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

#include <iostream>
#include <cstdio>
#include<cstring>
using namespace std;
typedef long long ll;
int main()
{
  ll n,k;
  cin>>n>>k;
  ll i,ans=0;
  for(k==0)
    ans=n*n;
  else{
    for(i=k+1;i<=n;i++){
        ans+=(i-k)*(n/i);
        ll b=(n/i)*i+k;
        if(n>=b)
            ans+=n-b+1;
    }
  }
cout<<ans<<endl;
    return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:11: error: expected ';' before ')' token
   11 |   for(k==0)
      |           ^
      |           ;
a.cc:13:3: error: expected primary-expression before 'else'
   13 |   else{
      |   ^~~~
a.cc:12:13: error: expected ';' before 'else'
   12 |     ans=n*n;
      |             ^
      |             ;
   13 |   else{
      |   ~~~~       
a.cc:13:3: error: expected primary-expression before 'else'
   13 |   else{
      |   ^~~~
a.cc:12:13: error: expected ')' before 'else'
   12 |     ans=n*n;
      |             ^
      |             )
   13 |   else{
      |   ~~~~       
a.cc:11:6: note: to match this '('
   11 |   for(k==0)
      |      ^
a.cc:13:3: error: expected primary-expression before 'else'
   13 |   else{
      |   ^~~~
Language: C++

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <algorithm>
using namespace std;
long long m,n;
int main() {
    int ans=0,a,b,n,k,j,cnt=0,flag;
    cin>>n>>k;
    if(k==0){flag=1;k=1;}
    for(int b=k+1;b<=n;b++)
    {
        for(j=0;j<=b-k-1;j++)
            cnt+=floor((n-k-j)/(b))+1;
    }
    if(flag==1)
    {
        for(int j=1;j<=n;j++)
            cnt+=floor(n/j);
    }
    cout<<cnt<<endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:16:18: error: 'floor' was not declared in this scope
   16 |             cnt+=floor((n-k-j)/(b))+1;
      |                  ^~~~~
a.cc:21:18: error: 'floor' was not declared in this scope
   21 |             cnt+=floor(n/j);
      |                  ^~~~~
Language: C++

#include <bits/stdc++.h>

#define INF 1 << 29
#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,k,n) for(int i=(k);i<(int)(n);i++)

using namespace std;

typedef pair<int,int> pii;
typedef long long int ll;

void gen_sosuu(int sosuu[]){
  REP(i,100010){
    sosuu[i] = true;
  }
  sosuu[0] = false;
  sosuu[1] = false;
  sosuu[2] = true;
  FOR(i,2,sqrt(100000)+1){
    if(sosuu[i] == false) continue;
    for(int j = 2; i*j<=100000;j++){
      //printf("%d %d %d\n",i*j,i,j);
      sosuu[i*j] =false;
    }
  }
}

ll n,k;

int main(){
  scanf("%lld %lld",&n,&k);
  //n以下のaをbで割ったあまりがk以上である数字の個数
  ll cnt = 0;
  if(k==0){
    printf("%d\n",n);
    return 0;:
  }
  FOR(i,k,n+1){
    FOR(b,i+1,n+1){
      cnt += (n-i)/b + 1;
    }
  }
  printf("%lld\n",cnt);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:36:14: error: expected primary-expression before ':' token
   36 |     return 0;:
      |              ^
Language: C++

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cmath>
#include<algorithm>
#include<cstdlib>
#include<utility>
#include<map>
#include<stack>
#include<set>
#include<vector>
#include<queue>
#include<deque>
#include<sstream>
#include<bitset>
#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,k,cnt;
	cin>>n>>K;
	for (int i=1;i<=n;i++)
	  for (int j=1;j<=n;j++)
	  {
	  	if (i%j>=k) cnt++; 
	  }
	  cout<<cnt;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:17: error: 'K' was not declared in this scope
   22 |         cin>>n>>K;
      |                 ^
Language: C++

#include <iostream>
long long n,m;
signed main(){
    cin>>n>>m;
    cout<<abs(n-2)*abs(m-2);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |     cin>>n>>m;
      |     ^~~
      |     std::cin
In file included 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:5:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    5 |     cout<<abs(n-2)*abs(m-2);
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>
//#pragma GCC diagnostic error "-Wconversion"
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define all(vec) vec.begin(), vec.end()
#define mp(a, b) make_pair(a, b)
typedef long long ll;
const ll INF = 1LL << 60;
const ll MOD = (1e9 + 7);
using namespace std;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
ll dp[100010];
ll gcd(ll x, ll y){
  return y == 0 ? x : gcd(y, x % y);
}
ll lcg(ll x, ll y){
  return x * y / gcd(x, y);
}
ll digits(ll x){
  ll length = 0;
  while (x > 0){
    x /= 10;
    length++;
  }
  return length;
  if (x == 0) return 0;
}
map<ll, ll> factor(ll n){
  map<ll, ll> ans;
  ll a = 2;
  while (n >= a * a){
    if (n % a == 0){
      ans[a]++;
      n /= a;
    }
    else a++;
  }
  ans[n]++;
  return ans;
}
template<class T> inline bool chmin(T& a, T b){
  if (a > b){
    a = b;
    return true;
  }
  return false;
}
template<class T> inline bool chmax(T& a, T b){
  if (a < b){
    a = b;
    return true;
  }
  return false;
}

int main(){
  cout << fixed << setprecision(15);
  ll ans = 0;
  //string ans = "No";

  int a, b; cin >> a >> b; ans = (ll)(a - 2) * (ll)(b - 2);

