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

#include<iostream>
using namespace std;
int main(){
  int M,M;
  cin>>N>>M;
  for(int i=0;i<=M;i++){
  int L,M;
    cin>>L>>M;
  }
  if(L=L+i){
  int ar={L};
    cout<<ar<<endl;
  }
system("pause");
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: redeclaration of 'int M'
    4 |   int M,M;
      |         ^
a.cc:4:7: note: 'int M' previously declared here
    4 |   int M,M;
      |       ^
a.cc:5:8: error: 'N' was not declared in this scope
    5 |   cin>>N>>M;
      |        ^
a.cc:10:6: error: 'L' was not declared in this scope
   10 |   if(L=L+i){
      |      ^
a.cc:10:10: error: 'i' was not declared in this scope
   10 |   if(L=L+i){
      |          ^
Language: C++

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

int main(){
    int N,M,num = 0;

    vector<int> L,R;

    cin >> N >> M;

    for(int i = 0; i < M; i++){
        int a;
        cin >> a;
        L.push_back(a);
        cin >> a;
        R.push_back(a);
    }

    sort(L.begin(), L.end());
    sort(R.begin(), R.end());
    cout <<R[M-1] << L[0] << endl;
    num = R[0] - L[M-1] + 1;

    cout << num << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   20 |     sort(L.begin(), L.end());
      |     ^~~~
      |     short
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 int Max=-1,Min=100001;
 int Maxleft=0;
 int Minright=100001
 int N,M;
 int l,r;
  cin >>N>>M;
  int ans;
  
  for(int i=0;i<M;i++){
    cin >>l>>r;
    if(l<Min){Min=l;Minright=r;}
    if(r>Max){Max=r;Maxleft=l;}
  }
  ans=max(Minright,Maxleft)-min(Minright,Maxleft)+1;
  for(int i=0;i<M;i++){
  if(l>=Maxleft&&r<=minright){if(r-l+1<ans){ans=r-l+1;}}
  }
  cout <<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:2: error: expected ',' or ';' before 'int'
    8 |  int N,M;
      |  ^~~
a.cc:10:9: error: 'N' was not declared in this scope
   10 |   cin >>N>>M;
      |         ^
a.cc:10:12: error: 'M' was not declared in this scope
   10 |   cin >>N>>M;
      |            ^
a.cc:20:21: error: 'minright' was not declared in this scope; did you mean 'Minright'?
   20 |   if(l>=Maxleft&&r<=minright){if(r-l+1<ans){ans=r-l+1;}}
      |                     ^~~~~~~~
      |                     Minright
Language: C++

#include <iostream>

using namespace std;

main(){
    int N,M,L,R,min_x,max_x;
    cin >> N >> M;

    min_x = 1;
    max_x = N;

    for(int j=1;j<M+1;j++)
    {
        cin >> L >> R;

        if(R <= min_x || L >= max_x)
        {
            cout << 0 << endl;
            return　0;
        }
        
        if(L >= min_x) min_x = L;
        if(R <= max_x) max_x = R;

    }

    cout << max_x - min_x + 1 <<endl;

}

Compiler output:
a.cc:19:13: error: extended character 　 is not valid in an identifier
   19 |             return　0;
      |             ^
a.cc:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:19:13: error: 'return\U000030000' was not declared in this scope
   19 |             return　0;
      |             ^~~~~~~~~
Language: C++

#include <iostream>

using namespace std;

main(){
    int N,M,L,R,min_x,max_x;
    cin >> N >> M;

    min_x = 1;
    max_x = N;

    for(int j=1;j<M+1;j++)
    {
        cin >> L >> R;

        if(R <= min_x || L >= max_x)
        {
            cout << 0 << endl;
            return;
        }
        
        if(L >= min_x) min_x = L;
        if(R <= max_x) max_x = R;

    }

    cout << max_x - min_x + 1 <<endl;

}

Compiler output:
a.cc:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:19:13: error: return-statement with no value, in function returning 'int' [-fpermissive]
   19 |             return;
      |             ^~~~~~
Language: C

