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

#include<bits/stdc++.h>
#define fast ios::sync_with_stdio(false), cin.tie(0);
#define ll long long
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define endl '\n'

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:21:19: error: 'M' was not declared in this scope
   21 |         tp=((n-i)%M*i%M+1)%M;
      |                   ^
Language: C

#include <bits/stdc++.h>
using namespace std;
long tousa(long a,long b){
  return b*(b+1)/2-a*(a-1)/2;
}

int main() {
  long N,K;cin>>N>>K;
  long wa=0;
  long mod=1000000007;
  for(long i=K;i<=N+1;i++){
    long x=tousa(N-i+1,N);
    long y=(i*(i-1)/2);
    //cout<<x<<" "<<y<<endl;
    wa+=(x-y+1)%mod;
    wa%=mod;
  }
  cout<<wa<<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;


	 
int main() {
  	int N,K;
  	cin >> N >>K;
	int answer;
  	answer = ((N+1)*(N^2+2N+6)-(K-1)*(-2*K^2+(4+3*N)*K+6));
  	int a;
  	a = answer / 6;
  	
  	cout << a%(10^9+7) << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:30: error: unable to find numeric literal operator 'operator""N'
   10 |         answer = ((N+1)*(N^2+2N+6)-(K-1)*(-2*K^2+(4+3*N)*K+6));
      |                              ^~
Language: C

/************************************
/ AUTHOR : YATHARTH GOSWAMI         /  
/ ALIAS : hacker_yg                 /
/ INSTITUTE : IIT Kanpur            /
************************************/
//          TEMPLATE                //

#include <bits/stdc++.h>

#define ll long long
#define MOD 1000000007
#define pb push_back
#define mp make_pair
#define F first
#define S second

using namespace std;

int main(){
    ll n = 1e9 + 7;
    ll a, b;
    cin >> a >> b;
    ll ans = 0;
    map <ll, ll> m;
    for (ll i = b; i <= a+1; i++){
        ans += (a*i - i*(i-1) + 1)%n;
    }
    cout << ans%n;
    return 0;
}




Compiler output:
main.c:8:10: fatal error: bits/stdc++.h: No such file or directory
    8 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
long long mod = 1000000000 + 7;

int main () {
    int N, K;
    long long arr[100000*2+1];
    cin >> N >> K;
    long long ans = 0;
    long long total = 0
    for (int i = 0; i < N + 1; i ++ ) {
        total += i;
        arr[i] = total;
    }
    long long tmp;
    for (int i = K; i < N + 1; i++) {
        tmp = arr[N] - arr[N - i] - arr[i - 1] + 1;
        ans = (ans + tmp) % mod;
    }
    cout << (ans + 1) % mod << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: expected ',' or ';' before 'for'
   11 |     for (int i = 0; i < N + 1; i ++ ) {
      |     ^~~
a.cc:11:21: error: 'i' was not declared in this scope
   11 |     for (int i = 0; i < N + 1; i ++ ) {
      |                     ^
Language: C


// Problem : D - Sum of Large Numbers
// Contest : AtCoder - AtCoder Beginner Contest 163
// URL : https://atcoder.jp/contests/abc163/tasks/abc163_d
// Memory Limit : 1024 MB
// Time Limit : 2000 ms
// Powered by CP Editor (https://github.com/cpeditor/cpeditor)


/**         srijan_de
 _____      _ _              ______     
/  ___|    (_|_)             |  _  \    
\ `--. _ __ _ _  __ _ _ __   | | | |___ 
 `--. \ '__| | |/ _` | '_ \  | | | / _ \
/\__/ / |  | | | (_| | | | | | |/ /  __/
\____/|_|  |_| |\__,_|_| |_| |___/ \___|
            _/ |                         
           |__/           23.02.2001     **/
///.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.
#include    <bits/stdc++.h>  
using       namespace       std;
using       lli=            long long  int;
using       ulli=           unsigned long long int;
using       ld=             long double;
#define     mem(a,val)      memset( a,  val,  sizeof(a) )
#define     b_s             binary_search
#define     u_b             upper_bound
#define     l_b             lower_bound
#define     nl              cout<<endl
#define     pb              push_back
#define     pf              push_front
#define     ppb             pop_back
#define     ppf             pop_front
#define     in              insert
#define     fi              first
#define     se              second
#define 	pqueue			priority_queue
const lli   MOD=            (int)1e9 + 7;
const lli   MOD1=           (int)1e9 + 9;
const lli   MOD2=           998244353;
const ld    pi=             atan2(0, -1);
const ld    eps=            1e-9;
lli         tests=          1;
template<class x,class y>x max(x a,y b){return (a>b)?a:b;}
template<class x,class y>x min(x a,y b){return (a<b)?a:b;}
template<class x,class y>x log(x n,y r){return (n>r-1)?1+log(n/r,r):0;}

///.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.
int32_t main() 
{
	auto start = clock();
ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);	

//	cout<<fixed;
//	cout<<scientific;
//	cout<<fixed<<setprecision(12);
	// cin>>tests;
	for(lli test=1;test<=tests;test++) 
	{
//		cout<<"Case #"<<test<<": ";
///.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.
		
		
		lli n,m;
		cin>>n>>m;
		lli a[n+1]={0},b[n+1]={0};
		for(lli i=1;i<=n;i++)
		{
		    a[i]=a[i-1]+i;
		}
		lli ans=0;
		for(lli i=m;i<=n+1;i++)
		{
		    ans+=a[n]-a[n-i]-a[i-1]+1;
		    ans%=MOD;
		}
		
		cout<<ans;
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
///.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.
	}
	cerr<<endl<<endl<<endl<< "Time : " << double(clock() - start) / CLOCKS_PER_SEC <<endl;
	return 0;
}
///.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.


