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

#include<bits/stdc++.h>
#define 10^9+7 MOD
using namespace std;

int main(){
	int n,k;
  	cin>>n>>k;
  	if(n==1){
    	cout<<1;
      	return 0;
    }
  	int sum = 0;
  	while(n+1>k){
    	int x = n+1;
      	int den = 1;
      	for(int i=0;i<k;i++){
        	den*=x;
          	x-=1;
        }
      	int num = 1;
      	for(int i=1;i<=k;i++){
        	num*=i;
        }
      	sum+=(den/num);
      	k++;
    }
  	sum = sum - (n-2) + 1;
  	sum%=MOD;
  	cout<<sum;
  	return 0;
}

Compiler output:
a.cc:2:9: error: macro names must be identifiers
    2 | #define 10^9+7 MOD
      |         ^~
a.cc: In function 'int main()':
a.cc:28:14: error: 'MOD' was not declared in this scope
   28 |         sum%=MOD;
      |              ^~~
Language: C

#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
template<typename T> bool chmax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<typename T> bool chmin(T &a,T b){if(a>b){a=b;return true;}return false;}
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define all(vec) vec.begin(),vec.end()
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef tuple<ll,ll,ll> tlll;
typedef tuple<int,int,int> tiii;
const ll mod=1e9+7;
const int inf=1<<30;

int main(){
  ll n,k; cin >> n >> k;
  ll ans=0;
  for(ll i=k;i<=n+1;i++){
    ans+=(n-i+1)*i+1;
    ans%=mod;
  }
  cout << ans << endl;
  
}

Compiler output:
main.c:2:10: fatal error: bits/stdc++.h: No such file or directory
    2 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

const int mod = 1e9 + 7;
int main()
{
	long long n, k;
	scanf_s("%lld%lld", &n, &k);
	long long  cnt = 0;
	for (int i = k; i <= n; i++)
	{
		cnt += (n - i + 1 + n)*i / 2 - (i - 1)*i / 2 + 1;
		cnt %= mod;
	}
	cnt++;
	cnt %= mod;
	printf("%lld\n", cnt);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
   10 |         scanf_s("%lld%lld", &n, &k);
      |         ^~~~~~~
      |         scanf
Language: C

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

#define MOD 1000000007

int main() {
  int N, K;
  cin >> N >> K;

  vector<long long> n(N + 1);
  for (int i = 0; i <= N; ++i) {
    n[i] = i;
  }
  for (int i = 0; i < N; ++i) {
    n[i + 1] += n[i];
  }

  long long ans = 0;
  for (int k = K; k <= N + 1; ++k) {
    ans = (ans + (N - k + 1 + N) * k / 2 - (k - 1) * k / 2 + 1) % MOD;
  }

  cout << ans << endl;
}

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

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

const int mod = 1e9 + 7;
int main()
{
	long long n, k;
	scanf_s("%lld%lld", &n, &k);
	long long  cnt = 0;
	for (int i = k; i <= n; i++)
	{
		cnt += (n - i + 1 + n)*i / 2 - (i - 1)*i / 2 + 1;
		cnt %= mod;
	}
	cnt++;
	cnt %= mod;
	printf("%lld\n", cnt);
}

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

#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < n; i++)
#define All(V) V.begin(), V.end()
typedef long long int ll;
typedef pair<int, int> P;
const ll MOD = 1e9+7, INF = 1e9;

int main()
{
  ll n, k; cin >> n >> k;
  ll ans = 0;
  for(ll i = k; i <= n+1; i++){
    ll a = n*(n+1)/2;
    ll b = (n-i)*(n-i+1)/2;
    ll c = (i-1)*i/2;
    ans += (a-b) - c + 1;
    ans %= MOD;
  }
  cout << ans << endl;
  system("pause");
}


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

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb(x) push_back(x)
#define vi vector<int>
#define vs vector<string>
#define vll vector<long long>
#define vc vector<char>
#define vs vector<string>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pil pair<int, long long>
#define pli pair<long long, int>
#define pcc pair<char, char>
#define pdd pair<double, double>
#define mll map<long long, long long>
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(), (v).end()
#define flsh fflush(stdout)
#define gcd __gcd
#define clr(x) memset(x, 0, sizeof(x))
#define mod 1000000007LL
#define INF 1000000000007
 

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;


// void solve()
// {
//     ll r;
//     cin>>r;
//     // cout<<r<<"\n";
//     ld ans=2.0*3.14159*r;
//     cout<<ans<<"\n"; 
// }

// void solve()
// {
//     ll n,m;
//     cin>>m>>n;
//     ll i;
//     ll a[n];
//     ll sum=0;
//     for(i=0;i<n;i++)
//     {
//         cin>>a[i];
//         sum+=a[i];
//     }
//     if(sum>m)
//     {
//         cout<<"-1\n";
//     }
//     else{
//         cout<<m-sum<<"\n";
//     }
// }


// void solve()
// {
//    ll n;
//    cin>>n;
//    vll v[n];
//    ll i;
//    ll x,y;
//    for(i=0;i<n-1;i++)
//    {
//        cin>>x;
//        x--;
//        v[x].pb(i);
//    }

//    for(auto it:v)
//    {
//        cout<<sz(it)<<"\n";
//    }
// }

void solve()
{
    ll n,k;
    cin>>n>>k;
    ll i;
    ll suf[n+2];
    suf[n+1]=0;
    for(i=n;i>=0;i--)
    {
        if(i==n)suf[i]=i;
        else{
           suf[i]=suf[i+1]+i;
        }
    }
    ll maxi=0;
    ll res=0;
    for(i=k;i<=n+1;i++)
    {
        ll no=suf[n+1-i];
        ll minsum=(i*(i-1))/2;
        // cout<<i<<" "<<no<<" "<<minsum<<"\n";
        res+=no-minsum+1;
        res%=mod;
        // maxi=max(maxi,)
    }
    cout<<res%mod<<"\n";
}


int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);


if (fopen("input.txt","r" ))
  {
     freopen("input.txt", "r", stdin);
     freopen("output.txt", "w", stdout);
  }
cout<<setprecision(20);


ll t=1;