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

int main(){
    int N, M;
    cin >> N >> M;
    vector<int> x(N+1, 1);
    x[0] = 0;
    int L, R;
    for(int i=0;i<M;i++){
        cin >> L >> R;
        vector<int> y(N+1, 0);
        for(int j=L;j<=R;j++){
            y[j] = 1;
        }
        for(int j=0;j<+N+1;j++){
            x[j] = x[j] * y[j];
        }
    }
    int count = 0;
    for(int j=0;j<+N+1;j++){
        if(x[j]==1)count = count + 1;
    }
    cout << count;
    return 0;
}


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

#include<iostream>
using namespace std;

int main()
{
  int m,n;
  cin >> m >> n;
  int l, r;
  int ans;
  int max,min;
  
  for(j=0;j<m;j++){
    cin >> l >> r;
    if(min < l)
      min =l;
    if(max > r)
      max = r;
  }
  
  ans = max - min +1;
  
  cout << ans;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:7: error: 'j' was not declared in this scope
   12 |   for(j=0;j<m;j++){
      |       ^
Language: C++

#include<iostream>
 
using namespace std;
 
int main(){
	int n,m,j;
  	cin >> n >> m;
  int a=n;

  	int l[m],r[m];
  	for(int i=0; i<m; i++){
      cin >> l[i] >> r[i];  
    }
  
  	for(int i=1; i<=n; i++){ 
    	for(int j=1; j<m; j++)
          if(l[j] > i || i > r[j]) a--; break;
        }
    }
  cout << a << endl;
}


Compiler output:
a.cc:20:3: error: 'cout' does not name a type
   20 |   cout << a << endl;
      |   ^~~~
a.cc:21:1: error: expected declaration before '}' token
   21 | }
      | ^
Language: Java

import java.util.Scanner;
class Main{
    public static void main(String arg[]){
        Scanner scn=new Scanner(System.in);
        int n=scn.nextInt();
        int m=scn.nextInt();
        int L=scn.nextInt();
        int R=scn.nextInt();
        for(int i=0;i<2*(m-1);i++){
            int buf=scn.nextInt();
            if(i%2==0){
                if(L<buf){
                    L = buf;
                }
            }else if(i%2==1){
                if(buf<R){
                    R=buf;
                }
            }
        }    
            
         if((R-L+1>n){
            System.out.println(n);
        }else{
            System.out.println(R-L+1);
        }
    }
}


Compiler output:
Main.java:22: error: ')' expected
         if((R-L+1>n){
                     ^
1 error
Language: C++

#include<iostream>
#include<stdio.h>
#include<string.h>
#include<algorithm>
#include<vector>
#include<queue>
#include<map>
#include<set>
#include<iomanip>
#include<cmath>


#define REP(i,n) for (int i = 0; (i) < (n); ++ (i))
#define FOR(i,n) for (int i = 1; (i) <= (n); ++ (i))
#define dump(x)  cout << #x << " = " << (x) << endl;
#define pb push_back
#define int long long
//#define lint long long

const int INF = 1e9;
const int MOD = 1e9+7;
//const lint LINF = 1e18;
const double eps = 0.000000001;//もとの値の10^(-16)まで


using namespace std;
int n,m;
int a,b;


signed main(){
  cin >> n >> m;
  int r = 0;
  int l = 2000000;
  REP(i,m){
    int k1,k2;
    cin >> k1 >> k2;
    r = max(r,k1);
    l = min(l,k2);
  }
  cout << max(l-r + 1,0) << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:41:14: error: no matching function for call to 'max(long long int, int)'
   41 |   cout << max(l-r + 1,0) << endl;
      |           ~~~^~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:41:14: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   41 |   cout << max(l-r + 1,0) << endl;
      |           ~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:4:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:41:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   41 |   cout << max(l-r + 1,0) << endl;
      |           ~~~^~~~~~~~~~~
Language: C++


int main() {
	int n; cin >> n;
	int m; cin >> m;
	int* l;
	int* r;
	l = new int[n];
	r = new int[n];
	for (int i = 0; i < m; i++) {
		cin >> l[i];
		cin >> r[i];
		
