(i, n) for(int i = n - 1; i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i <= n; i++)
#define FORR(i, m, n) for(int i = m; i >= n; i--)
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());

using ll = long long;
using vll = vector<ll>;
using vvll = vector<vector<ll>>;
using P = pair<ll, ll>;

const ll MOD = 1e9+7;

//Thanks for @zaki_joho
//繰り返し二乗法:a^b O(log b)
template<typename T>
T mypow(T a, T b)
{
    if (b == 0)
        return 1;
    T tmp = mypow(a, b / 2);
    if (b % 2)
        return (((tmp * tmp) % MOD) * a) % MOD;
    else
        return (tmp * tmp) % MOD;
}

int main(){
    ll h, w, a, b;
    cin >> h >> w >> a >> b;

    //nCk mod Mの計算テーブルを構築
    vll pw(2 * 1e5 + 10), inv(2 * 1e5 + 10);
    pw[0] = 1, inv[0] = 1;
    REP(i, 2 * 1e5 + 5){
        pw[i + 1] = (pw[i] * (i + 1)) % MOD;
        inv[i + 1] = mypow(pw[i + 1], MOD - 2);
    }

    auto comb = [&] (ll n, ll k){
        if(n == k || k == 0) return 1;
        else return (((pw[n] * inv[k]) % MOD) * inv[n - k]) % MOD;
    };
    
    ll sum = comb(h + w - 2, h - 1);
    ll x = b, y = h - a + 1, p, q;
    while(1){
        if(y > h || x < 1) break;
        p = w - x + 1, q = h - y + 1;
        sum = (MOD + sum - comb(x + y - 2, x - 1) * comb(p + q - 2, p - 1)) % MOD;
        x--;
        y++;
    }
    cout << sum << endl;
    return 0;
}


Compiler output:
a.cc: In lambda function:
a.cc:45:61: error: inconsistent types 'int' and 'long long int' deduced for lambda return type
   45 |         else return (((pw[n] * inv[k]) % MOD) * inv[n - k]) % MOD;
      |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int MAX_N=2e5+20;
const int MOD = 1e9+7;
ll fact[MAX_N]; 
int H,W,A,B;

ll powmod(ll x, ll n)
{
	ll res=1;
	while(n){
		if(n&1) res = (res*x)%MOD;
		x = (x*x)%MOD;
		n >>=1;
	}
	return res;
}

ll C(ll n, ll m)
{
	ll a=fact[n];
	ll b=(fact[m]*fact[n-m])%MOD;
	return (a*powmod(b,MOD-2))%MOD;
}

void solve()
{
	fact[0]=1LL;
	for(ll i=1;i<N;++i) fact[i]=(fact[i-1]*i)%MOD;
	ll res = 0;
	for(ll i=B+1;i<=W;++i){
		ll cur=(C(i-1+H-A-1,H-A-1)*C(W-i+A-1, W-i))%MOD;
		res = (res + cur)%MOD;
	}
	cout << res << endl;
}

int main()
{
	cin >> H >> W >> A >> B;
	solve();
	return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:31:22: error: 'N' was not declared in this scope
   31 |         for(ll i=1;i<N;++i) fact[i]=(fact[i-1]*i)%MOD;
      |                      ^
Language: C++

#include <iostream>
#include <algorithm>

using namespace std;

const int MOD=1000*1000*1000+7;

vector<long long> facts;
vector<long long> fact_invs;
vector<long long> invs;

void comb_init(int n){
    facts=vector<long long>(n+1);
    fact_invs=vector<long long>(n+1);
    invs=vector<long long>(n+1);
    facts[0]=facts[1]=1;
    fact_invs[0]=fact_invs[1]=1;
    invs[1]=1;
    for(int i=2; i<=n; ++i){
        facts[i]=facts[i-1]*i%MOD;
        invs[i]=MOD-invs[MOD%i]*(MOD/i)%MOD;
        fact_invs[i]=fact_invs[i-1]*invs[i]%MOD;
    }
}

long long comb(long long n, long long k){
    return facts[n]*(fact_invs[k]*fact_invs[n-k]%MOD)%MOD;
}

long long f(long long h, long long w){
    return comb(h+w-2, w-1);
}

int main(){
    int h, w, a, b; cin >> h >> w >> a >> b;
    comb_init(h+w);
    long long ans=f(h, w);
    for(int i=0; i<b; ++i){
        long long removed=f(a, w-b+i+1);
        long long times=f(h-a, b-i);
        ans=ans-(removed*times%MOD);
        if(ans<0) ans+=MOD;
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc:8:1: error: 'vector' does not name a type
    8 | vector<long long> facts;
      | ^~~~~~
a.cc:9:1: error: 'vector' does not name a type
    9 | vector<long long> fact_invs;
      | ^~~~~~
a.cc:10:1: error: 'vector' does not name a type
   10 | vector<long long> invs;
      | ^~~~~~
a.cc: In function 'void comb_init(int)':
a.cc:13:5: error: 'facts' was not declared in this scope
   13 |     facts=vector<long long>(n+1);
      |     ^~~~~
a.cc:13:11: error: 'vector' was not declared in this scope
   13 |     facts=vector<long long>(n+1);
      |           ^~~~~~
a.cc:3:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    2 | #include <algorithm>
  +++ |+#include <vector>
    3 | 
a.cc:13:18: error: expected primary-expression before 'long'
   13 |     facts=vector<long long>(n+1);
      |                  ^~~~
a.cc:14:5: error: 'fact_invs' was not declared in this scope
   14 |     fact_invs=vector<long long>(n+1);
      |     ^~~~~~~~~
a.cc:14:22: error: expected primary-expression before 'long'
   14 |     fact_invs=vector<long long>(n+1);
      |                      ^~~~
a.cc:15:5: error: 'invs' was not declared in this scope
   15 |     invs=vector<long long>(n+1);
      |     ^~~~
a.cc:15:17: error: expected primary-expression before 'long'
   15 |     invs=vector<long long>(n+1);
      |                 ^~~~
a.cc: In function 'long long int comb(long long int, long long int)':
a.cc:27:12: error: 'facts' was not declared in this scope
   27 |     return facts[n]*(fact_invs[k]*fact_invs[n-k]%MOD)%MOD;
      |            ^~~~~
a.cc:27:22: error: 'fact_invs' was not declared in this scope
   27 |     return facts[n]*(fact_invs[k]*fact_invs[n-k]%MOD)%MOD;
      |                      ^~~~~~~~~
Language: C