// cin>>t;


while(t--)
{
solve();
} 


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

#define _USE_MATH_DEFINES
#include <math.h>
#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <algorithm>
#include <numeric>

using namespace std;
typedef long long ll;

#define rep(i, n) for(ll i = 0; i < (ll)(n); i++)

int main() {

    ll mod = 1000000007;
    ll N,K;
    cin >> N >> K;
    ll out = 0;
    for(ll i=K;i<=N+1;i++){
        ll min = (i*(i-1)/2)%mod;
        ll max = ((N+N-i+1)*i/2)%mod;
        out += (max-min+1)%mod;
    }
    cout << out%mod << endl;
    return 0;
}


Compiler output:
main.c:3:10: fatal error: iostream: No such file or directory
    3 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C

#include<bits/stdc++.h>
using namespace std;
#define rep(i,x) for(long long i=0; i<x;i++)
#define mod 1000000007
#define INF 10000000000
typedef long long ll;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }


int main(){
  ios::sync_with_stdio(false);
  
  ll N,K;
  cin>>N>>K;
  ll ans=0;
  
  for(ll i = K; i<N+2;i++){
  	ans= (ans + (i*(N-i+1)+1 ) ) %mod;
  }
	
  cout<<ans % mod;
  
}

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

#include <iostream>
#include <vector>

using namespace std;

const long long int MOD=1e9+7;

int main() {
    int N, K;
    cin >> N >> K;
    vector<long long int> vec(N+2, 0);
    for(int n=1; n<=N; n++) {
        vec[n+1] = n+vec[n];
    }
    long long int ans=0;
    for(int k=K; k<=N+1; k++) {
        ans += ((vec[N+1]-vec[N+1-k])-(vec[k]-vec[0])+1)%MOD;
        ans %= MOD;
    }
    cout << ans << endl;
    

    return 0;
    
}

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

#include <bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
int main(){
    int n,k,ans=0;
    cin>>n>>k;
    for(int i=k;i<n+2;i++;)ans=(ans+i*(n-i+1)+1)%mod;
    cout<<ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:26: error: expected ')' before ';' token
    7 |     for(int i=k;i<n+2;i++;)ans=(ans+i*(n-i+1)+1)%mod;
      |        ~                 ^
      |                          )
a.cc:7:27: error: expected primary-expression before ')' token
    7 |     for(int i=k;i<n+2;i++;)ans=(ans+i*(n-i+1)+1)%mod;
      |                           ^
Language: C

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i<n; i++)
#define PI 3.14159265359
#define INF 1000100100
#define MOD 1000000007
#define all(x) (x).begin(),(x).end()
typedef long long ll;
#define P pair<ll, ll>
using namespace std;

// auto mod int
// https://youtu.be/L8grWxBlIZ4?t=9858
// https://youtu.be/ERZuLAxZffQ?t=4807 : optimize
// https://youtu.be/8uowVvQ_-Mo?t=1329 : division

const int mod = 1000000007;
struct mint {
  ll x; // typedef long long ll;
  mint(ll x=0):x((x%mod+mod)%mod){}
  mint& operator+=(const mint a) {
    if ((x += a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator-=(const mint a) {
    if ((x += mod-a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator*=(const mint a) {
    (x *= a.x) %= mod;
    return *this;
  }
  mint operator+(const mint a) const {
    mint res(*this);
    return res+=a;
  }
  mint operator-(const mint a) const {
    mint res(*this);
    return res-=a;
  }
  mint operator*(const mint a) const {
    mint res(*this);
    return res*=a;
  }
  mint pow(ll t) const {
    if (!t) return 1;
    mint a = pow(t>>1);
    a *= a;
    if (t&1) a *= *this;
    return a;
  }

  // for prime mod
  mint inv() const {
    return pow(mod-2);
  }
  mint& operator/=(const mint a) {
    return (*this) *= a.inv();
  }
  mint operator/(const mint a) const {
    mint res(*this);
    return res/=a;
  }
};
// 出力は.xで！！！！

int main(){
  int n,k; cin >> n >> k;
  mint ans=0;
  vector<mint> sums(n+2);
  sums[0]=sums[1]=0;
  rep(i,n) sums[i+2]=sums[i+1]+i+1;
  for(int i=n+1; i>=k; i--) ans+=sums[n+1]-sums[n+1-i]-sums[i]+1;
  cout << ans.x << 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

#include<bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
int main()
{
	long long n,k;
	cin>>n>>k;
	long long ans=0;
	long long q=0;
	for(long long i=k;i<=n+1;i++)
	{
		q=((i*n)%mod-(i-1)*i%mod)%mod;
		ans=(ans+q+1)%mod;
	}
	cout<<ans<<endl;
	return 0;
}

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

#include<bits/stdc++.h> 
//#define <- プログラムの文字列を置換する
//typedef <- 新しい型に名前を付けるためのキーワード

using namespace std;

#define MAX_N 1
#define INF 1000000000 //1e9
#define PI 3.14159265359
#define mod 1000000007

int main(){
    long long N,K;
    cin >> N >> K;
    long long res = 0;
    for(int i = K; i <= N+1; i++){
        long long temp = i*(N-i+1)+1;
        res += temp % mod ;
        res %= mod;
    }
    cout << res << endl;
    return 0;
}

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

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

int main() {
  int N, K, memo, answer;
  cin >> N >> K;
  answer = 0;
    for (int i = K; i <= N + 1; i++) {
    memo = N*i - i*i + i + 1;
    answer += memo % 1000000007;
    }
  cout << answer << endl;
}


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

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

int main() {
	ll N, K;
	cin >> N >> K;
	ll ans = 0;
	const ll mod = 1000000007;
	for (ll k = K; k <= N + 1; ++k) {
		(ans += k * (N - k + 1) + 1) %= mod;
	}
	cout << ans << endl;
}