Compiler output:
main.c:20:13: fatal error: bits/stdc++.h: No such file or directory
   20 | #include    <bits/stdc++.h>
      |             ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

int main() {
    long long num, K;
    cin >> num >> K;

    long long sum = 0;
    rep(i, K, num + 2) 
    {
        sum = (sum + (i * (num + 1 - i) + 1)) % 1000000007;
    }
    cout << sum << "\n";
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:41: error: 'repr' was not declared in this scope
    5 | #define rep(i, ...) select(__VA_ARGS__, repr, repn)(i, __VA_ARGS__)
      |                                         ^~~~
a.cc:12:5: note: in expansion of macro 'rep'
   12 |     rep(i, K, num + 2)
      |     ^~~
a.cc:5:47: error: 'repn' was not declared in this scope
    5 | #define rep(i, ...) select(__VA_ARGS__, repr, repn)(i, __VA_ARGS__)
      |                                               ^~~~
a.cc:12:5: note: in expansion of macro 'rep'
   12 |     rep(i, K, num + 2)
      |     ^~~
a.cc:12:9: error: 'i' was not declared in this scope
   12 |     rep(i, K, num + 2)
      |         ^
a.cc:5:53: note: in definition of macro 'rep'
    5 | #define rep(i, ...) select(__VA_ARGS__, repr, repn)(i, __VA_ARGS__)
      |                                                     ^
Language: C++

#include <iostream>
#include <cmath>
using namespace std;
int main(){
    int n, k;
    cin >> n >> k;
    int total=0;
    for(int i=k;i<=n+1;i++){
        total += i*(n-k+1)+1;
    }
    cout << total%(pow(10,9)+7);

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: invalid operands of types 'int' and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   11 |     cout << total%(pow(10,9)+7);
      |             ~~~~~^~~~~~~~~~~~~~
      |             |               |
      |             int             __gnu_cxx::__promote<double>::__type {aka double}
Language: C

#include <iostream>
#include <string>
#include <vector>
#include <list>
#include <set>
#include <algorithm>
#include <unordered_map>

#define rep(i, a, b) for (ll i = a; i < b; i++)

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> pll;
typedef unordered_map<string, ll> u_map;

// input
void input() {}
template <class Head, class... Tail>
void input(Head &&a, Tail &&... b)
{
    cin >> a;
    input(forward<Tail>(b)...);
}

template <class V>
void input(vector<V> &v)
{
    for_each(v.begin(), v.end(), [](auto &i) { input(i); });
}

// output
template <class V>
void output(vector<V> &v)
{
    for_each(v.begin(), v.end(), [](auto &x) { cout << x << " "; });
    cout << endl;
}

// math functions
ll mpow(ll a, ll n, ll p)
{
    ll x = 1;
    while (n > 0)
    {
        if (n & 1)
        {
            x = a * x % p;
        }
        a = a * a % p;
        n >>= 1;
    }

    return x;
}

ll mfact(ll n, ll p)
{
    ll res = 1;
    for (ll i = 2; i <= n; i++)
    {
        res = res * i % p;
    }
    return res;
}

ll mcomb(ll n, ll r, ll p)
{
    if (n == 0 && r == 0)
    {
        return 1;
    }
    if (n < r || n < 0 || r < 0)
    {
        return 0;
    }

    ll a = mfact(n, p);
    ll b = mfact(n - r, p);
    ll c = mfact(r, p);
    return (((a * mpow(b, p - 2, p)) % p) * mpow(c, p - 2, p)) % p;
}

ll gcd(ll a, ll b)
{
    if (a < b)
    {
        a ^= b;
        b ^= a;
        a ^= b;
    }
    return b ? gcd(b, a % b) : a;
}

ll lcm(ll a, ll b)
{
    return a * b / gcd(a, b);
}

int main()
{
    const ll MOD = 1e9 + 7;
    ll N, K;
    input(N, K);
    
    ll res = 0;
    rep(i, K, N+2)
    {
        res = ((res % MOD) + ((i * (N - i + 1) + 1) % MOD)) % MOD;
    }
    
    cout << res << 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>
#define endl '\n'
using namespace std;
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
	int n, k;
	cin >> n >> k;
	int a[n+1];
	int b[n+1];
	a[0]=0;
	for(int i=1; i<n+1; i++){
		a[i]=a[i-1]+i;
	}
	b[0]=n;
	for(int i=1; i<n+1; i++){
		b[i]=b[i-1]+n-i;
	}
	for(int i=0; i<n+1; i++){
		cout << a[i] << " ";
	}
	cout <<endl;
	for(int i=0; i<n+1; i++){
		cout << b[i] << " ";
	}
	long long int sum=0;
	for(int i=k-1; i<=n+1; i++){
		sum=sum+b[i]-a[i]+1;
	}
	cout << endl << sum;
    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;
typedef long long ll;
typedef vector<int> VI;
ll mm=1000000000;ll MM=mm+7;
#define rep(i, n) for(int i=0;i<n;i++)

int main(){
  ll n,k;
  cin >>n >> k;
  ll sum1=0;
  for(ll i=k; i<=n+1;i++){
	sum1+=i*(n-i+1)+1;
    sum1%=MM;
  }  
   cout << sum1 << 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 rep(i,a,b) for(int i=int(a);i<=int(b);++i)
using namespace std;
template<class A>void pr(A a){cout << (a) << endl;}
template<class A,class B>void pr(A a,B b){cout << a << " "  ;pr(b);}
template<class A,class B,class C>void pr(A a,B b,C c){cout << a << " " ;pr(b,c);}
template<class A,class B,class C,class D>void pr(A a,B b,C c,D d){cout << a << " " ;pr(b,c,d);}
typedef long long ll;
typedef pair<ll, ll> l_l;
typedef pair<int, int> i_i;
int INF=numeric_limits<int>::max();
// for(int j=0;j<N;++j) {

ll cnt(ll n,ll x) {
  ll res=0;
  rep(i,0,n) {
    res+=i*(-max(x-i,(ll)0));
    res+=(n-i)*(max(x-i,(ll)0));
  }
  res+=x;
  return res;
}

int main(void) {
  ll MOD=pow(10,9)+7;
  int n,k;cin>>n>>k;
  pr((cnt(n,n+1)-cnt(n,k-1))%MOD);
  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 <cmath>
using namespace std;
int main(){
    int n, k;
    cin >> n >> k;
    int64_t total=0;
    for(int i=k;i<=n+1;i++){
        total += i*(n-k+1)+1;
    }
    cout << total%(pow(10,9)+7);