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define rep(i,n) for(int i=0;i<n;i++)
#define mod 1000000007
int kaijo(int n){
	int ans=1;
	for(int i=2;i<=n;i++){
		ans*=i;
		ans%=mod;
	}
	return ans;
}
int modpow(int a,int b){
	if(b==0)return 1;
	if(b%2)return modpow(a,b-1)*a%mod;
	return modpow(a,b/2)*modpow(a,b/2)%mod;
}
int h,w,a,b,k[200010],ans;
int comb(int x,int y){
	if(y==0)return 1;
	return k[x]*modpow(k[x-y],mod-2)%mod*modpow(k[y],mod-2)%mod;
}
signed main(){
	cin>>h>>w>>a>>b;
	k[0]=1;
	for(int i=1;i<=h+w;i++){
		k[i]=k[i-1]*i;
		k[i]%=mod;
	}
	for(int i=b;i<w;i++){
		ans+=comb(i+h-a-1,i)*(comb(w-i-1+a-1,w-i-1)+mod)%mod;
		ans%=mod;
	}
	cout<<ans<<endl;
	return 0;
}


Compiler output:
main.c:1:10: fatal error: bits/stdc++.h: No such file or directory
    1 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#pragma comment(linker, "/stack:20000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
 
#include<bits/stdc++.h>
/*#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#include<ext/pb_ds/detail/standard_policies.hpp>*/
 
#define sz(s) (int)(s.size())
#define all(s) s.begin(), s.end()
#define rep(a, b, c) for(int a = b; a <= c; ++a)
#define per(a, b, c) for(int a = b; a >= c; --a)
#define _ ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define int unsigned long long
 
using namespace std;
//using namespace __gnu_pbds;
 
typedef unsigned long long ull;
typedef long long ll;
/*typedef tree<pair<int, int>, 
null_type, less<pair<int, int>>, 
rb_tree_tag, tree_order_statistics_node_update>
ordered_set;*/
//find_by_order() order_of_key()
 
const double eps = 1e-7;
const int mod = 1e9+7, MXN = 5e5+17;
const int dx[] = {0,0,1,-1}, dy[] = {1,-1,0,0};
 
template<typename T>inline bool updmin(T &a, const T &b) {return a > b ? a = b,1 : 0;}
template<typename T>inline bool updmax(T &a, const T &b) {return a < b ? a = b,1 : 0;}
 
int h, w, a, b;
int f[MXN], res;

inline int Add(int a, int b) {
	a += b;
	if(a > mod) a -= mod;
	if(a < mod) a += mod;
	return a;
}

inline int Mul(int a, int b) {
	return (a*1ll*b)%mod;
}

inline int Pow(int a, int b) {
	int res = 1;
	while(b) {
		if(b&1) res = Mul(res,a);
		b >>= 1;
		a = Mul(a,a);
	}
	return res;
}

inline int Div(int a, int b) {
	return Mul(a,Pow(b,mod-2));
}

inline int Cnk(int n, int k) {
	return Div(f[n],Mul(f[k],f[n-k]));
}
 
int32_t main() { _
#ifdef DanQQQQQ
	freopen(".in","r",stdin);
	freopen(".out","w",stdout);
#endif
	cin >> h >> w >> a >> b;
	f[0] = 1;
	rep(i,1,200050) f[i] = Mul(f[i-1],i);
	rep(i,0,b-1) res = Add(res,Mul(Cnk(h-a+i-1,i),Cnk(w+a-i-2,a-1)));
	cout << Add(Cnk(h+w-2,w-1),-res) << endl;
	return 0;
}

Compiler output:
a.cc:30:25: error: narrowing conversion of '-1' from 'int' to 'long long unsigned int' [-Wnarrowing]
   30 | const int dx[] = {0,0,1,-1}, dy[] = {1,-1,0,0};
      |                         ^~
a.cc:30:40: error: narrowing conversion of '-1' from 'int' to 'long long unsigned int' [-Wnarrowing]
   30 | const int dx[] = {0,0,1,-1}, dy[] = {1,-1,0,0};
      |                                        ^~
Language: C++

#include <bits/stdc++.h>
#define FOR(i, begin, end) for(int i=(begin);i<(end);i++)
#define REP(i, n) FOR(i,0,n)
#define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--)
#define IREP(i, n) IFOR(i,0,n)
#define SORT(a) sort(a.begin(), a.end())
#define REVERSE(a) reverse(a.begin(), a.end())
#define int long long
#define INF 1000000000000000
using namespace std;

typedef vector<int> vec;
typedef vector<vec> mat;
typedef pair<int, int> Pii;

template<typename T>
void readvec(vector<T> &a);
void readindex(vector<int> &a);

int fastpow(int x, int n, int m){
    int a = 1;
    IREP(i, 64){
        a = (a * a) % m;
        if(((n >> i) & 1) == 1) a = (a * x) % m;
    }
    return a;
}

class Combination
{
public:

    vec fact, invfact;
    int MAX_N, mod;

    Combination(int MAX_N, int mod): MAX_N(MAX_N), mod(mod) {
        fact = vec(MAX_N + 1);
        invfact = vec(MAX_N + 1);
        fact[0] = 1;
        FOR(i, 1, MAX_N + 1){
            fact[i] = (fact[i - 1] * i) % mod;
        }
        invfact[MAX_N] = fastpow(fact[MAX_N], mod - 2, mod);
        IREP(MAX_N, 0){
            invfact[i] = (invfact[i + 1] * (i + 1)) % mod;
        }
    }

    int comb(int n, int r){
        if(r > n || r < 0 || n < 0) return 0;
        int a = fact[n];
        a = (a * invfact[r]) % mod;
        a = (a * invfact[n - r]) % mod;
        return a;
    }
};

signed main(){

    int H, W, A, B; cin >> H >> W >> A >> B;
    int mod = 1000000007;

    Combination C(H + W, mod);
    
    int ans = C.comb(H + W - 2, W - 1);

    REP(i, B){
        int tmp = C.comb(i + H - A - 1, i) * C.comb(W + A - i - 2, W - i - 1);
        tmp %= mod;
        ans = (ans + (mod - tmp)) % mod;
    }

    cout << ans;
    
    return 0;
}


template<typename T>
void readvec(vector<T> &a){
    REP(i, a.size()){
        cin >> a[i];
    }
}
void readindex(vector<int> &a){
    REP(i, a.size()){
        cin >> a[i];
        a[i]--;
    }
}