  (if a == b && a == 1){
    cout << 0 << endl;
    return 0;
  }

  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:64:4: error: expected primary-expression before 'if'
   64 |   (if a == b && a == 1){
      |    ^~
a.cc:64:4: error: expected ')' before 'if'
   64 |   (if a == b && a == 1){
      |   ~^~
      |    )
Language: C++

#include <iostream>

typedef long long ll;

int main() {
  ll N, M;  std::cin >> N >> M;
  if (N > M)  std::swap(N, M);
  if (N == 1)
    std::cout << std::max(0, M-2) << "\n";
  else
    std::cout << (N-1) * (M-1) << "\n";


  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:26: error: no matching function for call to 'max(int, ll)'
    9 |     std::cout << std::max(0, M-2) << "\n";
      |                  ~~~~~~~~^~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:9:26: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
    9 |     std::cout << std::max(0, M-2) << "\n";
      |                  ~~~~~~~~^~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
Language: C++

#include<bits/stdc++.c>

using namespace std;
using ll = long long;

#define MAX(a,b) (((a)>(b))?(a):(b))

int main()
{
  ll N, M, A;
  cin >> N >> M;
  if(N==1&&M==1) A=1;
  if(N==1&&M!=1) A=MAX(M-2,0);
  if(N!=1&&M==1) A=MAX(N-2,0);
  if(N!=1&&M!=1) A=MAX(2M-4,0)+MAX(2N-4,0);
  cout << A << endl;
  return 0;
}

Compiler output:
a.cc:1:9: fatal error: bits/stdc++.c: No such file or directory
    1 | #include<bits/stdc++.c>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
#define REP(i, m, n) for(ll i = (ll)m; i < (ll)n; i++)
#define PER(i, m, n) for(ll i = (ll)m; i > (ll)n; i--)
#define INF 1e9
#define ALL(v) v.begin(), v.end()
#define _GLIBCXX_DEBUG

template <uint MD> struct ModInt {
    using M = ModInt;
    const static M G;
    uint v;
    ModInt(ll _v = 0) { set_v(uint(_v % MD + MD)); }
    M& set_v(uint _v) {
        v = (_v < MD) ? _v : _v - MD;
        return *this;
    }
    explicit operator bool() const { return v != 0; }
    M operator-() const { return M() - *this; }
    M operator+(const M& r) const { return M().set_v(v + r.v); }
    M operator-(const M& r) const { return M().set_v(v + MD - r.v); }
    M operator*(const M& r) const { return M().set_v(uint(ull(v) * r.v % MD)); }
    M operator/(const M& r) const { return *this * r.inv(); }
    M& operator+=(const M& r) { return *this = *this + r; }
    M& operator-=(const M& r) { return *this = *this - r; }
    M& operator*=(const M& r) { return *this = *this * r; }
    M& operator/=(const M& r) { return *this = *this / r; }
    bool operator==(const M& r) const { return v == r.v; }
    M pow(ll n) const {
        M x = *this, r = 1;
        while (n) {
            if (n & 1) r *= x;
            x *= x;
            n >>= 1;
        }
        return r;
    }
    M inv() const { return pow(MD - 2); }
    friend ostream& operator<<(ostream& os, const M& r) { return os << r.v; }
};
using Mint = ModInt<1000000007>;

const double PI = 3.14159265358979323846;

bool compare_by_b(pair<int, int> a, pair<int, int> b) {
    if(a.second != b.second){
        return a.second < b.second;
    }else{
        return a.first < b.first;
    }
}

bool is_prime(long long N) {
    if (N == 1) return false;
    for (long long i = 2; i * i <= N; ++i) {
        if (N % i == 0) return false;
    }
    return true;
}

int main(){
    ll row, column;
    cin >> row >> column;
    ll ans = 0;
    ll n = min(row, column);
    ll m = max(row, column);

    if(n == 1 && m = 1) ans = 1;
    else if(n == 1) ans = m-2;
    else ans = (n-2)*(m-2);
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:71:15: error: lvalue required as left operand of assignment
   71 |     if(n == 1 && m = 1) ans = 1;
      |        ~~~~~~~^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
#define REP(i, m, n) for(ll i = (ll)m; i < (ll)n; i++)
#define PER(i, m, n) for(ll i = (ll)m; i > (ll)n; i--)
#define INF 1e9
#define ALL(v) v.begin(), v.end()
#define _GLIBCXX_DEBUG