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++

#include<iostream>
using namespace std;
int main()
{
 long long int n,k;
 cin>>n>>k;
 n=n*(n+1)/2;
 n=n-k*(k-1)/2;
  n=n%(1e9+7);
  cout<<n<<"\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:6: error: invalid operands of types 'long long int' and 'double' to binary 'operator%'
    9 |   n=n%(1e9+7);
      |     ~^~~~~~~~
      |     |     |
      |     |     double
      |     long long int
Language: C

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define hell  1000000007
#define ios ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define pb   push_back

int main()
{
	ios;
	ll n,k,sum=0;
	cin>>n>>k;
	for(ll i=k;i<=n+1;i++)
	{
		sum+=(i*((2*n)-i+1))/2-((i*(i-1))/2)+1;
	}
	cout<<sum%hell;
}

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

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
#define forinc(i,a,b) for(int i=a;i<=b;i++)
#define fordec(i,a,b) for(int i=a;i>=b;i--)
#define pii pair<int,int>
#define fi first
#define se second

const int mod=1e9+7;
int n,k,ret;
int get(int u,int v){
    int z=v-u+1;
    return (u+v)*z/2;
}
int sum(int A) { return get(0,A-1);}
int sum1(int A) {return get(n-A+1,n);}
main()
{
    cin>>n>>k;
    forinc(i,k,n+1){
        int A=sum(i),B=sum1(i);
        //cout<<A<<" "<<B<<"\n";
        ret=(ret+(B-A+1+mod)%mod)%mod;
    }
    cout<<ret;
}


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

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

int main() {
  long long n,k,ans=0;
  cin>>n>>k;
  for(int i=k;i<n+2;i++){
    ans=(ans+i*(n-i+1)+1)%1000000007;
  }
  cout<<ans<<endl;
}


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

from math import factorial
N, K = map(int, input().split())

ans = 0
for i in range(K, N + 2):
    # print(i)

    tmp_min = (i - 1) * i / 2
    tmp_max = (N * (N + 1) / 2) - ((N - i) * (N - i + 1) / 2)
    # print(tmp_min, tmp_max)

    tmp = tmp_max - tmp_min + 1
    ans += tmp

print(int(ans % (10**9+7)))

Compiler output:
main.c:1:1: error: unknown type name 'from'
    1 | from math import factorial
      | ^~~~
main.c:1:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'import'
    1 | from math import factorial
      |           ^~~~~~
main.c:1:11: error: unknown type name 'import'
main.c:6:7: error: invalid preprocessing directive #print
    6 |     # print(i)
      |       ^~~~~
main.c:10:7: error: invalid preprocessing directive #print
   10 |     # print(tmp_min, tmp_max)
      |       ^~~~~
Language: C

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

const int mod = 1e9 + 7;
long long calc(long long a, long long b, long long p)
{
	if (b == 0) return 1;
	if (b % 2 == 0)
	{
		long long d = calc(a, b / 2, p);
		return (d * d) % p;
	}
	else
		return (a * calc(a, b - 1, p)) % p;
}
signed main(void)
{
	long long n, k;
	cin >> n >> k;
	long long sum[n + 1], ans;
	int l, r;
	ans = 0;
	rep(i, n + 1) sum[i] = i;
	rep(i, n) sum[i + 1] += sum[i];
	for(int i = k; i <= n + 1; i++)
	{
		if (n - i >= 0)
			ans += (sum[n] - sum[n - i]) - sum[i - 1];
		ans += 1;
		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

#include <bits/stdc++.h>
using namespace std;
#define mod ((long long)(1e9 + 7))

int main(void) {
  long long N, K;
  cin >> N >> K;
  long long ans = 0;
  for (int i = K; i <= N + 1; i++) {
    ans += (i * (N - i + 1)) + 1;
    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

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <stdio.h>
#include <cmath>
#include <cctype>
#include <map>

const int INT_INF = 1000000000;                 // 10^9
const long long LONG_INF = 1000000000000000000; // 10^18
const long long MOD = 1000000007;

using namespace std;

int main()
{
    int n, k;
    cin >> n >> k;

    long long ans = 0;
    for (long long i = k; i <= n + 1; i++)
    {
        long long min = (i - 1) * i / 2;
        long long max = (2 * n - i + 1) * i / 2;
        ans += max - min + 1;
        ans %= MOD;
    }

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

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

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

signed main(){
  int N,K;
  cin>>N>>K;
  int ans=0,upr=0,low=0,MOD=1e9+7;
  for(int i=K;i<N+2;i++){
    low=(i-1)*i/2;
    upr=(2*N-i+1)*i/2;
    ans=ans+(upr-low+1);
  }
  cout<<ans%MOD<<endl;
}

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

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

int main(){
  const int64_t mod=1e9+7;
  int N,K;
  cin >> N >> K;
  vector<int64_t> sum(N+2);
  sum.at(0)=0;
  for(int i=1;i<=N+1;i++){
    sum.at(i)=i-1+sum.at(i-1);
  }
  int64_t ans=0;
  for(int i=K;i<=N+1;i++){
    ans+=(sum.at(N+1)-sum.at(N+1-i))-(sum.at(i)-sum.at(0))+1;
    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

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

#define fast_io ios_base::sync_with_stdio(false); cin.tie(nullptr)
#define rep(i, x, y) for(decltype(y) i = (x) - ((x) > (y)); i != (y) - ((x) > (y)); i += 1 - 2 * ((x) > (y)))
#define trav(i,a) for(auto& (i) : (a))
#define all(a) (a).begin(),(a).end()
#define sz(a) int((a).size())
#define clr(a,x) memset((a),(x),sizeof(a)) // array (0,-1)
#define dbg(x) cerr << "STDERR => " << __LINE__ << ": " << #x << " = " << (x) << "  :(\n";
#define pb push_back
#define mp make_pair
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
inline void cpuTime() { cerr << "cpu time : " << double(clock())/CLOCKS_PER_SEC << "\n"; return; }
using ll = long long;
using ull = unsigned long long;
using F = float;
using D = double;
using vi = vector<int>;
using pii = pair<int,int>;
#define MOD 1000000007


void solve(){

    int n, k;
    cin >> n >> k;