Compiler output:
a.cc: In constructor 'Combination::Combination(long long int, long long int)':
a.cc:45:21: error: 'i' was not declared in this scope
   45 |             invfact[i] = (invfact[i + 1] * (i + 1)) % mod;
      |                     ^
Language: C++

#include<bits/stdc++.h>

#define REP(i,s,n) for(int i=s;i<n;++i)
#define rep(i,n) REP(i,0,n)
#define ALL(x) x.begin(),x.end()
#define EPS (1e-8)
#define equals(a,b) (fabs((a)-(b))<EPS)

using namespace std;

typedef long long ll;
const int IINF = INT_MAX;
const ll LLINF = LLONG_MAX;

inline bool LT(double a,double b) { return !equals(a,b) && a < b; }
inline bool LTE(double a,double b) { return equals(a,b) || a < b; }

const ll mod = 1000000007LL;

long long extgcd(long long a,long long b,long long& x,long long& y) {
  long long d = a;
  if(b != 0) {
    d = extgcd(b,a%b,y,x);
    y -= (a/b)*x;
  }
  else
    x = 1,y = 0;
  return d;
}

long long mod_inv(long long a,long long m) {
  long long x,y;
  extgcd(a,m,x,y);
  return (m+x%m)%m;
}


ll H,W,A,B;
#define MAX 1001０000
ll fact[MAX];

void compute() {

}

int main() {
  fact[0] = 1;
  REP(i,1,MAX) fact[i] = ( fact[i-1] * (ll)i ) % mod;
  cin >> H >> W >> A >> B;
  ll ans = 0;
  ll x = B-1;
  for(ll y=0;y<H-A;++y) {
    ll v1 = 0;
    v1 = fact[x + y];
    v1 = ( v1 * mod_inv(fact[x],mod) ) % mod;
    v1 = ( v1 * mod_inv(fact[y],mod) ) % mod;
    //if( x <= 0 || y <= 0 ) v1 = 1;
    ll v2 = 0;
    ll rx = W - ( x + 1 ) - 1;
    ll ry = H - y - 1;
    v2 = fact[rx+ry];
    if( rx ) v2 = ( v2 * mod_inv(fact[rx],mod) ) % mod;
    if( ry ) v2 = ( v2 * mod_inv(fact[ry],mod) ) % mod;
    //if( rx <= 0 || ry <= 0 ) v2 = 1;
    ( ans += ( v1 * v2 ) % mod ) %= mod;
  }
  cout << ans % mod << endl;
  compute();
  return 0;
}


Compiler output:
a.cc:39:13: error: unable to find numeric literal operator 'operator""\U0000ff10000'
   39 | #define MAX 1001０000
      |             ^~~~~~~~~
a.cc:40:9: note: in expansion of macro 'MAX'
   40 | ll fact[MAX];
      |         ^~~
a.cc: In function 'int main()':
a.cc:47:3: error: 'fact' was not declared in this scope
   47 |   fact[0] = 1;
      |   ^~~~
a.cc:39:13: error: unable to find numeric literal operator 'operator""\U0000ff10000'
   39 | #define MAX 1001０000
      |             ^~~~~~~~~
a.cc:3:34: note: in definition of macro 'REP'
    3 | #define REP(i,s,n) for(int i=s;i<n;++i)
      |                                  ^
a.cc:48:11: note: in expansion of macro 'MAX'
   48 |   REP(i,1,MAX) fact[i] = ( fact[i-1] * (ll)i ) % mod;
      |           ^~~
Language: C++

#include <iostream>
 2 #include <algorithm>
 3 #include <cstring>
 4 #include <cstdio>
 5 #include <vector>
 6 #include <cstdlib>
 7 #include <iomanip>
 8 #include <cmath>
 9 #include <ctime>
#include <map>
#include <set>
#include <queue>
using namespace std;
#define lowbit(x) (x&(-x))
#define max(x,y) (x>y?x:y)
#define min(x,y) (x<y?x:y)
#define MAX 100000000000000000
#define MOD 1000000007
#define pi acos(-1.0)
#define ei exp(1)
#define PI 3.141592653589793238462
#define INF 0x3f3f3f3f3f
#define mem(a) (memset(a,0,sizeof(a)))
typedef long long ll;
ll gcd(ll a,ll b){
    return b?gcd(b,a%b):a;
}
bool cmp(int x,int y)
{
    return x>y;
}
const int N=2e5+20;
const ll mod=1e9+7;
ll f[N],n,m,A,B;
ll powmod(ll x,ll n)
{
    ll s=1;
    while(n){
        if(n&1)
            s=(s*x)%mod;
        x=(x*x)%mod;
        n>>=1;
    }
    return s;
}
ll C(ll n,ll m)
{
    ll a=f[n];
    ll b=(f[m]*f[n-m])%mod;
    return (a*powmod(b,mod-2))%mod;
}
int main()
{
    f[0]=1;
    for(ll i=1;i<N;i++)
        f[i]=(f[i-1]*i)%mod;
    while(cin>>n>>m>>A>>B){
        ll res=0;
        for(ll i=B+1;i<=m;i++){
            ll tmp=(C(i-1+n-A-1,n-A-1)*C(m-i+A-1,m-i))%mod;
            res=(res+tmp)%mod;
        }
        cout<<res<<endl;
    }
    return 0;
}

Compiler output:
a.cc:2:4: error: stray '#' in program
    2 |  2 #include <algorithm>
      |    ^
a.cc:3:4: error: stray '#' in program
    3 |  3 #include <cstring>
      |    ^
a.cc:4:4: error: stray '#' in program
    4 |  4 #include <cstdio>
      |    ^
a.cc:5:4: error: stray '#' in program
    5 |  5 #include <vector>
      |    ^
a.cc:6:4: error: stray '#' in program
    6 |  6 #include <cstdlib>
      |    ^
a.cc:7:4: error: stray '#' in program
    7 |  7 #include <iomanip>
      |    ^
a.cc:8:4: error: stray '#' in program
    8 |  8 #include <cmath>
      |    ^
a.cc:9:4: error: stray '#' in program
    9 |  9 #include <ctime>
      |    ^
a.cc:2:2: error: expected unqualified-id before numeric constant
    2 |  2 #include <algorithm>
      |  ^
In file included from /usr/include/c++/14/map:62,
                 from a.cc:10:
/usr/include/c++/14/bits/stl_tree.h:227:18: error: '__aligned_membuf' in namespace '__gnu_cxx' does not name a template type
  227 |       __gnu_cxx::__aligned_membuf<_Val> _M_storage;
      |                  ^~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_tree.h: In member function '_Val* std::_Rb_tree_node<_Val>::_M_valptr()':
/usr/include/c++/14/bits/stl_tree.h:231:16: error: '_M_storage' was not declared in this scope
  231 |       { return _M_storage._M_ptr(); }
      |                ^~~~~~~~~~
/usr/include/c++/14/bits/stl_tree.h: In member function 'const _Val* std::_Rb_tree_node<_Val>::_M_valptr() const':
/usr/include/c++/14/bits/stl_tree.h:235:16: error: '_M_storage' was not declared in this scope
  235 |       { return _M_storage._M_ptr(); }
      |                ^~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;