template <uint MD> struct ModInt {
    using M = ModInt;
    const static M G;
    uint v;
    ModInt(ll _v = 0) { set_v(uint(_v % MD + MD)); }
    M& set_v(uint _v) {
        v = (_v < MD) ? _v : _v - MD;
        return *this;
    }
    explicit operator bool() const { return v != 0; }
    M operator-() const { return M() - *this; }
    M operator+(const M& r) const { return M().set_v(v + r.v); }
    M operator-(const M& r) const { return M().set_v(v + MD - r.v); }
    M operator*(const M& r) const { return M().set_v(uint(ull(v) * r.v % MD)); }
    M operator/(const M& r) const { return *this * r.inv(); }
    M& operator+=(const M& r) { return *this = *this + r; }
    M& operator-=(const M& r) { return *this = *this - r; }
    M& operator*=(const M& r) { return *this = *this * r; }
    M& operator/=(const M& r) { return *this = *this / r; }
    bool operator==(const M& r) const { return v == r.v; }
    M pow(ll n) const {
        M x = *this, r = 1;
        while (n) {
            if (n & 1) r *= x;
            x *= x;
            n >>= 1;
        }
        return r;
    }
    M inv() const { return pow(MD - 2); }
    friend ostream& operator<<(ostream& os, const M& r) { return os << r.v; }
};
using Mint = ModInt<1000000007>;

const double PI = 3.14159265358979323846;

bool compare_by_b(pair<int, int> a, pair<int, int> b) {
    if(a.second != b.second){
        return a.second < b.second;
    }else{
        return a.first < b.first;
    }
}

bool is_prime(long long N) {
    if (N == 1) return false;
    for (long long i = 2; i * i <= N; ++i) {
        if (N % i == 0) return false;
    }
    return true;
}

int main(){
    ll row, column;
    cin >> row >> column;
    ll ans = 0;
    ll n = min(row, column);
    ll m = max(row, column);

    if(n == 1 && m = 1) ans = 1;
    else if(n = 1) ans = m-2;
    else ans = (n-2)*(m-2);
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:71:15: error: lvalue required as left operand of assignment
   71 |     if(n == 1 && m = 1) ans = 1;
      |        ~~~~~~~^~~~
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int, int>;

signed main() {
  ll num = 0;
  ll n, m;
  cin >> n >> m;

  if (n == m) {
    if (n == 1) num = 1;
    else if (n == 2) num = 0;
  } else if (n == 1 || m == 1) {
    num = max(n, m) - 2;
  } else {
    num = max(0, (n - 2) * (m - 2));
  }

  if (n == m && n == 1) num = 1;
  else if (n == m && n == 2) num = 0;
  // else if (n == m && n >= 3) num = (n - 2) * (m - 2);
  else if (n == 1 || m == 1) num = max(n, m) - 2;
  else num = (n - 2) * (m - 2);

  cout << num << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:14: error: no matching function for call to 'max(int, ll)'
   18 |     num = max(0, (n - 2) * (m - 2));
      |           ~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
   18 |     num = max(0, (n - 2) * (m - 2));
      |           ~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:18:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   18 |     num = max(0, (n - 2) * (m - 2));
      |           ~~~^~~~~~~~~~~~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(void){
    ll n,m;
    cin >> n >> m;
    
    if(n == 1 && m == 1){
        cout << 1 << endl;
        return 0;
    }
    else if(n == 1 || m == 1){
        cout << n*m -2 << endl;
        return 0;
    }
    else if(n ==2 || m == 2) {
        cout << 0 << endl;
        return 0;
    }
    else{
        cout << n*m - (2*(n+m)-4) << endl;
        return 0;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'll' was not declared in this scope
    4 |     ll n,m;
      |     ^~
a.cc:5:12: error: 'n' was not declared in this scope; did you mean 'yn'?
    5 |     cin >> n >> m;
      |            ^
      |            yn
a.cc:5:17: error: 'm' was not declared in this scope; did you mean 'tm'?
    5 |     cin >> n >> m;
      |                 ^
      |                 tm
Language: C++




#include <bits/stdc++.h>
#include <string.h>
#include <vector>
//s#define rep(i, n) for (int i = 0; i < (n); i++)
#define MAX 10000

using namespace std;

#define ll long long
#define pb push_back
#define mp make_pair
#define all(a) (a).begin(),(a).end()
#define rep(i,a,n) for(int i=a; i<n; i++)
#define r0 return 0
#define INF (int)1e15
#define MOD 1000000007

 int main(){

 long long n,m;
 cin>>n>>m;

  if(n == 1) n = 1;
  else n = n-2

  if(m == 1) m =1;
  else m = m-2;

  cout<<n*m<<endl;


 return 0;
 }

Compiler output:
a.cc: In function 'int main()':
a.cc:27:15: error: expected ';' before 'if'
   27 |   else n = n-2
      |               ^
      |               ;
   28 | 
   29 |   if(m == 1) m =1;
      |   ~~           
a.cc:30:3: error: 'else' without a previous 'if'
   30 |   else m = m-2;
      |   ^~~~
Language: C++