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: invalid operands of types 'int64_t' {aka 'long int'} and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   11 |     cout << total%(pow(10,9)+7);
      |             ~~~~~^~~~~~~~~~~~~~
      |             |               |
      |             |               __gnu_cxx::__promote<double>::__type {aka double}
      |             int64_t {aka long int}
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i, ...) select(__VA_ARGS__, repr, repn)(i, __VA_ARGS__)

int main() {
    long long num, K;
    cin >> num >> K;

    long long sum = 0;
    rep(i, K, num + 2) 
    {
        sum = (sum + (i * (num + 1 - i) + 1)) % 1000000007;
    }
    cout << sum << "\n";
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:41: error: 'repr' was not declared in this scope; did you mean 'rep'?
    3 | #define rep(i, ...) select(__VA_ARGS__, repr, repn)(i, __VA_ARGS__)
      |                                         ^~~~
a.cc:10:5: note: in expansion of macro 'rep'
   10 |     rep(i, K, num + 2)
      |     ^~~
a.cc:3:47: error: 'repn' was not declared in this scope; did you mean 'rep'?
    3 | #define rep(i, ...) select(__VA_ARGS__, repr, repn)(i, __VA_ARGS__)
      |                                               ^~~~
a.cc:10:5: note: in expansion of macro 'rep'
   10 |     rep(i, K, num + 2)
      |     ^~~
a.cc:10:9: error: 'i' was not declared in this scope
   10 |     rep(i, K, num + 2)
      |         ^
a.cc:3:53: note: in definition of macro 'rep'
    3 | #define rep(i, ...) select(__VA_ARGS__, repr, repn)(i, __VA_ARGS__)
      |                                                     ^
Language: C

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

int facctorialMethod(int k){
    int sum = 1;
    for (int i = 1; i <= k; ++i)
    {
        sum *= i;
    }
    return sum;
}
 
int main() {
  int N,K;
  cin >> N >> K;
  int sum = 0;
  for(int i = 0;i<N-K+2;i++){
    sum += facctorialMethod(N+1)/facctorialMethod(N+1-(K+i))/facctorialMethod(K+i);
  }
  cout << sum << 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 <math.h>
#include <algorithm>
#include <string>
#include <string.h>
#include <queue>
#include <vector>
#include <set>
#include <map>
#include <tuple>
#include <stdlib.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
#define PI 3.14159265358979
typedef long long int ll;

const double pi=3.1415;
ll absc(ll a,ll b){return (a-b>0?a-b:b-a);
}
ll mini(ll a,ll b){return (a>b?b:a);}
ll gcd(ll a,ll b){
	if(a<b)swap(a,b);
	return (a%b?gcd(a%b,b):b);
}
int main()
{
    ll a,b,c,N,K,aa=1000000007;
    string s,t;
    cin>>N>>K;
    vector<ll>ans(N+1);
    ll j=0,k=N,tmp=N*(N-1)/2%aa;
    ll maxi=tmp,mini=tmp;
    for(int i=N;i>=0;i--)
    {
    	ans[i]=maxi-mini+1;
    	maxi-=j;
    	mini-=k;
    	j++;k--;
    }
    ll anss=0;
    for(int i=K-1;i<=N;i++)anss=(ans[i]+anss)%aa;
    cout<<anss;
}


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>
#define _GLIBCXX_DEBUG
#define rep(i,n) for(int i=0;i< (n);i++)
#define rep1(i,n) for(int i=1;i<= (n);i++)
using namespace std;
typedef long long ll;
typedef pair<int,int> P;

const static ll MOD = (1e+9)+7;

int main(){
    ll n,k;cin>>n>>k;
    ll ans = 0;
    ll before_min,before_max;
    for(ll i = 1;i<=n+1;i++){
        if(i == 1){
            if(i >= k){
                ans += n % MOD;
            }
            before_min = 1;
        }else{
            ll min_ = i*(i+1)/2;
            ll max_ = i*(2*n-i+1)/2;
            if(i >= k){
                ans += (max_-min_+1) % MOD;
                ans += max((ll)0,min_-before_min) % MOD;
            }
            before_min = min_;
        }
    }
    cout<<ans%MOD<<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 calcNumOfCombination(int n, int r){
    return factorial(n) / (factorial(r) * factorial(n-r));
  }

int main() {
  int n,k;
  cin >> n >> k;
  int num = calcNumOfCombination(n,k);
  cout << num << endl;
}

Compiler output:
a.cc: In function 'int calcNumOfCombination(int, int)':
a.cc:5:12: error: 'factorial' was not declared in this scope
    5 |     return factorial(n) / (factorial(r) * factorial(n-r));
      |            ^~~~~~~~~
Language: C++

#include<bits/stdc++.h>

using namespace std;

int main(){
  int n,k;
  cin >> n >> k;
  
  double sum=0;
  for(int i=k;i<n+2;i++)
    sum+=i*(n-(i-1))+1;
  
  cout << sum%(10e9+7) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: invalid operands of types 'double' and 'double' to binary 'operator%'
   13 |   cout << sum%(10e9+7) << endl;
      |           ~~~^~~~~~~~~
      |           |        |
      |           double   double
Language: C++

#include <iostream>
#include <math.h>
#include <algorithm>
#include <queue>
#include <map>
#include <list>
//#include <bits/stdc++.h>


using namespace std;

#define FOR(i,a,b) for(int i=(a),i##formax=(b);i<i##formax;i++)
typedef long long ll;

int main(){
    int n,k;
    cin >> n >> k;
    ll ans = 0;
    ll sum = n * (n+1) / 2;
    FOR(i,k,n+2){
        ans += sum - (n-i)*(n-i+1)/2 -  i*(i-1)/2 + 1;
        ans = ans % (pow(10,9) + 7);
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:19: error: invalid operands of types 'll' {aka 'long long int'} and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   22 |         ans = ans % (pow(10,9) + 7);
      |               ~~~ ^ ~~~~~~~~~~~~~~~
      |               |                |
      |               |                __gnu_cxx::__promote<double>::__type {aka double}
      |               ll {aka long long int}
Language: C++