long long mod=1e9+7;
long long fact[100010];
long long poww(long long x,long long n)
{
    if(n==0) return 1;
    else if(n%2==0) return poww(x,n/2) * poww(x,n/2) % mod;
    else if(n%2==1) return poww(x,n/2) * poww(x,n/2) % mod * x % mod;
}
long long C(long long k,long long n)
{
    return fact[n] * poww(fact[k],mod-2) % mod * poww(fact[n-k],mod-2) % mod;
}
long long main()
{
    long long h,w,a,b;
    cin >> h >> w >> a >> b;
    fact[0]=1;
    for(long long i=1;i<=100000;i++)
    {
        fact[i]=fact[i-1]*i;
        fact[i]=fact[i] % mod;
    }
    //cout << C(3,5);
    long long ans=0;
    for(long long i=1;i<=w-b;i++)
    {
        ans=ans+C(h-a-1,h-a+b+i-2)*C(a-1,a+w-b-i-1)%mod;
        ans=ans%mod;
    }
    cout << ans << "\n";
}


Compiler output:
cc1plus: error: '::main' must return 'int'
a.cc: In function 'long long int poww(long long int, long long int)':
a.cc:11:1: warning: control reaches end of non-void function [-Wreturn-type]
   11 | }
      | ^
Language: C++

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <iostream>
#include <algorithm>
#include <string>
#include <vector>

using namespace std;

int comb(long long int n, long long int k);

int main(){
    int h,w,a,b;
    long long int ans;
    cin >> h >> w >> a >> b;
    ans = comb(h,w) - comb(a,b);
    cout << ans % 1000000007 << endl;
}

int comb(int n, int k){
    if(k == 1 || k == n){
        return 1;
    }else{
        return comb(n-1,k) + comb(n-1, k-1);
    }
}

Compiler output:
/usr/bin/ld: /tmp/ccWiTXGU.o: in function `main':
a.cc:(.text+0x67): undefined reference to `comb(long long, long long)'
/usr/bin/ld: a.cc:(.text+0x7f): undefined reference to `comb(long long, long long)'
collect2: error: ld returned 1 exit status
Language: C++

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> P;
typedef pair<ll,P>  PP;
typedef vector<ll> Vector;
typedef vector<Vector> DVector;
typedef priority_queue<PP, vector<PP>, greater<PP>> PPQueue;

#define fi          first
#define se          second
#define sfi         se.fi
#define sse         se.se
#define pb          push_back
#define INF         INT_MAX
#define MOD         1000000007
#define bcnt        __builtin_popcount
#define all(x)      (x).begin(),(x).end()
#define uni(x)      x.erase(unique(all(x)),x.end())
#define ub(x,y)     (upper_bound(all(x),y)-x.begin())
#define lb(x,y)     (lower_bound(all(x),y)-x.begin())
#define rep(i,n)    repl(i,0,n-1)
#define usort(x)    sort(all(x))
#define dsort(x)    sort(all(x),greater<ll>())
#define mkp(x,y)    make_pair(x,y)
#define mmax(x,y)   (x>y?x:y)
#define mmin(x,y)   (x<y?x:y)
#define maxch(x,y)  x=mmax(x,y)
#define minch(x,y)  x=mmin(x,y)
#define exist(x,y)  (find(all(x),y)!=x.end())
#define each(itr,v) for(auto itr:v)
#define repl(i,a,b) for(ll i=(ll)(a);i<=(ll)(b);i++)
DVector dp;
ll h,w,a,b;
//// 階乗(mod p)

ll fact[2e5];
void mod_fact(ll n,ll p){
  fact[0]=1;
  for(ll i=1;i<=n;i++)fact[i]=(fact[i-1]*i)%p;
}
//// 冪乗(mod p)
//// xの逆元 mod_pow(x,p-2,p)
ll mod_pow(ll x,ll n,ll p){
  ll res=1;
  while(n>0){
    if(n&1)res=res*x%p;
    x=x*x%p;
    n>>=1;
  }
  return res;
}

//// コンビネーション(mod p)
ll mod_comb(ll n,ll k,ll p){
  if(n<0||k<0||n<k)return 0;
  return ((fact[n]*mod_pow(fact[k],p-2,p))%p)*mod_pow(fact[n-k],p-2,p)%p;
}

int main(){
  cin.sync_with_stdio(false);
  cin >> h >> w >> a >> b;
  ll ans = 0;
  mod_fact(2e5,MOD);
  rep(i,min(h - a, w - b)){
    ans += mod_comb(h - a + b - 1, b + i,MOD) * mod_comb(w - b + a - 1, a + i,MOD);
    ans %= MOD;
  }
  cout << ans << endl;
}


Compiler output:
a.cc:39:9: error: conversion from 'double' to 'long unsigned int' in a converted constant expression
   39 | ll fact[2e5];
      |         ^~~
a.cc:39:9: error: could not convert '2.0e+5' from 'double' to 'long unsigned int'
   39 | ll fact[2e5];
      |         ^~~
      |         |
      |         double
a.cc:39:9: error: size of array 'fact' has non-integral type 'double'
Language: C++


#include <stdio.h>
#include <iostream>
#include <string.h>
#include <string>
#include <algorithm>
#include <queue>
#include <map>
#define INF 999999
using namespace std;

int maing()
{
	queue<pair<int, int> > qu;
	int h, w, a, b, ans = 0;
	cin >> h >> w >> a >> b;
	qu.push(make_pair(1, 1));
	while (!qu.empty())
	{
		pair<int, int> pa;
		pa = qu.front();
		qu.pop();
		if (pa.first == h&&pa.second == w) ans++;
		if (pa.first < h - a && pa.second <= b || pa.first<h && pa.second>b) qu.push(make_pair(pa.first + 1, pa.second));
		if (pa.second < w) qu.push(make_pair(pa.first, pa.second + 1));
	}
	cout << ans << endl;

	return 0;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

// 0529.cpp : 定义控制台应用程序的入口点。
//
#ifndef ONLINE_JUDGE
#define _CRT_SECURE_NO_WARNINGS
#define gets(str) gets_s(str)
#endif