#include<bits/stdc++.h>

using namespace std;

int main(){
         int n, int k;
         cin>>n>>k;
         cout<<(n-2)*(k-2)<<"\n";
         return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: expected unqualified-id before 'int'
    6 |          int n, int k;
      |                 ^~~
a.cc:7:18: error: 'k' was not declared in this scope
    7 |          cin>>n>>k;
      |                  ^
Language: C++

#include<bits/stdc++.h>
#define rep(i,j,n) for(int i=(j);i<(n);i++)
#define per(i,n,j) for(int i=(n);i>=(j);i--)
using ll=long long;
using namespace std;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
const ll INF=1LL<<60;

ll n,m;

int main(){
    cin>>n>>m;
    ll ans;
    if(n==1 && m==1) ans=0;
    else if(n==1 || m==1) ans=max(0,n*m-2);
    else if(n==2 || m==2) ans=0;
    else ans=(n-2)*(m-2);
    cout<<ans<<"\n";
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:34: error: no matching function for call to 'max(int, ll)'
   16 |     else if(n==1 || m==1) ans=max(0,n*m-2);
      |                               ~~~^~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:16:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
   16 |     else if(n==1 || m==1) ans=max(0,n*m-2);
      |                               ~~~^~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:16:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   16 |     else if(n==1 || m==1) ans=max(0,n*m-2);
      |                               ~~~^~~~~~~~~
Language: C++

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

int main() {
    int n, m; scanf("%d%d", &n, &m);
    if      (n==1 && m==1) {printf("%d\n", 1;}
    else if (n==1        ) {printf("%d\n", m-2);}
    else if (        m==1) {printf("%d\n", n-2);}
    else                   {printf("%d\n", abs((n-2)*(m-2)));}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:45: error: expected ')' before ';' token
    6 |     if      (n==1 && m==1) {printf("%d\n", 1;}
      |                                   ~         ^
      |                                             )
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vi=vector<int>;
using vvi=vector<vi>;
using vl=vector<ll>;
using vvl=vector<vl>;
using pii = pair<int,int>;
using pli = pair<ll,int>;
using pll = pair<ll,ll>;
using vpii = vector<pii>;
using vpli = vector<pli>;
using vpll = vector<pll>;

#define rep(i, n) for(int i=0;i<(int)n;i++)
#define rep2(i, s, n) for(int i=(s);i<(int)n;i++)
int INF=1e9+7;

int main() {
  int N,M;
  cin >> N >> M;
  if(N>=2&&M>=2) cout << (N-2)*(M-2) << endl;
  else if(N==1&&M==1) cout << 1 << endl;
  else cout << max(N-2,M-2) << endl;
}
}

Compiler output:
a.cc:26:1: error: expected declaration before '}' token
   26 | }
      | ^
Language: C++

# include <bits/stdc++.h>
typedef long long int lint;
using namespace std;

lint gcd(lint x, lint y) {
  if(x == 0) { return y; }
  else { return gcd(y%x,x); }
}

lint lcm(lint x, lint y) { return abs(x-y)/gcd(x,y); }


int main() {
  lint ans,n,m; cin >> n >> m;

  if(n>1 && m>1) { ans = (n-2)*(m-2); }
  else if(n==1) { ans = m-2; }
  else if(m==1) { ans = n-2; }

  cout << ans << endl;
  return 0;
}
~

Compiler output:
a.cc:23:2: error: expected class-name at end of input
   23 | ~
      |  ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
void main(void) {
    long long n,m;
    cin >> n >> m;
    long long ans = 0LL;
    if (n>=2LL && m>=2LL) {
        ans = (n-2LL)*(m-2LL);
    }
    else if(n==1LL && m==1LL) {
        ans = 1LL;
    }
    else {
        ans = max(0LL, n-2LL) + max(0LL, m-2LL);
    }
    cout << ans << endl;
    return;
}

Compiler output:
a.cc:3:1: error: '::main' must return 'int'
    3 | void main(void) {
      | ^~~~
a.cc: In function 'int main()':
a.cc:17:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   17 |     return;
      |     ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

int main () {
  ll n, m;
  cin >> n >> m;
  ll s = min(n, m);
  ll t = max(n, m);
  ll ans;
  if(s >= 3) ans = (s-2)*(t-2);
  else if(s == 2) ans = 0;
  else {
    ans = t-2;
  }
  if(ans < 0) ans = 0;
  cout

Compiler output:
a.cc: In function 'int main()':
a.cc:18:7: error: expected ';' at end of input
   18 |   cout
      |       ^
      |       ;
a.cc:18:7: error: expected '}' at end of input
a.cc:6:13: note: to match this '{'
    6 | int main () {
      |             ^
Language: C++