#include<bits/stdc++.h>
using namespace std;
 
int kai(int n){
  if(n==1) return 1;
  else return n * kai(n-1);
}
 
int main() {
  int n, k, c(0);
  cin >> n >> k;
  for(int i(k);i<n+2){
    c += kai(n+1)/(kai(i)*kai(n-i+1));
  }  
  cout << c;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:21: error: expected ';' before ')' token
   12 |   for(int i(k);i<n+2){
      |                     ^
      |                     ;
Language: Java

import java.util.*;
import java.io.PrintWriter;
public class Main {
    final int MAX = 1000; 
    int[] f; 
  
    // Constructor
    public gcdOfFibonacci(){
        // Create an array for memoization 
        f = new int[MAX]; 
    } 
  
    // Returns n'th Fibonacci number using table f[]. 
    // Refer method 6 of below post for details. 
    // https://www.geeksforgeeks.org/program-for-nth-fibonacci-number/ 
    private static int fib(int n) { 
        // Base cases 
        if (n == 0) 
            return 0; 
        if (n == 1 || n == 2) 
            return (f[n] = 1); 
  
        // If fib(n) is already computed 
        if (f[n]!=0) 
            return f[n]; 
  
        int k = ((n & 1)==1)? (n+1)/2 : n/2; 
  
        // Applying recursive formula [Note value n&1 is 1 
        // if n is odd, else 0. 
        f[n] = ((n & 1)==1)? (fib(k)*fib(k) + fib(k-1)*fib(k-1)) 
               : (2*fib(k-1) + fib(k))*fib(k); 
  
        return f[n]; 
    } 
  
    // Function to return gcd of a and b 
    private static int gcd(int M, int N) { 
        if (M == 0) 
            return N; 
        return gcd(N%M, M); 
    } 
  
    // This method returns GCD of Fib(M) and Fib(N) 
    static int findGCDofFibMFibN(int M,  int N) { 
        return fib(gcd(M, N)); 
    } 
  
    // Driver method 
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
        // Returns GCD of Fib(M) and Fib(N) 
        gcdOfFibonacci obj = new gcdOfFibonacci(); 
      int N = sc.nextInt();
      int K = sc.nextInt();
        System.out.println(findGCDofFibMFibN(N, K)); 
    }
}

Compiler output:
Main.java:8: error: invalid method declaration; return type required
    public gcdOfFibonacci(){
           ^
1 error
Language: C

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using P = pair<ll, ll>;
using Graph = vector<vector<ll>>;
#define rep(i, n) for(ll i=0;i<(ll)(n);i++)
#define rep2(i, m, n) for(ll i=m;i<(ll)(n);i++)
#define rrep(i, n, m) for(ll i=n;i>=(ll)(m);i--)
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
const int ddx[8] = {0, 1, 1, 1, 0, -1, -1, -1};
const int ddy[8] = {1, 1, 0, -1, -1, -1, 0, 1};
const ll MOD = 1000000007;
const ll INF = 1000000000000000000L;
#ifdef __DEBUG

/**
 * For DEBUG
 * https://github.com/ta7uw/cpp-pyprint
 */
#include "cpp-pyprint/pyprint.h"

#endif

void Main() {
    int N, K;
    cin >> N >> K;
    ll ans = 0;
    for (ll k = K; k <= N + 1; k++){
        // 連続するn個からk個選んだときに取れる値は k(n-k)+1
        ans += ((k * (N + 1 - k) + 1) % MOD);
    }
    cout << (ans % MOD) << endl;
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(15);
    Main();
    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;
const long long MOD=1000000007;
int main(){
  long long N,K;
  cin >> N >> K;
  long long A[N+1];
  for(long long i=1;i<=N+1;i++)
    A[i]=(i*N%MOD-i*(i+1)%MOD+1)%MOD;
  long long count=0;
  for(long longj=K;j<=N+1;j++)
    count=(A[j]+count)%MOD;
  cout << count%MOD << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:20: error: 'j' was not declared in this scope
   11 |   for(long longj=K;j<=N+1;j++)
      |                    ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
 
int kai(int n){
  if(n==1) return 1;
  else return n * kai(n-1);
}
 
int main() {
  int n, k, c(0);
  cin >> n >> k;
  for(int i(k);i<n+2){
    c += kai(n+1)/(kai(i)*kai(n-i+1))
  }  
  cout << c;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:21: error: expected ';' before ')' token
   12 |   for(int i(k);i<n+2){
      |                     ^
      |                     ;
a.cc:13:38: error: expected ';' before '}' token
   13 |     c += kai(n+1)/(kai(i)*kai(n-i+1))
      |                                      ^
      |                                      ;
   14 |   }
      |   ~
Language: C++

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

ll modpow(ll a, ll n) {
    ll res = 1;
    while(n > 0) {
        if(n & 1) res = res * a % 1000000007;
        a = a * a % 1000000007;
        n >>= 1;
    }

    return res;
}
ll aCb(ll a, ll b) {
    ll ans = 1;

    for(ll i = a; i > a - b; i--) {
        ans = ans * i % 1000000007;
    }

    for(ll i = 1; i <= b; i++) {
        ans = (ans * mod(i, 1000000007 - 2)) % 1000000007;
    }

    return ans;
}
int main() {
   int N,K;
   cin >> N >> K;
    ll sum = 0;
   for(int i = K; i <=N + 1; i++) {
       sum += modpow(i, N + 1);
   }
    return 0;
}

Compiler output:
a.cc: In function 'll aCb(ll, ll)':
a.cc:23:22: error: 'mod' was not declared in this scope; did you mean 'modf'?
   23 |         ans = (ans * mod(i, 1000000007 - 2)) % 1000000007;
      |                      ^~~
      |                      modf
Language: C

#include <bits/stdc++.h>
using LL = long long;
using namespace std;
const LL mod = 1e9 + 7;
int main() {
	LL n, k; cin >> n >> k;
	LL pre_sum[n + 1] = {};
	for (LL i = 1; i <= n; i++) {
		pre_sum[i] = pre_sum[i - 1] + i;
	}
	LL ans = 1;
	for (LL i = k; i <= n; i++) {
		// if (i <= 5)
		// 	cout << ans << "\n";
		ans = (ans + pre_sum[n] - pre_sum[n - i] - pre_sum[i - 1] + 1) % mod;
		// if (i <= 5)
		// cout << pre_sum[n] << ' ' << pre_sum[n - i]
		// 	 << ' ' << pre_sum[i - 1] << "\n";
		// if (i <= 5)
		// 	cout << ans << "\n";
	}
	cout << 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++