    ++n;
    vector<vector<ull>> c(n+1);

    c[0].pb(1);
    c[1].pb(1), c[1].pb(1);

    rep(i,2,n+1){
        c[i].pb(1);
        rep(j,1,i){
            c[i].pb((c[i-1][j-1]+c[i-1][j])%MOD);
        }
        c[i].pb(1);
    }

    ull ans = c[n][k];
    for(int i = k+1; i < n; ++i) { ans += c[n][i]; ans %= MOD; }

    cout << ans << "\n";
    return;
}

/*
 read the question carefully ( what're the exact constraints? )
 look out for SPECIAL CASES (n=1?) and OVERFLOW (ll vs int?) ARRAY OUT OF BOUNDS
 Check datatypes
*/
int main(){

    fast_io;
    int t=1;
    // cin >> t;

    while(t--){
        solve();
    }

    cpuTime();
return 0;
}


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

#include <iostream>
#include <vector>
#define MOD 1e9+7
using namespace std;

int main() {
    int N, K, i;
    uint64_t ans = 0;
    cin >> N >> K;
    for(i=K; i<=N+1; i++) {
        ans += (i*(N-i+1)+1);
        ans %= (uint64_t)MOD;
    }
    cout << ans;
}

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

#pragma GCC target("avx512f,avx512dq,avx512cd,avx512bw,avx512vl")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
using namespace std;
#define MOD 1000000007
long myplus(long s){
  return s-1+((s==1)?0:myplus(s-1));
}
long myminus(long s,long k){
  return s+((k==1)?0:myminus(s-1,k-1));
}
long long func(long N,long K,long pl){
  int n = myminus(N,K)-pl;
  static long long As = 0;
  As += n+1;
  As %= MOD
  (n)?func(N,K+1,pl+K):0;
  return As;
}
int main(){
  int N, K;
  cin >> N >> K;
  long long As = ((K-N-1)?func(N,K,myplus(K)):1);
  As += (As>0)?MOD:0;
  cout << As%MOD;
}

Compiler output:
a.cc: In function 'long long int func(long int, long int, long int)':
a.cc:18:3: error: expression cannot be used as a function
   18 |   (n)?func(N,K+1,pl+K):0;
      |   ^
Language: C++

#pragma GCC target("avx512f,avx512dq,avx512cd,avx512bw,avx512vl")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
using namespace std;
#define MOD 1000000007
long myplus(long s){
  return s-1+((s==1)?0:myplus(s-1));
}
long myminus(long s,long k){
  return s+((k==1)?0:myminus(s-1,k-1));
}
long long func(long N,long K,long pl){
  int n = myminus(N,K)-pl;
  static long long As = 0;
  As += n+1;
  As %= MOD
  (n)?func(N,K+1,pl+K):0;
  return As;
}
int main(){
  int N, K;
  cin >> N >> K;
  long long As = ((K-N-1)?func(N,K,myplus(K)):1);
  cout << As%MOD;
}

Compiler output:
a.cc: In function 'long long int func(long int, long int, long int)':
a.cc:18:3: error: expression cannot be used as a function
   18 |   (n)?func(N,K+1,pl+K):0;
      |   ^
Language: C++

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

typedef long long ll;
typedef vector<long long> vll;
typedef vector<int> vi;
typedef pair<int, int> pi;

#define yes "Yes"
#define yse "Yes"
#define no "No"

#define pb push_back
#define mp make_pair

#define NIL -1

#define list_itr list<ll>::iterator

#define rep(i, l, n) for (int i = (l); i < (n); i++)
#define rep_cs(i, l, n) for (int i = (l); i <= (n); i++)
#define rep_d(j, n) for (int j = n; j >= 0; j--)
#define rep_d_op(j, n, a) for (int j = n; j >= a; j--)

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 int MOD = 1000000007;
const vector<int> dx = {1, 0};
const vector<int> dy = {0, 1};
const ll INF = 1LL << 60;

// int max = *std::max_element(v.begin(), v.end());
// int sum = accumulate(v, v + v.size(), 0);

int GCD(int a, int b) { return b ? GCD(b, a % b) : a; }

bool binary_search(int a[], int n, int key)
{
    int l = 0;
    int r = n;
    int middle;
    while (l < r)
    {
        middle = (l + r) / 2;
        if (key == a[middle])
        {
            return true;
        }

        if (key > a[middle])
        {
            l = middle + 1;
        }
        else if (key < a[middle])
        {
            r = middle;
        }
    }
    return false;
}

// const int MAX = 510000;
// long long fac[MAX], finv[MAX], inv[MAX];

void com_init()
{
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for (int i = 2; i < MAX; i++)
    {
        fac[i] = fac[i - 1] * i % MOD;
        inv[i] = MOD - inv[MOD % i] * (MOD / i) % MOD;
        finv[i] = finv[i - 1] * inv[i] % MOD;
    }
}

long long combination(int n, int k)
{
    if (n < k)
        return 0;
    if (n < 0 || k < 0)
        return 0;
    return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD;
}

int main()
{
    ll n, k;
    cin >> n >> k;
    ll ans = 0;
    for (ll i = k; i <= n + 1; i++)
    {
        ll f = i * (i - 1) / 2;
        ll fin = (n * 2 - i + 1) * i / 2;
        ll add = fin - f + 1;
        ans = (ans + add) % MOD;
    }
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'void com_init()':
a.cc:86:5: error: 'fac' was not declared in this scope
   86 |     fac[0] = fac[1] = 1;
      |     ^~~
a.cc:87:5: error: 'finv' was not declared in this scope
   87 |     finv[0] = finv[1] = 1;
      |     ^~~~
a.cc:88:5: error: 'inv' was not declared in this scope; did you mean 'int'?
   88 |     inv[1] = 1;
      |     ^~~
      |     int
a.cc:89:25: error: 'MAX' was not declared in this scope
   89 |     for (int i = 2; i < MAX; i++)
      |                         ^~~
a.cc: In function 'long long int combination(int, int)':
a.cc:103:12: error: 'fac' was not declared in this scope
  103 |     return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD;
      |            ^~~
a.cc:103:22: error: 'finv' was not declared in this scope
  103 |     return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD;
      |                      ^~~~
Language: C