#include <cstring>
#include <iostream>
#include <numeric>
#include <bits/stdc++.h>
using namespace std;
int main(){
long long N,M;
cin>>N>>M;
long long a;
if(N>=3&&M>=3){
a=(M-2)*(N-2);}
else if(M==2||N==2){
a=0;}
else if(N==1&&M==1){
a=1;}
else if(N==1){
a=M-2;}
else if(M==1){
a=N-2}

cout<<a<<endl;}
  


Compiler output:
a.cc: In function 'int main()':
a.cc:19:6: error: expected ';' before '}' token
   19 | a=N-2}
      |      ^
      |      ;
Language: C++

int main() {
  int N, M;
  cin >> N >> M;
  if(N == 1 && M == 1){
    cout << 1 << endl;
  }
  else if(N == 1){
    cout << M - 2 << endl;
  }
  else if(M == 1){
    cout << N - 2 << endl;
  }
  else{
    cout << (M - 2) * (N - 2) << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> N >> M;
      |   ^~~
a.cc:5:5: error: 'cout' was not declared in this scope
    5 |     cout << 1 << endl;
      |     ^~~~
a.cc:5:18: error: 'endl' was not declared in this scope
    5 |     cout << 1 << endl;
      |                  ^~~~
a.cc:8:5: error: 'cout' was not declared in this scope
    8 |     cout << M - 2 << endl;
      |     ^~~~
a.cc:8:22: error: 'endl' was not declared in this scope
    8 |     cout << M - 2 << endl;
      |                      ^~~~
a.cc:11:5: error: 'cout' was not declared in this scope
   11 |     cout << N - 2 << endl;
      |     ^~~~
a.cc:11:22: error: 'endl' was not declared in this scope
   11 |     cout << N - 2 << endl;
      |                      ^~~~
a.cc:14:5: error: 'cout' was not declared in this scope
   14 |     cout << (M - 2) * (N - 2) << endl;
      |     ^~~~
a.cc:14:34: error: 'endl' was not declared in this scope
   14 |     cout << (M - 2) * (N - 2) << endl;
      |                                  ^~~~
Language: C++

#pragma region
#include <bits/stdc++.h>
using namespace std;
inline void ci(void){
  return;
}
template <typename First, typename... Rest>
void ci(First& first, Rest&... rest){
  cin >> first;
  ci(rest...);
  return;
}
inline void co(void){
  cout << endl;
  return;
}
template <typename First, typename... Rest>
void co(First first, Rest... rest){
  cout << first << "";
  co(rest...);
  return;
}
#define ll long long
#define ld long double
#define st string
#define wh while
#define ve vector
#define mp make_pair
#define tp tuple
#define mt make_tuple
#define pb push_back
#define pof pop_front
#define pob pop_back
#define pf push_front
#define fr front
#define ft first
#define sc second
#define tos to_string
#define len length
#define rt return
#define br break
#define con continue
#define lcm(n, m) (n * m / gcd(n, m))
#define np next_permutation
#define repi(i, m, n) for(int i=(int)(m);i<(int)(n);i++)
#define rep(i, n) repi(i, 0, n)
#define repill(i, m, n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define repll(i, n) repill(i, 0, n)
#define revi(i, m, n) for(int i=(int)(m);i>(int)(n);i--)
#define rev(i, m) revi(i, m, 0)
#define revill(i, m, n) for(ll i=(ll)(m);i>(ll)(n);i--)
#define revll(i, n) revill(i, 0, n)
#define sz(v) ((int)(v).size()) 
#define each(i, n) for(auto&& i: n)
#define all(n) (n.begin(), n.end())
#define allr(n) (n.rbegin(), n.rend())
#define sp(n) cout << fixed << setprecision(n)
#define inf pow(10, 9)
#pragma endregion
// sqrt ルート, int 2*10^9, gcd　最大公約数
// __builtin_popcount bitの個数

ve<int> dx = {0, 0, 1, -1}, dy = {1, -1, 0, 0};

int main() {
  int N, M;
  ci(N, M);
  if(N == 1 && M == 1){
    cout << 1 << endl;
  }
  else if(N == 1){
    M >= 2 ? cout << M - 2 << endl; : cout << 0 << endl;
  }
  else if(M == 1){
    N >= 2 ? cout << N - 2 << endl; : cout << 0 << endl;
  }
  else{
    cout << (M - 2) * (N - 2) << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:72:35: error: expected ':' before ';' token
   72 |     M >= 2 ? cout << M - 2 << endl; : cout << 0 << endl;
      |                                   ^
      |                                   :
a.cc:72:35: error: expected primary-expression before ';' token
a.cc:72:37: error: expected primary-expression before ':' token
   72 |     M >= 2 ? cout << M - 2 << endl; : cout << 0 << endl;
      |                                     ^
a.cc:75:35: error: expected ':' before ';' token
   75 |     N >= 2 ? cout << N - 2 << endl; : cout << 0 << endl;
      |                                   ^
      |                                   :
a.cc:75:35: error: expected primary-expression before ';' token
a.cc:75:37: error: expected primary-expression before ':' token
   75 |     N >= 2 ? cout << N - 2 << endl; : cout << 0 << endl;
      |                                     ^
Language: C++