#include <stdio.h>
#include <iostream>
#include <string.h>
#include <string>
#include <algorithm>
#include <queue>
#include <map>
#define INF 999999
using namespace std;

int maing()
{
	queue<pair<int, int> > qu;
	int h, w, a, b, ans = 0;
	cin >> h >> w >> a >> b;
	qu.push(make_pair(1, 1));
	while (!qu.empty())
	{
		pair<int, int> pa;
		pa = qu.front();
		qu.pop();
		if (pa.first == h&&pa.second == w) ans++;
		if (pa.first < h - a && pa.second <= b || pa.first<h && pa.second>b) qu.push(make_pair(pa.first + 1, pa.second));
		if (pa.second < w) qu.push(make_pair(pa.first, pa.second + 1));
	}
	cout << ans << endl;

#ifndef ONLINE_JUDGE
	printf("\n");
	system("pause");
#endif
	return 0;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include <bits/stdc++.h>
/* Karen {{{
  ___  ____
 |_  ||_  _|
   | |_/ /    ,--.   _ .--.  .---.  _ .--.
   |  __'.   `'_\ : [ `/'`\]/ /__\\[ `.-. |
  _| |  \ \_ // | |, | |    | \__., | | | |
 |____||____|\'-;__/[___]    '.__.'[___||__]
}}} */
/* cpp template {{{*/
using namespace std;

#define endl '\n'

#define REP(i, n) for (int i = 0; i < (n); i++)
#define REPS(i, a, n) for (int i = (a); i < (n); i++)
#define RREP(i, n) for (int i = 1; i <= (n); i++)
#define X real()
#define Y imag()
#define EQ(n,m) (abs((n)-(m)) < EPS)

typedef double D;
typedef long long ll;
typedef long double lb;
typedef complex<D> P;
typedef vector<P> VP;
typedef vector<int> vi;
typedef vector<vector<int> > vii;
typedef pair<int, int> pii;
typedef pair<int, string> pis;
typedef pair<string, int> psi;

inline bool inside(int y,int x,int H,int W){return(y>=0&&x>=0&&y<H&&x<W);}
inline int in() {int x; std::cin >> x; return x;}

template <typename T>
void print(std::vector<T>& v, char c = ' ') {
  REP(i, v.size()) {
    if (i != 0) std::cout << c;
    std::cout << v[i];
  }
  std::cout << endl;
}
template <typename T>
void print(T x) {
  std::cout << x << '\n';
}
/* }}} */
/* 定数 {{{*/
const ll MOD = 1e9 + 7;
const ll INF = 1e9 + 9;
const D EPS  = 1e-9;
const int dx[] = {0, 1, 0, -1, 1, -1, 1, -1};
const int dy[] = {1, 0, -1, 0, 1, -1, -1, 1};
/* }}} */

int f[100000][100000] = {1};

int dp(int h, int w, int a, int b)
{
  if (h < a || w < b) return 0;
  if(f[h][w] == 0){
    f[h][w] = dp(h - 1, w, a, b) + dp(h, w - 1, a, b);
  }
  return f[h][w];
}

signed main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);

  int H = in(), W = in(), A = in(), B = in();
  int sum = 0;
  for (int i = H - A - 1, j = W - B - 1; j < W; j++){
    sum += (dp(i, j, 0, 0) % INF + dp(i + 1, j + 1, H - 1, W - 1)) % INF;
  }

  cout << sum;

  return (0);
}



Compiler output:
g++: internal compiler error: File size limit exceeded signal terminated program as
Please submit a full bug report, with preprocessed source (by using -freport-bug).
See <file:///usr/share/doc/gcc-14/README.Bugs> for instructions.
Language: C++

#include <vector>
#include <iostream>
#define MOD 1000000007
using namespace std;
long long fast_pow(long long Base, long long n, long long M){
	if (n == 0)	return 1;
	if (n == 1)	return Base;
	long long  halfn = fast_pow(Base, n / 2, M);
	long long ans;
	if (n % 2 == 0)	{ ans = long long(halfn * halfn) % M; }
	else { ans = long long(((halfn * halfn) % M)*Base) % M; }
	return ans;
}
long long findMMI(int n){
	return fast_pow(n, MOD - 2, MOD);
}
long long  nCr(long long n, long long r, const vector<long long>& modFact){
	long long ans;
	long long numerator = modFact[n];
	long long denominator = long long(modFact[r] * modFact[n - r]) % MOD;
	long long denMMI = findMMI(denominator);
	ans = (numerator * denMMI) % MOD;
	return ans;
}
int main()
{
	int h, w, a, b;
	cin >> h >> w >> a >> b;
	vector<long long> modFact = { 1 };
	for (int i = 1; i <= w + h; ++i){
		modFact.push_back (long long(modFact.back()*i)%MOD);
	}
	long long ans = 0;
	for (int t = 1; t <= h - a; ++t){
		long long first = nCr(b + t - 2, b - 1, modFact);
		long long second = nCr(w - b + h - t - 1, w - b - 1, modFact);
		long long fcs = (first*second)%MOD;
		ans +=fcs;
		ans %= MOD;
	}
	cout << ans << endl;
	cin >> a;
	return 0;
}



Compiler output:
a.cc: In function 'long long int fast_pow(long long int, long long int, long long int)':
a.cc:10:33: error: expected primary-expression before 'long'
   10 |         if (n % 2 == 0) { ans = long long(halfn * halfn) % M; }
      |                                 ^~~~
a.cc:11:22: error: expected primary-expression before 'long'
   11 |         else { ans = long long(((halfn * halfn) % M)*Base) % M; }
      |                      ^~~~
a.cc: In function 'long long int nCr(long long int, long long int, const std::vector<long long int>&)':
a.cc:20:33: error: expected primary-expression before 'long'
   20 |         long long denominator = long long(modFact[r] * modFact[n - r]) % MOD;
      |                                 ^~~~
a.cc: In function 'int main()':
a.cc:31:36: error: expected primary-expression before 'long'
   31 |                 modFact.push_back (long long(modFact.back()*i)%MOD);
      |                                    ^~~~
Language: C++