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

#define ll long long
ll mod = 1000000007;

int main(){

    ios::sync_with_stdio(false);
    cin.tie(0);
    
    ll n, k;
    cin >> n >> k;
    n=n+1;
    if(n==k) cout << 1 << "\n";
    else {
        ll sum=0;
        ll count=n;
        for(int i=0; i<=n; i++){
            if(i>=k-1){
                if(i==0) sum+=(count%mod);
                else sum+= ((count%mod)*(i%mod))%mod;
            }
            count--;
        }
        cout << sum << "\n";
    }

    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

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)n; ++i)
#define repi(i, a, b) for (int i = int(a); i < int(b); ++i)
#define repr(i, n) for (int i = (int)n - 1; i >= 0; --i)
#define ALL(a) (a).begin(), (a).end()
const ll mod = 1e9 + 7;

int main() {
  ll n, k, ans = 0;
  cin >> n >> k;
  for (; k <= n + 1; ++k) {
    ll max = ((n + 1) + (n + 1 - k + 1)) * k / 2;
    ll min = k * (k + 1) / 2 - 1;
    ans += max - min;
    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

#include "bits/stdc++.h"
#define int long long
#define FOR(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define ALL(obj) begin(obj), end(obj)
#define MAX(x) *max_element(ALL(x))
#define MIN(x) *min_element(ALL(x))
#define sqr(x) (x) * (x)
#define cube(x) (z) * (z) * (x)
#define LOWER_BOUND(A, key) distance(A.begin(), lower_bound(ALL(A), key))
#define UPPER_BOUND(A, key) distance(A.begin(), upper_bound(ALL(A), key))
#define itn int

using namespace std;
using ll      = long long;
const int MOD = (int)(1e9 + 7);
const int INF = (int)(1e13 + 7);

template <class T = int>
int in() {
  T x;
  cin >> x;
  return x;
}
int sum(int N) {
  int p = (N * (N + 1) / 2) % MOD;
  return (N * (N + 1) / 2);
}
signed main() {
  int N, K;
  cin >> N >> K;
  int ans = 0;
  FOR(i, K, N + 2) {
    ans -= sum(i - 1);
    ans += sum(N);
    ans -= sum(N - i);
    ans += 1;
    ans %= MOD;
  }
  cout << ans << endl;
}

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

#include<stdio.h>
#include<iostream>
using namespace std;


int main(){
  long long mod =	1e9+7;
  long long N, K; cin>>N>>K;
  long long ans=0, big=0, small=0;
  int i,j;

  for(i=0; i<N-K+2; i++){
    ans = ans+(N-K-i+1)*(K+i)+1;
  }

  ans=ans%mod;
  printf("%lld\n",ans);

  return 0;
}


Compiler output:
main.c:2:9: fatal error: iostream: No such file or directory
    2 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>

using namespace std;

#define f first
#define s second
#define pb push_back
#define mp make_pair
#define all(v) v.begin(), v.end()
#define sz(v) (int)v.size()

#define MOO(i, a, b) for (int i=a; i<b; i++)
#define M00(i, a) for (int i=0; i<a; i++)
#define MOOd(i,a,b) for (int i = (b)-1; i >= a; i--)
#define M00d(i,a) for (int i = (a)-1; i >= 0; i--)

#define FAST ios::sync_with_stdio(0); cin.tie(0);
#define finish(x) return cout << x << '\n', 0;
#define _<< " _ " <<

typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int,int> pi;
typedef pair<ld,ld> pd;
typedef vector<ll> vll;
typedef pair<ll,ll> pll;

const ll MOD = 1e9+7;

int main() { FAST
	mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ll n, k;
	ll ans = 0;
	cin >> n >> k;

	//0 to n
	for(int i = k; i <= n+1; i++) {
		ll bot = 0, top = 0;
		bot = ((i-1) * i) / 2;
		top = bot + (i * (n - (i-1)));
		ans += top - bot + 1;
		ans %= MOD;
	}
	finish(ans);
}


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

#import<iostream>
long n,k,a;main(){for(std::cin>>n>>k;k<n+2;)a+=1-(k+~n)*k++;std::cout<<a%(n=1e9+7);}

Compiler output:
main.c:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated]
    1 | #import<iostream>
      |  ^~~~~~
main.c:1:8: fatal error: iostream: No such file or directory
    1 | #import<iostream>
      |        ^~~~~~~~~~
compilation terminated.
Language: C

//** aman**/
#include<bits/stdc++.h>
#define ll          long long
#define pb          push_back
#define pii         pair<int,int>
#define vi          vector<int>
#define all(a)      (a).begin(),(a).end()
#define F           first
#define S           second
#define dl          double
#define hell        1000000007
#define endl        '\n'
#define rep(i,a,b) for(int i=a;i<b;i++)
#define lb lower_bound
#define ub upper_bound
#define bs          binary_search
#define ios         ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;
int main(){
	ll n,k,sum=0;cin>>n>>k;
	for(ll i=k;i<=n+1;i++){
		sum=(sum+(n*i%hell-(i-1)*i%hell+hell+1)%hell)%hell;
		//cout<<sum<<endl;
	}
	cout<<sum<<endl;
}


Compiler output:
main.c:2:9: fatal error: bits/stdc++.h: No such file or directory
    2 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include "bits/stdc++.h"
 
using namespace std;
 