#pragma region
#include <bits/stdc++.h>
using namespace std;
inline void ci(void){
  return;
}
template <typename First, typename... Rest>
void ci(First& first, Rest&... rest){
  cin >> first;
  ci(rest...);
  return;
}
inline void co(void){
  cout << endl;
  return;
}
template <typename First, typename... Rest>
void co(First first, Rest... rest){
  cout << first << "";
  co(rest...);
  return;
}
#define ll long long
#define ld long double
#define st string
#define wh while
#define ve vector
#define mp make_pair
#define tp tuple
#define mt make_tuple
#define pb push_back
#define pof pop_front
#define pob pop_back
#define pf push_front
#define fr front
#define ft first
#define sc second
#define tos to_string
#define len length
#define rt return
#define br break
#define con continue
#define lcm(n, m) (n * m / gcd(n, m))
#define np next_permutation
#define repi(i, m, n) for(int i=(int)(m);i<(int)(n);i++)
#define rep(i, n) repi(i, 0, n)
#define repill(i, m, n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define repll(i, n) repill(i, 0, n)
#define revi(i, m, n) for(int i=(int)(m);i>(int)(n);i--)
#define rev(i, m) revi(i, m, 0)
#define revill(i, m, n) for(ll i=(ll)(m);i>(ll)(n);i--)
#define revll(i, n) revill(i, 0, n)
#define sz(v) ((int)(v).size()) 
#define each(i, n) for(auto&& i: n)
#define all(n) (n.begin(), n.end())
#define allr(n) (n.rbegin(), n.rend())
#define sp(n) cout << fixed << setprecision(n)
#define inf pow(10, 9)
#pragma endregion
// sqrt ルート, int 2*10^9, gcd　最大公約数
// __builtin_popcount bitの個数

ve<int> dx = {0, 0, 1, -1}, dy = {1, -1, 0, 0};

int main() {
  int N, M;
  ci(N, M);
  if(N == 1 && M == 1){
    cout << 1 << endl;
  }
  else if(N == 1){
    M >= 2 ? cout << M - 2 << endl; : cout << 0 << endl;
  }
  else if(M == 1){
    N >= 2 ? cout << N - 2 << endl; : cout << 0 << endl;;
  }
  else{
    cout << (M - 2) * (N - 2) << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:72:35: error: expected ':' before ';' token
   72 |     M >= 2 ? cout << M - 2 << endl; : cout << 0 << endl;
      |                                   ^
      |                                   :
a.cc:72:35: error: expected primary-expression before ';' token
a.cc:72:37: error: expected primary-expression before ':' token
   72 |     M >= 2 ? cout << M - 2 << endl; : cout << 0 << endl;
      |                                     ^
a.cc:75:35: error: expected ':' before ';' token
   75 |     N >= 2 ? cout << N - 2 << endl; : cout << 0 << endl;;
      |                                   ^
      |                                   :
a.cc:75:35: error: expected primary-expression before ';' token
a.cc:75:37: error: expected primary-expression before ':' token
   75 |     N >= 2 ? cout << N - 2 << endl; : cout << 0 << endl;;
      |                                     ^
Language: C++

#include "bits/stdc++.h"
#define ALL(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<n;++i)

using namespace std;
typedef unsigned long long ll;


int main(void){
    ll h,g;
    cin>>h>>g;
    cout<<abs((h-2)*(w-2));
}
/*
*/


Compiler output:
a.cc: In function 'int main()':
a.cc:12:22: error: 'w' was not declared in this scope
   12 |     cout<<abs((h-2)*(w-2));
      |                      ^
Language: C++

#include "bits/stdc++.h"
#define ALL(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<n;++i)

using namespace std;
typedef unsigned long long ll;


int main(void){
    ll h,g;
    cin>>h>>g;
    cout<<abs((h-2)*(w-2))
}
/*
*/


Compiler output:
a.cc: In function 'int main()':
a.cc:12:22: error: 'w' was not declared in this scope
   12 |     cout<<abs((h-2)*(w-2))
      |                      ^
Language: C++

#include <iostream>
using namespace std;

int main() {
    long long n, m; cin >> n >> m;
    long long ans = llabs((INF-2) * (INF-2));
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:28: error: 'INF' was not declared in this scope
    6 |     long long ans = llabs((INF-2) * (INF-2));
      |                            ^~~
Language: C++

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

int main(){ 
  int64_t N, M; cin >> N >> M;

  int ans;
  if(N == 1 || M == 1){
    ans = max((long long)0, max(N, M)-2);
  } else if (N == 2 || M == 2){
    ans = 0;
  } else {
    ans = (N-2)*(M-2);
  }

  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: no matching function for call to 'max(long long int, long int)'
    9 |     ans = max((long long)0, max(N, M)-2);
      |           ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:9:14: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long int')
    9 |     ans = max((long long)0, max(N, M)-2);
      |           ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:9:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
    9 |     ans = max((long long)0, max(N, M)-2);
      |           ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

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

int main() {
  int64_t n, m;
  cin >> n >> m;
  cout << n*m - (n-1)*2 - (m-1)*2;
}