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

def kai(int n){
  if(n==1) return 1;
  else return n * kai(n-1);
}

int main() {
  int n, k, c(0);
  cin >> n >> k;
  for(int i(k);i<n+2){
    c += kai(n+1)/(kai(i)*kai(n-i+1))
  }  
  cout << c;
}

Compiler output:
a.cc:4:1: error: 'def' does not name a type
    4 | def kai(int n){
      | ^~~
a.cc: In function 'int main()':
a.cc:12:21: error: expected ';' before ')' token
   12 |   for(int i(k);i<n+2){
      |                     ^
      |                     ;
a.cc:13:10: error: 'kai' was not declared in this scope
   13 |     c += kai(n+1)/(kai(i)*kai(n-i+1))
      |          ^~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:21:27: error: expected ';' before '}' token
   21 |     ans = ans % 1000000007
      |                           ^
      |                           ;
   22 |   }
      |   ~
Language: C++

#include<iostream>
using namespace std;
const long long MOD=1000000007
int main(){
  long long N,K;
  cin >> N >> K;
  long long A[N+1];
  for(long long i=1;i<=N+1;i++)
    A[i]=(i*N%MOD-i*(i+1)%MOD+1)%MOD;
  long long count=0;
  for(long longj=K;j<=N+1;j++)
    count=(A[j]+count)%MOD;
  cout << count%MOD << endl;
}

Compiler output:
a.cc:4:1: error: expected ',' or ';' before 'int'
    4 | int main(){
      | ^~~
Language: C++

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

ll modpow(ll a, ll n) {
    ll res = 1;
    while(n > 0) {
        if(n & 1) res = res * a % 1000000007;
        a = a * a % 1000000007;
        n >>= 1;
    }

    return res;
}
ll aCb(ll a, ll b) {
    ll ans = 1;

    for(ll i = a; i > a - b; i--) {
        ans = ans * i % 1000000007;
    }

    for(ll i = 1; i <= b; i++) {
        ans = (ans * mod(i, 1000000007 - 2)) % 1000000007;
    }

    return ans;
}
int main() {
   int N,K;
   cin >> N >> K;

   for(int i = K; i <=N + 1; i++) {
       sum += modpow(i, N + 1);
   }
    return 0;
}

Compiler output:
a.cc: In function 'll aCb(ll, ll)':
a.cc:23:22: error: 'mod' was not declared in this scope; did you mean 'modf'?
   23 |         ans = (ans * mod(i, 1000000007 - 2)) % 1000000007;
      |                      ^~~
      |                      modf
a.cc: In function 'int main()':
a.cc:33:8: error: 'sum' was not declared in this scope
   33 |        sum += modpow(i, N + 1);
      |        ^~~
Language: C++

#include <iostream>
using namespace std;

const int MAX = 510000;
const int MOD = 1000000007;


int main() {


  long N;
	 long K;
    cin >> N >>K;
  
  long ans=0;
  long combi;

  vector<long> bb(N+1);
  vector<long> aa(N+1);
  aa.at(0)=0;
  bb.at(0)=0;
  for(int i=1; i<N+2;i++){
    bb.at(i) = bb.at(i-1)+(i-1);
  }
  
    for(int i=1; i<N+2;i++){
    aa.at(i) = aa.at(i-1)+ N - (i-1);
  }
  for(int j=K;j<N+2;j++){

    ans = ans + 1 + aa.at(j) - bb.at(j);
   
     ans = ans % 1000000007;
    
     
   }
    
  cout << ans << endl;
  

}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:3: error: 'vector' was not declared in this scope
   18 |   vector<long> bb(N+1);
      |   ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:18:10: error: expected primary-expression before 'long'
   18 |   vector<long> bb(N+1);
      |          ^~~~
a.cc:19:10: error: expected primary-expression before 'long'
   19 |   vector<long> aa(N+1);
      |          ^~~~
a.cc:20:3: error: 'aa' was not declared in this scope
   20 |   aa.at(0)=0;
      |   ^~
a.cc:21:3: error: 'bb' was not declared in this scope
   21 |   bb.at(0)=0;
      |   ^~
Language: C

#include<bits/stdc++.h>
using namespace std;
const int MOD = 1000000007;
int main(){
  long long n, k;
  cin >> n >> k;
  if(n <= k) cout << 1 << endl;
  else{
    vector<long long> sum(n + 1, 0);
    long long ans = 1;
    for(long long i = 0; i <= n; ++i){
      sum[i] = i * (i + 1) / 2;
    }
    for(int i = k; i <= n; ++i){
      ans += sum[n] - sum[n - i] - sum[i - 1] + 1;
      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>
#include<iostream>
#include<vector>
using namespace std;
typedef long long ll;

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

    ll sum = 0;
    for (ll i = k; i <= n+1; i++) {
        sum = (sum + (i * (n-i+1) % MOD) + 1) % MOD;
    }

    cout << sum << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:14:37: error: 'MOD' was not declared in this scope
   14 |         sum = (sum + (i * (n-i+1) % MOD) + 1) % MOD;
      |                                     ^~~
Language: Java

import java.util.*;
import java.io.PrintWriter;
public class Main {
{ 
    final int MAX = 1000; 
    int[] f; 
  
    // Constructor
    public gcdOfFibonacci(){
        // Create an array for memoization 
        f = new int[MAX]; 
    } 
  
    // Returns n'th Fibonacci number using table f[]. 
    // Refer method 6 of below post for details. 
    // https://www.geeksforgeeks.org/program-for-nth-fibonacci-number/ 
    private static int fib(int n) { 
        // Base cases 
        if (n == 0) 
            return 0; 
        if (n == 1 || n == 2) 
            return (f[n] = 1); 
  