#define fast_cin() ios_base::sync_with_stdio(false);cin.tie(NULL)
#define rep(i, x, n) for(int i=x; i<n; i++)
#define all(x) x.begin(), x.end()
#define pb push_back
#define eb emplace_back
#define trav(a, x) for(auto& a: x)
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define MOD 1000000007
#define endl '\n'
#define MAX 100002
#define pii pair<int, int>
#define pll pair<long long, long long>
 
typedef vector<int> vec;
typedef long long int ll;
typedef unsigned long long ull;

int main(){
    fast_cin();
    int n, k;cin>>n>>k;
    ll ans=0;
    for(int i=k;i<=n+1;i++){
        ll mi=((i*(i-1))/2);
        ll ma=(i*n-mi);
        ans+=(ma-mi+1)
    }
    cout<<ans%MOD<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:23: error: expected ';' before '}' token
   32 |         ans+=(ma-mi+1)
      |                       ^
      |                       ;
   33 |     }
      |     ~
Language: C

#include<bits/stdc++.h>
using namespace std;
long long a,b,c,d,e,mod=1000000007,i,j,k,pas,n;
long long f(long long q){
	if(q<=1) return 0;
	q--;
	return (q*(q+1)/2);
}
int main(){
	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin>>n>>k;
	for(i=k; i<=n+1; i++){
		pas+=f(n+1)-f(n+1-i)-f(i)+1;
		pas%=mod;
	}
	cout<<pas;
	return 0;
}

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

#include <iostream>

using namespace std;

int main () 
{
  long int n, k, min, max, ans;
  const MOD = 1000000007;
  cin >> n >> k;
  for (int i = k; i <= n; i++) {
  min = (k-1) * k / 2;
  max = (n+1) * n / 2;
  ans += max - min + 1; 
  if (ans >= MOD) ans %= MOD; }
  cout << ans;
 }


Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'MOD' does not name a type
    8 |   const MOD = 1000000007;
      |         ^~~
a.cc:14:14: error: 'MOD' was not declared in this scope
   14 |   if (ans >= MOD) ans %= MOD; }
      |              ^~~
Language: C++


#include <bits/stdc++.h>
using namespace std;
#define _GLIBCXX_DEBUG
const int mod = pow(10,9)+7;
int main() {
    int n,k;
    cin >> n >> k;
    unsigned long long res=n*(n+1)*(n+2)/6-(k-1)*k*(3*n-2*k+4)/6+n-k+2;
    res%=mod
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: expected ';' before 'cout'
   10 |     res%=mod
      |             ^
      |             ;
   11 |   cout << res << endl;
      |   ~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
// memo  fixed  setprecision(20);
using vvll = vector<vector<ll>>;
ll mod =1e9+7;
/*"itob" int to "N"base */           template<typename TypeInt> string itob(const TypeInt v, int base){static const char table[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";string ret;static numeric_limits<TypeInt> t;TypeInt n = v;if (t.is_signed) {if (v < 0) n *= -1;}while (n >= base) {ret += table[n%base];n /= base;}ret += table[n];if (t.is_signed) {if (v < 0 && base == 10) ret += '-';}reverse(ret.begin(), ret.end());return ret;}
/*"chmin" a = MAX*/                  template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
/*"chmax" a = MIN*/                  template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
/*"ctoi"  char to int*/              int ctoi(char c) {return c-'0';}
/*"gcd"   MAX Euclidean */           ll gcd(ll a,ll b){if(b==0)return a; return gcd(b,a%b);}
/*"lcm"   MIN*/                      ll lcm(ll a,ll b){ll g = gcd(a,b);return a/g*b;}
/*"primecheck"If prime,return true.*/bool primecheck(ll n){if(n < 2) return false;else{for(int i = 2; i * i <= n; i++){if(n % i == 0) return false;}return true;}}
string  reverserange(string s,ll a,ll b){reverse(s.begin()+a-1,s.begin()+b); return s;}
int main(){
   int n,k;
   cin >> n >> k;
   ll ans = 0;
   ll d = n*(n+1)/2;
   d%=mod;
   for(int i=k;i<=n+1;i++){
      ll l = i*(i-1)/2;
      l%=mod;
      ll r = (n-i)*(n-i+1)/2;
      r%=mod;
      r = d-r;
      r%=mod;
      ans+=r-l;
      ans%=mod;
      ans++;
      ans%=mod;
   }
   
   cout << ans << endl;
}
    



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

#include <bits/stdc++.h>

using namespace std;

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

#define FOR(i, n, m) for(ll (i)=(m);(i)<(n);++(i))
#define REP(i, n) FOR(i,n,0)
#define OF64 std::setprecision(10)

const ll MOD = 1000000007;
const ll INF = (ll) 1e15;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll N, K;
    cin >> N >> K;

    ll ans = 0;
    for (ll i = K; i <= N + 1; ++i) {
        ll b = i * (i - 1) / 2;
        ll n = (N - i);
        ll t = N * (N + 1) / 2 - n * (n + 1) / 2;

        ans = (ans + t - b + 1) % 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

#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <queue>
#include <utility>
#include <map>
#include <bitset>
#define ll long long
using namespace std;
using p = pair<ll, ll>;
ll dx[2] = {0, 1};
ll dy[2] = {1, 0};

int main(void){
    ll n, k;
    cin >> n >> k;
    ll INF = 1e+9+7;
    vector<ll> sa(n+1, 0);
    vector<ll> sb(n+1, 0);
    sb[0] = n;
    for(ll i = 1; i <= n; i++){
        sa[i] = sa[i-1]+i;
        sb[i] = sb[i-1]+(n-i);
    }
    ll ans = 0;
    for(ll i = 0; i <= n; i++){
        if(i>=k-1){
            ans+=(sb[i]-sa[i]+1);
            ans%=INF;
        }
    }
    cout << ans << endl;
    return 0;
}