#include <vector>
#include <iostream>
#define MOD 1000000007
using namespace std;
long long fast_pow(long long Base, long long n, long long M){
	if (n == 0)	return 1;
	if (n == 1)	return Base;
	long long  halfn = fast_pow(Base, n / 2, M);
	long long ans;
	if (n % 2 == 0)	ans= long long(halfn * halfn) % M;
	else ans= long long (((halfn * halfn) % M)*Base) % M;
	return ans;
}
long long findMMI(int n){
	return fast_pow(n, MOD - 2, MOD);
}
long long  nCr(long long n, long long r, const vector<long long>& modFact){
	long long ans;
	long long numerator = modFact[n];
	long long denominator = long long(modFact[r] * modFact[n - r]) % MOD;
	long long denMMI = findMMI(denominator);
	ans = (numerator * denMMI) % MOD;
	return ans;
}
int main()
{
	int h, w, a, b;
	cin >> h >> w >> a >> b;
	vector<long long> modFact = { 1 };
	for (int i = 1; i <= w + h; ++i){
		modFact.push_back (long long(modFact.back()*i)%MOD);
	}
	long long ans = 0;
	for (int t = 1; t <= h - a; ++t){
		long long first = nCr(b + t - 2, b - 1, modFact);
		long long second = nCr(w - b + h - t - 1, w - b - 1, modFact);
		long long fcs = (first*second)%MOD;
		ans +=fcs;
		ans %= MOD;
	}
	cout << ans << endl;
	cin >> a;
	return 0;
}

Compiler output:
a.cc: In function 'long long int fast_pow(long long int, long long int, long long int)':
a.cc:10:30: error: expected primary-expression before 'long'
   10 |         if (n % 2 == 0) ans= long long(halfn * halfn) % M;
      |                              ^~~~
a.cc:11:19: error: expected primary-expression before 'long'
   11 |         else ans= long long (((halfn * halfn) % M)*Base) % M;
      |                   ^~~~
a.cc: In function 'long long int nCr(long long int, long long int, const std::vector<long long int>&)':
a.cc:20:33: error: expected primary-expression before 'long'
   20 |         long long denominator = long long(modFact[r] * modFact[n - r]) % MOD;
      |                                 ^~~~
a.cc: In function 'int main()':
a.cc:31:36: error: expected primary-expression before 'long'
   31 |                 modFact.push_back (long long(modFact.back()*i)%MOD);
      |                                    ^~~~
Language: C++

#include <vector>
#include <iostream>
#define MOD 1000000007
using namespace std;
long long fast_pow(long long base, long long n, long long M){
	if (n == 0)	return 1;
	if (n == 1)	return base;
	long long  halfn = fast_pow(base, n / 2, M);
	long long ans;
	if (n % 2 == 0)	ans= long long(halfn * halfn) % M;
	else ans= long long (((halfn * halfn) % M)*base) % M;
	return ans;
}
long long findMMI(int n){
	return fast_pow(n, MOD - 2, MOD);
}
long long  nCr(long long n, long long r, const vector<long long>& modFact){
	long long ans;
	long long numerator = modFact[n];
	long long denominator = long long(modFact[r] * modFact[n - r]) % MOD;
	long long denMMI = findMMI(denominator);
	ans = (numerator * denMMI) % MOD;
	return ans;
}
int main()
{
	int h, w, a, b;
	cin >> h >> w >> a >> b;
	vector<long long> modFact = { 1 };
	for (int i = 1; i <= w + h; ++i){
		modFact.push_back (long long(modFact.back()*i)%MOD);
	}
	long long ans = 0;
	for (int t = 1; t <= h - a; ++t){
		long long first = nCr(b + t - 2, b - 1, modFact);
		long long second = nCr(w - b + h - t - 1, w - b - 1, modFact);
		long long fcs = (first*second)%MOD;
		ans +=fcs;
		ans %= MOD;
	}
	cout << ans << endl;
	cin >> a;
	return 0;
}

Compiler output:
a.cc: In function 'long long int fast_pow(long long int, long long int, long long int)':
a.cc:10:30: error: expected primary-expression before 'long'
   10 |         if (n % 2 == 0) ans= long long(halfn * halfn) % M;
      |                              ^~~~
a.cc:11:19: error: expected primary-expression before 'long'
   11 |         else ans= long long (((halfn * halfn) % M)*base) % M;
      |                   ^~~~
a.cc: In function 'long long int nCr(long long int, long long int, const std::vector<long long int>&)':
a.cc:20:33: error: expected primary-expression before 'long'
   20 |         long long denominator = long long(modFact[r] * modFact[n - r]) % MOD;
      |                                 ^~~~
a.cc: In function 'int main()':
a.cc:31:36: error: expected primary-expression before 'long'
   31 |                 modFact.push_back (long long(modFact.back()*i)%MOD);
      |                                    ^~~~
Language: Java

import java.util.Scanner;
import java.math.*;

/**
 * http://abc042.contest.atcoder.jp/tasks/arc058_b
 * @author Cummin
 */
public class Main {
    
    public static void main(String[] args) {
        int H, W, A, B ;
         // データの読み込み
        Scanner sc = new Scanner(System.in);
        H = sc.nextInt();
        W = sc.nextInt();
        A = sc.nextInt();
        B = sc.nextInt();

        BigInteger mod1000000007 = new BigInteger("1000000007") ;

        BigInteger Bans1= new BigInteger("1") ;
        long ans1[] = new long[(H-A)] ; 
        ans1[0] = 1 ;
        for (int i=2; i <=H-A; i++) {
            Bans1 = (Bans1.multiply(BigInteger.valueOf(B+i-2))).divide(BigInteger.valueOf(i-1)) ;
            ans1[i-1] = Bans1.mod(mod1000000007).intValue() ;
        BigInteger Bans2= new BigInteger("1") ;
        long ans2[] = new long[(H)] ; 
        ans2[0] = 1 ;
        for (int i=2; i <=H; i++) {
            Bans2 = Bans2.multiply(BigInteger.valueOf(((W-B)+i-2))).divide(BigInteger.valueOf(i-1)) ;
            ans2[i-1] = Bans2.mod(mod1000000007).intValue() ;
        }
        long ans = 0 ;
        
        for (int i=0; i<(H-A); i++) {
            ans = (ans + ans1[i]*ans2[(int)(H-1)-i]) % 1000000007 ;
            System.out.println(ans) ;
    }
}