        // If fib(n) is already computed 
        if (f[n]!=0) 
            return f[n]; 
  
        int k = ((n & 1)==1)? (n+1)/2 : n/2; 
  
        // Applying recursive formula [Note value n&1 is 1 
        // if n is odd, else 0. 
        f[n] = ((n & 1)==1)? (fib(k)*fib(k) + fib(k-1)*fib(k-1)) 
               : (2*fib(k-1) + fib(k))*fib(k); 
  
        return f[n]; 
    } 
  
    // Function to return gcd of a and b 
    private static int gcd(int M, int N) { 
        if (M == 0) 
            return N; 
        return gcd(N%M, M); 
    } 
  
    // This method returns GCD of Fib(M) and Fib(N) 
    static int findGCDofFibMFibN(int M,  int N) { 
        return fib(gcd(M, N)); 
    } 
  
    // Driver method 
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
        // Returns GCD of Fib(M) and Fib(N) 
        gcdOfFibonacci obj = new gcdOfFibonacci(); 
      int N = sc.nextInt();
      int K = sc.nextInt();
        System.out.println(findGCDofFibMFibN(N, K)); 
    } 
  }
}

Compiler output:
Main.java:9: error: illegal start of expression
    public gcdOfFibonacci(){
    ^
Main.java:9: error: invalid method declaration; return type required
    public gcdOfFibonacci(){
           ^
Main.java:60: error: class, interface, enum, or record expected
}
^
3 errors
Language: C

#include <stdio.h>
#define dr 1000000007

int main(){
  long n,k,d[200005],i,m=0;
  scanf("%ld",&n);
  scanf("%ld",&k);
  d[0]=1;
  a=1;
  for(i=0;i<n;i++){
    d[i+1]=(d[i]+n+(dr<<5)-a)%dr;
    a+=i+1;
  }
  for(i=k-1;i<n;i++){
    m+=d[i];
    m%=dr;
  }
  printf("%ld",m);
  return(0);
}

Compiler output:
main.c: In function 'main':
main.c:9:3: error: 'a' undeclared (first use in this function)
    9 |   a=1;
      |   ^
main.c:9:3: note: each undeclared identifier is reported only once for each function it appears in
main.c:11:23: warning: result of '1000000007 << 5' requires 36 bits to represent, but 'int' only has 32 bits [-Wshift-overflow=]
   11 |     d[i+1]=(d[i]+n+(dr<<5)-a)%dr;
      |                       ^~
Language: C++

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

ll modpow(ll a, ll n) {
    ll res = 1;
    while(n > 0) {
        if(n & 1) res = res * a % 1000000007;
        a = a * a % 1000000007;
        n >>= 1;
    }

    return res;
}
ll aCb(ll a, ll b) {
    ll ans = 1;

    for(ll i = a; i > a - b; i--) {
        ans = ans * i % 1000000007;
    }

    for(ll i = 1; i <= b; i++) {
        ans = (ans * mod(i, mod - 2)) % mod;
    }

    return ans;
}
int main() {
   int N,K;
   cin >> N >> K;

   for(int i = K; i <=N + 1; i++) {
       sum += modpow(i, N + 1);
   }
  cout << sum;
    return 0;
}

Compiler output:
a.cc: In function 'll aCb(ll, ll)':
a.cc:23:29: error: 'mod' was not declared in this scope; did you mean 'modf'?
   23 |         ans = (ans * mod(i, mod - 2)) % mod;
      |                             ^~~
      |                             modf
a.cc:23:22: error: 'mod' was not declared in this scope; did you mean 'modf'?
   23 |         ans = (ans * mod(i, mod - 2)) % mod;
      |                      ^~~
      |                      modf
a.cc: In function 'int main()':
a.cc:33:8: error: 'sum' was not declared in this scope
   33 |        sum += modpow(i, N + 1);
      |        ^~~
a.cc:35:11: error: 'sum' was not declared in this scope
   35 |   cout << sum;
      |           ^~~
Language: C

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define ll long long
#define INF 1<<31-1
#define LNF 9223372036854775807
#define PI 3.14159265358979
#define MIN(x,y) ((x)<(y)?(x):(y))
#define MAX(x,y) ((x)<(y)?(y):(x))
#define FOR(i,a,n) for(i=a;i<n;i++)
#define MOD 1000000007
//#define MOD 998244353
#define NUM 200010
 
void swap(int* a,int* b){int tmp=*a;*a=*b;*b=tmp;}
int abs(int a){if(a<0)return -a;return a;}
int dup(int a,int d){if(a%d==0)return a/d;else return a/d+1;}
int mod(int a,int m){if(a<0)return a%m+m;else return a%m;}

void swapl(ll* a,ll* b){ll tmp=*a;*a=*b;*b=tmp;}
ll absl(ll a){if(a<0)return -a;return a;}
ll dupl(ll a,ll d){if(a%d==0)return a/d;else return a/d+1;}
ll modl(ll a,ll m){if(a<0)return a%m+m;else return a%m;}

ll GCD(ll a,ll b){ll c=1,tmp=MAX(a,b);b=MIN(a,b);a=tmp;while(c!=0){c=a%b;a=b;b=c;}return a;}
ll LCM(ll a,ll b){return a*b/GCD(a,b);}

ll factorial(ll n, ll m) {return n < m ? 1 : n*factorial(n-1, m);}

int upll(const void*a, const void*b){return*(ll*)a<*(ll*)b?-1:*(ll*)a>*(ll*)b?1:0;}
int downll(const void*a, const void*b){return*(ll*)a<*(ll*)b?1:*(ll*)a>*(ll*)b?-1:0;}
void sortup(ll*a,int n){qsort(a,n,sizeof(ll),upll);}
void sortdown(ll*a,int n){qsort(a,n,sizeof(ll),downll);}

// ll dp[]
const int MAXf = 510000;

long long fac[MAXf], finv[MAXf], inv[MAXf];

// テーブルを作る前処理
void COMinit() {
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for (int i = 2; i < MAXf; 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;
    }
}

// 二項係数計算
long long COM(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;
  ll sum=0;

  scanf("%lld%lld", &n, &K) ;