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

////基本の者ども
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const int INF =2000000000;
//////forども//////////////////////////////////////////
#define REP(i,n) for(int i = 0; i < int(n); i++)
#define REPR(i,n) for(int i = int(n); i >= 0; i--)
#define FOR(i,m,n) for(int i = int(m); i < int(n); i++)
#define FOREACH(x,a) for(auto& (x) : (a) )
////////////////////////////////////////////////////////////////
//cinおよびcout拡張
#define COUT(x) cout<<(x)<<endl
void CINT(){}
template <class Head,class... Tail>
void CINT(Head&& head,Tail&&... tail){
    cin>>head;
    CINT(move(tail)...);
}
#define CIN(...) int __VA_ARGS__;CINT(__VA_ARGS__)
#define LCIN(...) ll __VA_ARGS__;CINT(__VA_ARGS__)
#define SCIN(...) string __VA_ARGS__;CINT(__VA_ARGS__)
/////////////////////////////////////////////////////////////////
//////あまった
#define MP make_pair
#define ALL(v) v.begin(), v.end()
#define pb(a) push_back(a)
///////////////////////////////////////////////////////////
//あまり
ll gcd(ll a, ll b){
   if (a%b == 0) return b;
   else return gcd(b, a%b);
}
ll lcm(ll a, ll b){	
   return a*b/gcd(a, b);
}
int pow_kai(int a, int n){//aのn乗を計算します。
  int x = 1;
  while(n > 0){//全てのbitが捨てられるまで。
    if(n&1){//1番右のbitが1のとき。
      x = x*a;
    }
    a = a*a;
    n >>= 1;//bit全体を右に1つシフトして一番右を捨てる。
  }
  return x;
}


//メモ
	//vector<vector<要素の型>> 変数名(要素数1, vector<要素の型>(要素数2, 初期値))
	//vector<intなど> 変数名(要素数,初期値)
	//dfsではvector<vector<int>> g(n);で◎
ll fx(ll k){
    return k*(k+1)/2;
}
void Main(){//本処理はココ
	//入力パート
 	//string ;
 	ll  n,k,ans;
 	cin>>n>>k;
 	ans=0;
 	ll full=fx(n);
 	for(k;k<=n+1;k++){
 	ll up=full-fx(n-k);
 	ll down=fx(k-1);
//  	ans-=fx(n-k+1);/-1;
 	  //  ans;
 	  ans+=up-(down-1);
 	  //  cout<<ans<<endl;
 	}
 //答え出力パート
     cout<<ans;
     cout<<endl;
 }
int main(){//ここは前処理のゾーン
    //COMinit();//nCrするならON
    //Prime();//素数ならコレをon//PRIME_MAXとかisPrimeもいじろう
    //string a,b;
    //ll n,a;
    std::cout << std::fixed << std::setprecision(15);//浮動小数点絶対殺すマン
  	Main();
}


Compiler output:
main.c:2:10: fatal error: bits/stdc++.h: No such file or directory
    2 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define REP(i,m,n) for(ll i=m;i<(int)(n);i++)
typedef long long ll;
typedef pair<ll,ll> pint;
 
 
int main(){
    ll n,k;cin>>n>>k;
    ll ans=0;
    ll MOD=1000000007;
    ll a;
    ll b;
    REP(i,k,n+2){
        b=((i-1)*i/2);
        a = n*i-b;
        ans+=a-b+1;
        //cout<<a<<" "<<b<<endl;
        //cout<<ans<<endl;
    }
    cout<<ans%MOD<<endl;
}

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

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mod = 1000000007;

struct mint
{
	ll x;
	mint(ll x = 0) :x((x% mod + mod) % mod) {}
	mint operator-() const { return mint(-x); }
	mint& operator+=(const mint a)
	{
		if ((x += a.x) >= mod) x -= mod;
		return *this;
	}
	mint& operator-=(const mint a)
	{
		if ((x += mod - a.x) >= mod) x -= mod;
		return *this;
	}
	mint& operator*=(const mint a)
	{
		(x *= a.x) %= mod;
		return *this;
	}
	mint operator+(const mint a) const
	{
		mint res(*this);
		return res += a;
	}
	mint operator-(const mint a) const
	{
		mint res(*this);
		return res -= a;
	}
	mint operator*(const mint a) const
	{
		mint res(*this);
		return res *= a;
	}
	mint pow(ll t) const
	{
		if (!t) return 1;
		mint a = pow(t >> 1);
		a *= a;
		if (t & 1) a *= *this;
		return a;
	}

	// for prime mod
	mint inv() const
	{
		return pow(mod - 2);
	}
	mint& operator/=(const mint a)
	{
		return (*this) *= a.inv();
	}
	mint operator/(const mint a) const
	{
		mint res(*this);
		return res /= a;
	}
};
ostream& operator<<(ostream& os, const mint& a)
{
	os << a.x;
	return os;
}

int main()
{
	ll n, k;
	cin >> n >> k;

	mint minv;
	for (ll i = 0; i <= k; i++) minv += i;
	mint maxv;
	for (ll i = n + 1; n + 1 - k < i; i--) maxv += i;
	mint ans = maxv - minv + 1;

	for (ll i = k + 1; i <= n + 1; i++) {
		minv += i;
		maxv += n + 2 - i;
		ans += maxv - minv + 1;
	}
	cout << ans << endl;
}

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

#include<bits/stdc++.h>
#define    ll      unsigned long long int
#define    Fori(a,b) for (ll i = a ; i<b ;i++ )
#define    Forj(a,b) for (ll j = a ; j<b ;j++ )
#define    Fork(a,b) for (ll k = a ; k<b ;k++ )
#define    W       while
#define    pb      push_back
#define    nl      cout<<endl
#define    mod     1000000007
#define    I       cin>>
#define    Out     cout<<
#define    DOD(i)  cout<<setprecision(i)<<fixed<<
#define    XXX     return 0
#define    Fast    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0)
using namespace std;
int main()
{
   Fast;
   ll n,k;I n>>k;
   if(k>n){
       cout<<1<<endl;
   }else{
       ll ans=0;
       for(int i=k;i<=n;i++){
           ll f=k*(k+1)/2;
           ll s=(n+1)*(n+2)/2 - (n-k+1)*(n-k+2)/2;
           ans += s-f+1; 
       }
       cout<<ans%mod<<endl;
   }
   XXX;
}