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

#include <stdio.h>

int main()
{
    int i,j,n,m,tmp;
    scanf("%d %d",&n,&m);
    if(n > m){tmp = n;m = n;m = tmp;}
    if(n >= 2 && m >= 2)
    {
        printf("%d",(n - 2) * (m - 2));
    }
    else if(n == 1 && m >= 2)
    {
        printf("%d",m - 2)
    }
    else
    {
        printf("0");
    }
    
}

Compiler output:
main.c: In function 'main':
main.c:14:27: error: expected ';' before '}' token
   14 |         printf("%d",m - 2)
      |                           ^
      |                           ;
   15 |     }
      |     ~
Language: C++

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define REP(i,a,b) for (int i = a; i < (b); ++i)
#define all(x) (x).begin(),(x).end()
#define YY puts("Yes")
#define NN puts("No")
const int INF = 1000000007;
typedef long long ll;
using namespace std;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { return (a * b) / gcd(a,b); }
ll fac(ll a) { return a > 1 ? fac(a - 1) * a : 1; }
int solve(){
  ll n,m;
  cin >> n >> m;
  cout << (n - 2)(m - 2) << endl;
  return 0;
}
int main(){
  // ios::sync_with_stdio(false);cin.tie(nullptr);
  // cout << fixed;cout << setprecision(16) << endl; 
  solve();
  return 0;
}

Compiler output:
a.cc: In function 'int solve()':
a.cc:19:18: error: expression cannot be used as a function
   19 |   cout << (n - 2)(m - 2) << endl;
      |           ~~~~~~~^~~~~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
    int a,b,c[110],ans =0;
   
    cin >> a >>b;
   
    if(a ==1 && b ==1){
      cout << 1 << endl;
    }
  
  else if( a == 1 && b > 1){
    cout << b-2 << endl;
  }
  else if(a>1 && b==1){
    cout << a-2 << endl
  }
  else if(a>1 && b>1){
    cout << (a-2)*(b-2) << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:24: error: expected ';' before '}' token
   17 |     cout << a-2 << endl
      |                        ^
      |                        ;
   18 |   }
      |   ~
Language: C++

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

typedef long long ll;

ll N, M;

ll solve() {
  if (N >= 2 && M >= 2) return (N - 2) * (M - 2);
  return max({0, M - 2, N - 2});
}
int main() {
  cin >> N >> M;
  cout << solve() << endl;
  return 0;
}


Compiler output:
a.cc: In function 'll solve()':
a.cc:10:13: error: no matching function for call to 'max(<brace-enclosed initializer list>)'
   10 |   return max({0, M - 2, N - 2});
      |          ~~~^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:10:13: note:   deduced conflicting types for parameter '_Tp' ('int' and 'long long int')
   10 |   return max({0, M - 2, N - 2});
      |          ~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define INF 1LL<<62
#define inf 1000000007

int main() {
	ll h,w;
	cin>>h>>w
	if(h==1&&w==1){
		cout << 1;
		return 0;
	}
	if(h==1||w==1){
		cout << (h*w-2>=0? h*w-2:0);
		return 0;
	}
	cout << 	h*w-(2*h+2*w-4);
	// your code goes here
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:18: error: expected ';' before 'if'
    9 |         cin>>h>>w
      |                  ^
      |                  ;
   10 |         if(h==1&&w==1){
      |         ~~
Language: C++

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

int main() {
  long a,b;
  cin >> a >> b;
  cout << abs((a-2)*(b-2));




Compiler output:
a.cc: In function 'int main()':
a.cc:7:28: error: expected '}' at end of input
    7 |   cout << abs((a-2)*(b-2));
      |                            ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

int main(){
 int n,m;
 cin>>n>>m;
if(n>2&&m>2){
  cout<<(n-2)*(m-2)<<endl;
}
  else if(m==2||n==2){
    cout<<0<<endl;
  }
  else if(m==1&&n==1){
    cout<<0<<endl;
  }
  else{
    cout<<max(m,n)-2<<endl;
  }
    
    
}

}

Compiler output:
a.cc:23:1: error: expected declaration before '}' token
   23 | }
      | ^
Language: C++

n, m = map(int, raw_input().split())

if n > m: swap(n, m)

if n == 1:
	if m == 1:
		print 1
	else:
		print m - 2 
	exit(0)

black = (n - 2) * (m - 2)
print black

Compiler output:
a.cc:1:1: error: 'n' does not name a type
    1 | n, m = map(int, raw_input().split())
      | ^
Language: C++