  COMinit();

  for (int i = K; i <= n; i++)
  {
      sum += C0M(n+1, i);
  }

  printf("%lld", sum);
  
  

  return 0;
}

Compiler output:
main.c:39:11: error: variably modified 'fac' at file scope
   39 | long long fac[MAXf], finv[MAXf], inv[MAXf];
      |           ^~~
main.c:39:22: error: variably modified 'finv' at file scope
   39 | long long fac[MAXf], finv[MAXf], inv[MAXf];
      |                      ^~~~
main.c:39:34: error: variably modified 'inv' at file scope
   39 | long long fac[MAXf], finv[MAXf], inv[MAXf];
      |                                  ^~~
main.c: In function 'main':
main.c:70:14: error: implicit declaration of function 'C0M'; did you mean 'COM'? [-Wimplicit-function-declaration]
   70 |       sum += C0M(n+1, i);
      |              ^~~
      |              COM
Language: C

import math
import queue
 
def readInt():
	return int(input())
 
def readInts():
	return list(map(int, input().split()))
 
def readChars():
	return input().split()

x = readInts()
n = x[0]
k = x[1]

def ts(l):
	return int((l*(l-1))/2)

def ts2(l):
	return int(l*(n+n-(l-1))/2)

s = 0

for i in range(k,n+2):
	s += ts2(i)+1-ts(i)

print(s%(1000000007))

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'import'
    2 | import queue
      | ^~~~~~
main.c:2:1: error: unknown type name 'import'
Language: C++

#include <bits/stdc++.h>
#include <math.h>

using namespace std;

long long conb(int n, int r)
{
if(n < 0 || r < 0 || n < r) return 0;
if(!r) return 1;
return conb(n - 1, r - 1) + conb(n - 1, r);
}

int N,K;

int main(){
  cin >> N >> K;
  
  int i;
  long long sum=0;
  
  for(i=K;i<=N+1;i++){
    sum = (sum + comb(N+1,i)) % ((int)pow(10,9)+7);
  }
  
  cout << sum << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:18: error: 'comb' was not declared in this scope; did you mean 'conb'?
   22 |     sum = (sum + comb(N+1,i)) % ((int)pow(10,9)+7);
      |                  ^~~~
      |                  conb
Language: C

N, K = map(int, input().split())
MOD = 1000000007

min_ = sum([i for i in range(K)])
max_ = sum([i for i in range(N, N - K, -1)])

right = K - 1
left = N - (K - 1)

cnt = 0
for k in range(K, N + 2):
    cnt += max_ - min_ + 1
    right += 1
    left -= 1

    min_ += right
    max_ += left

print(cnt % MOD)


Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | N, K = map(int, input().split())
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'N' [-Wimplicit-int]
main.c:1:4: error: type defaults to 'int' in declaration of 'K' [-Wimplicit-int]
    1 | N, K = map(int, input().split())
      |    ^
main.c:1:8: error: implicit declaration of function 'map' [-Wimplicit-function-declaration]
    1 | N, K = map(int, input().split())
      |        ^~~
main.c:1:12: error: expected expression before 'int'
    1 | N, K = map(int, input().split())
      |            ^~~
main.c:2:1: error: expected ',' or ';' before 'MOD'
    2 | MOD = 1000000007
      | ^~~
Language: C

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

const ll INF = 1LL << 60;

const int mod = 1000000007;
struct mint {
  ll x; // typedef long long ll;
  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 { return mint(*this) += a;}
  mint operator-(const mint a) const { return mint(*this) -= a;}
  mint operator*(const mint a) const { return mint(*this) *= 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 { return mint(*this) /= a;}
};
istream& operator>>(istream& is, const mint& a) { return is >> a.x;}
ostream& operator<<(ostream& os, const mint& a) { return os << a.x;}

struct combination {
  vector<mint> fact, ifact;
  combination(int n):fact(n+1),ifact(n+1) {
    assert(n < mod);
    fact[0] = 1;
    for (int i = 1; i <= n; ++i) fact[i] = fact[i-1]*i;
    ifact[n] = fact[n].inv();
    for (int i = n; i >= 1; --i) ifact[i-1] = ifact[i]*i;
  }
  mint operator()(int n, int k) {
    if (k < 0 || k > n) return 0;
    return fact[n]*ifact[k]*ifact[n-k];
  }
};

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

    // combination comb = combination(3 * 10e5);
    // cout << comb(4, 2) << endl;
    vector<ll> sum(N + 2);
    rep(i, N + 1) {
        sum[i + 1] = sum[i] + i;
    }

    // rep(i, N + 2) {
    //     cout << sum[i] << endl;
    // }

    mint ans = 0;
    for (int i = K; i <= N; i++) {
        // cout << i << " " << sum[i] << " " << sum[N + 1] - sum[N - i] << endl;
        // cout<< sum[N + 1] - sum[N - i] << " " << sum[i] << endl;
        ll start = sum[i];
        ll end = sum[N + 1] - sum[N - i + 1];
        // cout << start << " " << end << endl;
        // cout << end - start + 1 << endl;
        ans += end - start + 1;
    }
    ans += 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 <iostream>
#include <bits/stdc++.h>
#include <vector>
#define P 1000000007
#include <algorithm>
typedef long long int ll;
using namespace std;

int main() 
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    ll n,k;
    ll ans=0;
    cin >> n >> k ;
    if(n==1)
    {
        if(k==1) cout << 2 ;
        else cout << 1 ;
        return 0 ;
    }
    ll temp;
    for(i=k;i<=n+1;++i)
    {
        temp = (i*(n+1-i)+1)%P ;
        
        ans=(ans+temp)%P;
        
    }
    cout << ans%P ;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:9: error: 'i' was not declared in this scope
   23 |     for(i=k;i<=n+1;++i)
      |         ^
Language: C

/**
 * Dont raise your voice, improve your argument.
 * --Desmond Tutu
 */

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

vector<string> vec_splitter(string s) {
    for(char& c: s) c = c == ','?  ' ': c;
    stringstream ss; ss << s;
    vector<string> res;
    for(string z; ss >> z; res.push_back(z));
    return res;
}

void debug_out(vector<string> __attribute__ ((unused)) args, __attribute__ ((unused)) int idx) { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(vector<string> args, int idx, Head H, Tail... T) {
    if(idx > 0) cerr << ", ";
    stringstream ss; ss << H;
    cerr << args[idx] << " = " << ss.str();
    debug_out(args, idx + 1, T...);
}