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

#include <iostream>

using namespace std;

int main () {
  long int a[5] = {0};
  cin >> a[0] >> a[1];
  for (int i = 0; i <= a[0]; i++) {
  a[2] += i; if(a[2] >= 1000000007) a[2] %= 1000000007; }
  for (int i = 0; i < a[1]; i++) {
  a[3] += i; if(a[3] >= 1000000007) a[3] %= 1000000007; }
  a[4] = (a[2] >= a[3] ? (a[2] - a[3] + 1) : (a[3] - a[2] + 1); 
  cout << a[4];
  }


Compiler output:
a.cc: In function 'int main()':
a.cc:12:63: error: expected ')' before ';' token
   12 |   a[4] = (a[2] >= a[3] ? (a[2] - a[3] + 1) : (a[3] - a[2] + 1);
      |          ~                                                    ^
      |                                                               )
Language: C

#include <bits/stdc++.h>

#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define FOR(i,n,m) for(int i=(int)(n); i<=(int)(m); i++)
#define RFOR(i,n,m) for(int i=(int)(n); i>=(int)(m); i--)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define RITR(x,c) for(__typeof(c.rbegin()) x=c.rbegin();x!=c.rend();x++)
#define setp(n) fixed << setprecision(n)

template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }

#define ll long long
#define vll vector<ll>
#define vi vector<int>
#define pll pair<ll,ll>
#define pi pair<int,int>

#define all(a) (a.begin()),(a.end())
#define rall(a) (a.rbegin()),(a.rend())
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define ins insert

using namespace std;

//-------------------------------------------------
//--ModInt
//-------------------------------------------------
const ::std::uint_fast64_t MOD = 1e9+7;

class mint
{
private:
    using value_type = ::std::uint_fast64_t;
    value_type n;
public:
    mint():n(0){}
    mint(::std::int_fast64_t _n):n(_n<0 ? MOD-(-_n)%MOD : _n%MOD){}
    mint(const mint &m):n(m.n){}

    friend ::std::ostream& operator<<(::std::ostream &os, const mint &a){
		return os << a.n;
	}
    friend ::std::istream& operator>>(::std::istream &is, mint &a){
        value_type temp; is>>temp;
        a = mint(temp);
        return is;
    }

    mint& operator+=(const mint &m){n+=m.n; n=(n<MOD)?n:n-MOD; return *this;}
    mint& operator-=(const mint &m){n+=MOD-m.n; n=(n<MOD)?n:n-MOD; return *this;}
    mint& operator*=(const mint &m){n=n*m.n%MOD; return *this;}
    mint& operator/=(const mint &m){return *this*=m.inv();}
    mint& operator++(){return *this+=1;}
    mint& operator--(){return *this-=1;}

    mint operator+(const mint &m) const {return mint(*this)+=m;}
    mint operator-(const mint &m) const {return mint(*this)-=m;}
    mint operator*(const mint &m) const {return mint(*this)*=m;}
    mint operator/(const mint &m) const {return mint(*this)/=m;}
    mint operator++(int){mint t(*this); *this+=1; return t;}
    mint operator--(int){mint t(*this); *this-=1; return t;}

    bool operator==(const mint &m) const {return n==m.n;}
    bool operator!=(const mint &m) const {return n!=m.n;}
    mint operator-() const {return mint(MOD-n);}

    mint pow(value_type b) const {
        mint ret(1), m(*this);
        while(b){
            if (b & 1) ret*=m;
            m*=m;
            b>>=1;
        }
        return ret;
    }

    mint inv() const {return pow(MOD-2);}
};

//-------------------------------------------------

int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n,k; cin>>n>>k;
    mint ans=mint(k-n-2)*(2*k*k-k*(n+2)-n*n-n-6)/6;
    cout<<ans<<"\n";
    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++

#include <iostream>
using namespace std;
int main(){int n,k,a=0;cin>>n>>k;for(int i=k;i<=n+1;i++){a=(a+n*i-(i*(i-1))+1)%(1e9+7);cout<<a;}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:79: error: invalid operands of types 'int' and 'double' to binary 'operator%'
    3 | int main(){int n,k,a=0;cin>>n>>k;for(int i=k;i<=n+1;i++){a=(a+n*i-(i*(i-1))+1)%(1e9+7);cout<<a;}
      |                                                            ~~~~~~~~~~~~~~~~~~~^~~~~~~~
      |                                                                            |       |
      |                                                                            int     double
a.cc:3:97: error: expected '}' at end of input
    3 | int main(){int n,k,a=0;cin>>n>>k;for(int i=k;i<=n+1;i++){a=(a+n*i-(i*(i-1))+1)%(1e9+7);cout<<a;}
      |           ~                                                                                     ^
Language: C++

#include <iostream>
#define MOD 1000000007
using namespace std; 
int main() {
  long n, k; 
  cin >> n >> k; 
  long long compteur = 0;;  
  long long gauche = ((k-1)*(k))/2; 
  long long droite = (k*n) - ((k-1)*(k))/2; 
  for (long l = k; l <= n+1; l++) {
    compteur += (droite-gauche + 1); 
    gauche += l; 
    droite += n - l; 
  }
  cout << compteur % MOD << endl; 
  return 0; 
}#include <iostream>
#define MOD 1000000007
using namespace std; 
int main() {
  long n, k; 
  cin >> n >> k; 
  long long compteur = 0;;  
  long long gauche = ((k-1)*(k))/2; 
  long long droite = (k*n) - ((k-1)*(k))/2; 
  for (long l = k; l <= n+1; l++) {
    compteur += (droite-gauche + 1); 
    gauche += l; 
    droite += n - l; 
  }
  cout << compteur % MOD << endl; 
  return 0; 
}

Compiler output:
a.cc:17:2: error: stray '#' in program
   17 | }#include <iostream>
      |  ^
a.cc:17:3: error: 'include' does not name a type
   17 | }#include <iostream>
      |   ^~~~~~~
a.cc:20:5: error: redefinition of 'int main()'
   20 | int main() {
      |     ^~~~
a.cc:4:5: note: 'int main()' previously defined here
    4 | int main() {
      |     ^~~~