Compiler output:
Main.java:40: error: reached end of file while parsing
}
 ^
1 error
Language: C++

#include <iostream>
#include <string>
#define int long long
using namespace std;
const int MOD = 1e9+7;
 
int pot(int x, int p) {
if (p == 0) return 1;
int z = pot(x, p/2);
z = (z*z)%MOD;
if (p%2) z = (z*x) % MOD;
return z;
}
 
int inv(int x) {
return pot(x, MOD-2);
}
 
int pows[200000 + 10];
int powsinv[200000 + 10];
 
int calc(int a, int b) {
int x = pows[a+b-2] * powsinv[a-1] % MOD;
x = x * powsinv[b-1] % MOD;
return x;
}
 
signed main(){
pows[0] = 1; powsinv[0] = 1;
for (int i = 1; i < 200000 + 10; i++) {
pows[i] = (pows[i-1] * i) % MOD;
powsinv[i] = inv(pows[i]);
}
 
int res = 0;
for (int i = b+1; i <= w; i++) {
  int x = calc(h - a, i) * calc(a, w-i+1) % MOD; 
  res = (res + x) % MOD;
}
 
cout << res << "\n";
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:14: error: 'b' was not declared in this scope
   36 | for (int i = b+1; i <= w; i++) {
      |              ^
a.cc:36:24: error: 'w' was not declared in this scope
   36 | for (int i = b+1; i <= w; i++) {
      |                        ^
a.cc:37:16: error: 'h' was not declared in this scope
   37 |   int x = calc(h - a, i) * calc(a, w-i+1) % MOD;
      |                ^
a.cc:37:20: error: 'a' was not declared in this scope
   37 |   int x = calc(h - a, i) * calc(a, w-i+1) % MOD;
      |                    ^
Language: C++

#include <iostream>
#include <string>
#define int long long
using namespace std;
const int MOD = 1e9+7;

int pot(int x, int p) {
if (p == 0) return 1;
int z = pot(x, p/2);
z = (z*z)%MOD;
if (p%2) z = (z*x) % MOD;
return z;
}

int inv(int x) {
return pot(x, MOD-2);
}

int pows[20000 + 10];
int powsinv[20000 + 10];

int calc(int a, int b) {
int x = pows[a+b-2] * powsinv[a-1] % MOD;
x = x * powsinv[b-1] % MOD;
return x;
}

signed main(){
pows[0] = 1; powsinv[0] = 1;
for (int i = 1; i < 20000 + 10; i++) {
pows[i] = (pows[i-1] * i) % MOD;
powsinv[i] = inv(pows[i]);
}

int res = 0;
for (int i = b+1; i <= w; i++) {
  int x = calc(h - a, i) * calc(a, w-i+1) % MOD; 
  res = (res + x) % MOD;
}

cout << res << "\n";
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:14: error: 'b' was not declared in this scope
   36 | for (int i = b+1; i <= w; i++) {
      |              ^
a.cc:36:24: error: 'w' was not declared in this scope
   36 | for (int i = b+1; i <= w; i++) {
      |                        ^
a.cc:37:16: error: 'h' was not declared in this scope
   37 |   int x = calc(h - a, i) * calc(a, w-i+1) % MOD;
      |                ^
a.cc:37:20: error: 'a' was not declared in this scope
   37 |   int x = calc(h - a, i) * calc(a, w-i+1) % MOD;
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

#define REP(i,n) for(int i=0;i<n;i++)
#define rep(i,n) for(int i=0;i<n;i++)
#define INF INT_MAX/3
#define LINF LLONG_MAX/3
#define MP make_pair
#define PB push_back
#define EB emplace_back
#define ALL(v) (v).begin(),(v).end()
#define debug(x) cout<<#x<<":"<<x<<endl
#define debug2(x,y) cout<<#x<<","<<#y":"<<x<<","<<y<<endl
template<typename T>
ostream& operator<<(ostream& os,const vector<T>& vec){
    os << "[";
    for(const auto& v : vec){
        os << v << ",";
    }
    os << "]";
    return os;
}

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const ll MOD = 1e9+7;
ll fact[200002];
ll fact_inv[200002];

ll mod_pow(ll x,ll n,ll mod){
    ll res=1;
    while(n){
        if(n&1) res = (res*x)%mod;
        x = (x*x)%mod;
        n>>=1;
    }
    return res;
}

ll invp(ll x,ll mod){
    return mod_pow(x,mod-2,mod);
}

ll nCr(ll n,ll r,ll mod){
    ll ret = fact[n];
    ret = (ret * fact_inv[r]) % mod;
    ret = (ret * fact_inv[n-r]) % mod;
    return ret;
}

void init(){
    fact[0]=1;
    for(int i=1;i<MAX_N;i++) fact[i]=(fact[i-1]*i)%MOD;
    for(int i=0;i<MAX_N;i++) fact_inv[i]=invp(fact[i],MOD);
}
int main(){
    ll H,W,A,B;
    cin>>H>>W>>A>>B;

    init();

    ll ans = 0;
    for(int i=B+1;i<=W;i++){
        int le = i-1;
        int hi = H-A-1;
        ll tmp1 = nCr(le+hi,hi,MOD);
        int ri = W-i;
        int un = A-1;
        ll tmp2 = nCr(ri+un,un,MOD);
        ll tmp = (tmp1 * tmp2) % MOD;
        ans = (ans+tmp) % MOD;
    }
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'void init()':
a.cc:57:19: error: 'MAX_N' was not declared in this scope
   57 |     for(int i=1;i<MAX_N;i++) fact[i]=(fact[i-1]*i)%MOD;
      |                   ^~~~~
a.cc:58:19: error: 'MAX_N' was not declared in this scope
   58 |     for(int i=0;i<MAX_N;i++) fact_inv[i]=invp(fact[i],MOD);
      |                   ^~~~~
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
#define mod 1e9+ 7 
int main(){
	int h, w, a, b;
	int dp[2][100000];
	cin >> h >> w >> a >> b;
	for (int i = 0; i < h; i++) {
		for (int j = 0; j < w; j++) {
			if (i >= h - a && j >= w - b) break;
			else {
				dp[1][j] = dp[0][j];
				if (j)
					dp[1][j] = dp[1][j - 1];
			}
		}
		for (int j = 0; < w; j++) {
			dp[0][j] = dp[1][j];
			dp[1][j] = 0;
		}
	}
	cout << dp[1][w -1] << endl;
}