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

int main(){
    ll n,m; cin >> n >> m;
    // 表になるもの　＝　偶数回ひっくり返る -> 四角形の周
    ll ans = 0;
    if(n == 1 && m == 1) ans = 1; // 0次元
    else if(n == 1 || m == 1) ans = n * m - 2; // 1次元
    else ans = n * m  - (n + m) * 2  + 4; // 2次元
    cout << ans << endl; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'll' was not declared in this scope
    5 |     ll n,m; cin >> n >> m;
      |     ^~
a.cc:5:20: error: 'n' was not declared in this scope; did you mean 'yn'?
    5 |     ll n,m; cin >> n >> m;
      |                    ^
      |                    yn
a.cc:5:25: error: 'm' was not declared in this scope; did you mean 'tm'?
    5 |     ll n,m; cin >> n >> m;
      |                         ^
      |                         tm
a.cc:7:7: error: expected ';' before 'ans'
    7 |     ll ans = 0;
      |       ^~~~
      |       ;
a.cc:8:26: error: 'ans' was not declared in this scope; did you mean 'abs'?
    8 |     if(n == 1 && m == 1) ans = 1; // 0次元
      |                          ^~~
      |                          abs
a.cc:9:31: error: 'ans' was not declared in this scope; did you mean 'abs'?
    9 |     else if(n == 1 || m == 1) ans = n * m - 2; // 1次元
      |                               ^~~
      |                               abs
a.cc:10:10: error: 'ans' was not declared in this scope; did you mean 'abs'?
   10 |     else ans = n * m  - (n + m) * 2  + 4; // 2次元
      |          ^~~
      |          abs
a.cc:11:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   11 |     cout << ans << endl;
      |             ^~~
      |             abs
Language: Java

public class Main {public static void main(String[] args) throws IOException{BufferedReader br = new BufferedReader(new InputStreamReader(System.in));String[] tmp = br.readLine().split(" "); int N = Integer.parseInt(tmp[0]);int M = Integer.parseInt(tmp[1]);if(N == 1||M == 1)System.out.println(N*M-2);else System.out.println(N*M - 2*(N+M-2));}}

Compiler output:
Main.java:1: error: cannot find symbol
public class Main {public static void main(String[] args) throws IOException{BufferedReader br = new BufferedReader(new InputStreamReader(System.in));String[] tmp = br.readLine().split(" "); int N = Integer.parseInt(tmp[0]);int M = Integer.parseInt(tmp[1]);if(N == 1||M == 1)System.out.println(N*M-2);else System.out.println(N*M - 2*(N+M-2));}}
                                                                 ^
  symbol:   class IOException
  location: class Main
Main.java:1: error: cannot find symbol
public class Main {public static void main(String[] args) throws IOException{BufferedReader br = new BufferedReader(new InputStreamReader(System.in));String[] tmp = br.readLine().split(" "); int N = Integer.parseInt(tmp[0]);int M = Integer.parseInt(tmp[1]);if(N == 1||M == 1)System.out.println(N*M-2);else System.out.println(N*M - 2*(N+M-2));}}
                                                                             ^
  symbol:   class BufferedReader
  location: class Main
Main.java:1: error: cannot find symbol
public class Main {public static void main(String[] args) throws IOException{BufferedReader br = new BufferedReader(new InputStreamReader(System.in));String[] tmp = br.readLine().split(" "); int N = Integer.parseInt(tmp[0]);int M = Integer.parseInt(tmp[1]);if(N == 1||M == 1)System.out.println(N*M-2);else System.out.println(N*M - 2*(N+M-2));}}
                                                                                                     ^
  symbol:   class BufferedReader
  location: class Main
Main.java:1: error: cannot find symbol
public class Main {public static void main(String[] args) throws IOException{BufferedReader br = new BufferedReader(new InputStreamReader(System.in));String[] tmp = br.readLine().split(" "); int N = Integer.parseInt(tmp[0]);int M = Integer.parseInt(tmp[1]);if(N == 1||M == 1)System.out.println(N*M-2);else System.out.println(N*M - 2*(N+M-2));}}
                                                                                                                        ^
  symbol:   class InputStreamReader
  location: class Main
4 errors
Language: C++

using namespace std;

int main(){
    long long int n, m;
    cin >> n >> m;
    if(n == 1){
        if(m == 1){
            cout << 1;
        }
        cout << m - 2;
    }
    else{
        if(m == 1){
            //cout << n - 2;
        }else{
             cout << (m - 2) * (n - 2);
        }
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope
    5 |     cin >> n >> m;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:8:13: error: 'cout' was not declared in this scope
    8 |             cout << 1;
      |             ^~~~
a.cc:8:13: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:10:9: error: 'cout' was not declared in this scope
   10 |         cout << m - 2;
      |         ^~~~
a.cc:10:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:16:14: error: 'cout' was not declared in this scope
   16 |              cout << (m - 2) * (n - 2);
      |              ^~~~
a.cc:16:14: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:18:6: error: expected '}' at end of input
   18 |     }
      |      ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<pii, int> ppiii;

void solve() {
  int a, b;
  cin >> a >> b;
  if(a > b) swap(a, b);
  if(a == 1) {
    cout << max(0, b-2) << endl;
    break;
  }
  cout << (a-2LL) * (b-2LL) << endl;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  solve();
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:15:5: error: break statement not within loop or switch
   15 |     break;
      |     ^~~~~
Language: C++

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

int main()
{
    int n,m;
    cin >> n >> m;
    if(n > 1){
        n -= 2;
    }
    if(m > 1){
        m -= 2;
    }
    long long ans = n * m
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: expected ',' or ';' before 'cout'
   15 |     cout << ans << endl;
      |     ^~~~