#ifdef XOX
#define debug(...) debug_out(vec_splitter(#__VA_ARGS__), 0, __VA_ARGS__)
#else
#define debug(...) 42
#endif

const double PI = acos(-1);
typedef long long ll;
#define int ll
#define fori(n) for(int i=0; i<int(n); i++)

#define cins(s) string s; cin>>s;
#define cini(i) int i; cin>>i;
#define cind(d) double d; cin>>d;
#define cinai(a, n) vi a(n); fori(n) { cin>>a[i]; }
#define cinas(s, n) vs s(n); fori(n) { cin>>s[i]; }
#define cinad(a, n) vd a(n); fori(n) { cin>>a[i]; }

typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef vector<double> vd;
typedef vector<bool> vb;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<string> vs;

/* we choose at least k numbers from (0,N), how
 * many sums possible ?
 * k<=n
 * nCr(n,k) + nCr(n,k+1) + ... nCr(n,n) sets,
 * but _not_ every set has distinct sum.
 * Sets of diff size have diff sums.
 * So, how much sets in one size have same sum?
 *
 * Example, k=2, n=4
 * 1+2=3
 * 1+3=4
 * 1+4=5
 * 2+3=5
 * 2+4=6
 * 3+4=7
 * We can build all sums between smallest and biggest.
 * Smallest is 1+2+...+k
 * Biggest is n+n-1+n-2+n-(k-1)
 * ...
 */
void solve() {
    cini(n);
    cini(k);

    const int MOD=1e9+7;
    int ans=0;
    for(int i=k; i<=n+1; i++) { /* i=number of choosen numbers */
        int mi=((i-1)*i)/2; /* min sum of choosen numbers: 0+1+2.. */
        int ma=n*i - ((i-1)*i)/2; /* max sum of choosen numbers: n-0+n-1+n-2... */
        ans+=ma-mi+1;
        ans%=MOD;
    }
    cout<<ans<<endl;
}

signed main() {
    cin.tie(nullptr);
    std::ios::sync_with_stdio(false);
    solve();
}



Compiler output:
main.c:6:10: fatal error: bits/stdc++.h: No such file or directory
    6 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C

#include<bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
using namespace std;
typedef long long ll;
ll gcd(ll a,ll b){return b!=0?gcd(b,a%b):a;}
ll lcm(ll a,ll b){return a*b/gcd(a,b);}

const ll mod=1e9+7;

int main(){
    ll n,k,sum=0;
    cin>>n>>k;
    for(ll i=k;i<=n+1;i++){
        sum+=i*(n-i)+1;
        sum%=mod;
    }
    cout<<sum<<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 _USE_MATH_DEFINES
#include <math.h>
#include <algorithm>
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define print(s) cout << s << endl
#define acc(v) accumulate(v.begin(), v.end(), 0)
#define cinv(n, v) rep(i, n) cin >> v[i]

using namespace std;
const int INF = 1e9;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vint;
typedef vector<string> vstr;
typedef vector<char> vchar;
const ll LINF = 1e18;
const ll MOD = 1e9 + 7;
int x_pos[4] = {1, 0, -1, 0}, y_pos[4] = {0, 1, 0, -1};
int ctoi(char c)
{
	if (c >= '0' && c <= '9')
	{
		return c - '0';
	}
	return 0;
}

char upper(char c)
{
	return c - 0x20;
}

char lower(char c)
{
	return c + 0x20;
}

void unique_vector(vector<int> &v)
{
	sort(all(v));
	v.erase(unique(all(v)), v.end());
}

// n次元配列の初期化。第２引数の型のサイズごとに初期化していく。
template <typename A, size_t N, typename T>
void Fill(A (&array)[N], const T &val)
{
	std::fill((T *)array, (T *)(array + N), val);
}

//ユークリッドの互除法
//最大公約数
ll gcd(ll x, ll y)
{
	if (y == 0)
		return x;
	return gcd(y, x % y);
}

//最小公倍数
ll lcm(ll x, ll y)
{
	ll g = gcd(x, y);
	return x / g * y;
}

ll myPow(ll x, ll n, ll m)
{
	if (n == 0)
		return 1;
	if (n % 2 == 0)
		return myPow(x * x % m, n / 2, m);
	else
		return x * myPow(x, n - 1, m) % m;
}

//k!
ll facctorialMethod(ll k)
{
	ll sum = 1;
	for (ll i = 1; i <= k; ++i)
	{
		sum *= i;
		sum %= MOD;
	}
	return sum;
}

//nCr
ll permutationMethod(ll n, ll r)
{
	ll n_sum, r_sum;
	ll i;
	r = n - r;
	n_sum = facctorialMethod(n);
	r_sum = facctorialMethod(r);
	return n_sum / r_sum;
}

// mod. m での a の逆元 a^{-1} を計算する
long long modinv(long long a, long long m) {
    long long b = m, u = 1, v = 0;
    while (b) {
        long long t = a / b;
        a -= t * b; swap(a, b);
        u -= t * v; swap(u, v);
    }
    u %= m;
    if (u < 0) u += m;
    return u;
}

ll pow_kai(int a, int n)
{ //aのn乗を計算します。
	ll 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) % MOD;
		}
		a = (a * a) % MOD;
		n >>= 1; //bit全体を右に1つシフトして一番右を捨てる。
	}
	return x % MOD;
}

ll sum(ll a, ll d, ll n, ll mod)
{
	mod *= 2;
	ll ret = (2 * a + d * (n - 1)) % mod;
	ret = ret * n % mod;
	return ret / 2;
}

int main()
{
	ll n, k;
	cin >> n >> k;
	ll ans = 0;
	for (int i = k; i <= n; i++){
		ll a = sum(n - i + 1, 1, i, MOD);
		ll b = sum(0, 1, i, MOD);
		ans += a-b+1;
	}
	ans += 1;
	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.