/*2232 9
0 1 3 4 5 6  9 7 8
*/

Compiler output:
a.cc: In function 'int main()':
a.cc:19:33: error: expected primary-expression before '<' token
   19 |                 for (int j = 0; < w; j++) {
      |                                 ^
Language: C++

#include<iostream>
#include<iomanip>
#include<algorithm>
#include<array>
#include<bitset>
#include<cassert>
#include<cctype>
#include<cmath>
#include<cstdio>
#include<cstring>
#include<functional>
#include<limits>
#include<list>
#include<map>
#include<numeric>
#include<set>
#include<stack>
#include<string>
#include<sstream>
#include<queue>
#include<vector>
using namespace std;

using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;

#define dump(o) { cerr << #o << " " << o << endl; }
#define dumpc(o) { cerr << #o; for (auto &e : (o)) cerr << " " << e; cerr << endl; }
#define MOD 1000000007
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3fLL

#define MAX 100000

int main() {
	int H, W, A, B; cin >> H >> W >> A >> B;
	static int b[MAX][MAX] = { 1 };
	for (int h = 0; h < H; h++) {
		for (int w = 0; w < W; w++) {
			if (h + 1 < H - A || B - 1 < w)
				b[h + 1][w] += b[h][w];
			if (h < H - A || B - 1 < w + 1)
				b[h][w + 1] += b[h][w];
			b[h + 1][w] %= MOD;
			b[h][w + 1] %= MOD;
		}
	}
	cout << b[H - 1][W - 1] << endl;
	return 0;
}

Compiler output:
g++: internal compiler error: File size limit exceeded signal terminated program as
Please submit a full bug report, with preprocessed source (by using -freport-bug).
See <file:///usr/share/doc/gcc-14/README.Bugs> for instructions.
Language: C++

#include <cstdio>
#define mod 1000000007
using namespace std;
int H, W, A, B, fact[222222], inv[222222], factinv[222222], z[222222], ret;
inline int ncr(int xx, int yy) {
	if (xx < 0 || yy < 0 || xx < yy) return 0;
	return 1LL * fact[xx] * factinv[yy] % mod * factinv[xx - yy] % mod;
}
int main() {
	fact[0] = 1;
	for (int i = 1; i <= 200009; i++) fact[i] = 1LL * fact[i - 1] * i % mod;
	inv[1] = 1;
	for (int i = 2; i <= 200009; i++) inv[i] = 1LL * inv[mod % i] * (mod - mod / i) % mod;
	factinv[0] = 1;
	for (int i = 1; i <= 200009; i++) factinv[i] = 1LL * factinv[i - 1] * inv[i] % mod;
	scanf("%d%d%d%d", &H, &W, &A, &B);
	for (int i = 0; i < W - B; i++) ret = (ret + 1LL * ncr(A + i - 1, i) * ncr(W - i + H - A - 2, H - A - 1) % mod;
	printf("%d\n", ret);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:119: error: expected ')' before ';' token
   17 |         for (int i = 0; i < W - B; i++) ret = (ret + 1LL * ncr(A + i - 1, i) * ncr(W - i + H - A - 2, H - A - 1) % mod;
      |                                               ~                                                                       ^
Language: Java

import java.util.Arrays;
import java.util.Scanner;

public class BBQ_Easy {

	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int k=sc.nextInt(), res=0;
		int[] s=new int[k*2];
		for(int i=0; i<k*2; ++i) s[i]=sc.nextInt();
		Arrays.sort(s);
		for(int i=k*2-1; i>=0; --i)
			if(i%2==0)  res+=s[i];
		System.out.println(res);
		sc.close(); 
	}

}

Compiler output:
Main.java:4: error: class BBQ_Easy is public, should be declared in a file named BBQ_Easy.java
public class BBQ_Easy {
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
  int n;
  cin >> n;
  int a[2*n];
  for(int i = 0; i < 2*n; ++i){
    cin >> a[i];
  }
  sort(a,a+2*n);
  int res = 0;
  for(int i = 0; i < 2*n; i += 2){
    res += a[i]
  }
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:16: error: expected ';' before '}' token
   14 |     res += a[i]
      |                ^
      |                ;
   15 |   }
      |   ~
Language: C++

#incldue <bits/stdc++.h>
using namespace std;

int main () {
	int n;
  	cin >> n;
  	vector <int> L(2*n);
  
  	for (int i=0; i<L.size(); i++)
      	cin >>  L[i];
  	
  	sort (L.begin(), L.end());
  	int res = 0;
  	for (int i=0; i<L.size(); i+=2) {
    	res += min (L[i], L[i+1]);
    }
  
  	cout << res;
  
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incldue; did you mean #include?
    1 | #incldue <bits/stdc++.h>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin >> n;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #incldue <bits/stdc++.h>
a.cc:7:9: error: 'vector' was not declared in this scope
    7 |         vector <int> L(2*n);
      |         ^~~~~~
a.cc:1:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
  +++ |+#include <vector>
    1 | #incldue <bits/stdc++.h>
a.cc:7:17: error: expected primary-expression before 'int'
    7 |         vector <int> L(2*n);
      |                 ^~~
a.cc:9:25: error: 'L' was not declared in this scope
    9 |         for (int i=0; i<L.size(); i++)
      |                         ^
a.cc:12:15: error: 'L' was not declared in this scope
   12 |         sort (L.begin(), L.end());
      |               ^
a.cc:12:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |         sort (L.begin(), L.end());
      |         ^~~~
      |         short
a.cc:15:16: error: 'min' was not declared in this scope; did you mean 'main'?
   15 |         res += min (L[i], L[i+1]);
      |                ^~~
      |                main
a.cc:18:9: error: 'cout' was not declared in this scope
   18 |         cout << res;
      |         ^~~~
a.cc:18:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include <iostream>
#include <vector>
using namespace std;

int main() {
  int N;
  cin >> N;
  vector<int> L(2*N);
  for(int i = 0; i < 2 * N; i++){
    cin >> L[i];
  }
  sort(L.begin(),L.end());
  int ans=0;
  for(int i = 0; i < 2 * N; i +=2){
    ans+ = L[i];
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |   sort(L.begin(),L.end());
      |   ^~~~
      |   short
a.cc:15:10: error: expected primary-expression before '=' token
   15 |     ans+ = L[i];
      |          ^