	}
	
	int ch = 0;
	int sum = 0;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			if (l[j] <= i && i <= r[j]) {
				ch = ch + 1;	
			}
				}
		if (ch == m) {
			sum += 1;
		}
		ch = 0;
		
	}
	cout << sum;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:16: error: 'cin' was not declared in this scope
    3 |         int n; cin >> n;
      |                ^~~
a.cc:29:9: error: 'cout' was not declared in this scope
   29 |         cout << sum;
      |         ^~~~
Language: C++

def main():
    N, M = map(int, input().split())
    L = []
    R = []
    for m in range(M):
        l, r = map(int, input().split())
        L.append(l)
        R.append(r)
    print(max((min(R)-max(L)+1), 0))


if __name__ == '__main__':
    main()


Compiler output:
a.cc:12:16: warning: multi-character literal with 8 characters exceeds 'int' size of 4 bytes
   12 | if __name__ == '__main__':
      |                ^~~~~~~~~~
a.cc:1:1: error: 'def' does not name a type
    1 | def main():
      | ^~~
Language: C++

#include<stdio.h>
int max(int a,int b){
    if(a>=b){
        return a;
    }else{
        return b;
    }
}
int mini(int a,int b){
    if(a>=b){
        return b;
    }else{
        return a;
    }
}
int main(){
    int n,m,i,l,r,lm=0,rm;
    scanf("%d %d",&n,&m);
    rm=n+1;
    for(i=0;i<m;i++){
        scanf("%d %d",&l,&r);
        lm=max(l,lm);
        rm=mini(r,rm);
    }
    int gt=rm-rl+1;
    if(gt<0)gt=0;
    printf("%d\n",gt);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:15: error: 'rl' was not declared in this scope; did you mean 'rm'?
   25 |     int gt=rm-rl+1;
      |               ^~
      |               rm
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define MIN(a, b) ((a) <= (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
int main(){
	int n,m,ans,right,left;
	cin >> n >> m;
	vector<int>l(m+1);
	vector<int>r(m+1);

	for(int i=1;i<=m;i++){
		cin >> l.at(i) >> r.at(i);
		if(i==1){
			left = l.at(i);
			right = r.at(i);
		}
		else{
		if(l.at(i)>l.at(i-1)){
			left = l.at(i);
		}
		if(r.at(i)<r.at(i-1)){
			right = r.at(i);
		}
		}
	}
	ans = right-left+1;

Compiler output:
a.cc: In function 'int main()':
a.cc:27:28: error: expected '}' at end of input
   27 |         ans = right-left+1;
      |                            ^
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C++

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

int main(){
    int N, M;
    vector<int> L(N,0)
    vector<int> R(N,0);
    cin >> N >> M ;
    for(int i = 0;i<M;i++){
        cin >> L[i] >> R[i];
    }
    vector<int> vote(N,0);

    for(int j=0;j<M;j++){
        for(int k=L[j];k<=R[j];k++){
            vote[k] +=1;
        }
    }
    int masterKey = 0;
    for(int l=0;l<N;l++){
        if(vote[l]==M){
            masterKey += 1;
        }
    }
    cout << masterKey << endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: expected ',' or ';' before 'vector'
    8 |     vector<int> R(N,0);
      |     ^~~~~~
a.cc:11:24: error: 'R' was not declared in this scope
   11 |         cin >> L[i] >> R[i];
      |                        ^
a.cc:16:27: error: 'R' was not declared in this scope
   16 |         for(int k=L[j];k<=R[j];k++){
      |                           ^
Language: C++

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

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

  vector<int> l(m);
  vector<int> r(m);
  for(int i=0;i<m;i++){
    cin>>l.at(i) >>r.at(i)
  }
  int ans = 0;
  for(int i=1;i<=n;i++){
    bool esc = false;
    for(int j=0;j<m;j++){
      if(i < l.at(j) || i > r.at(j)){
        esc = true;
        break;
      }
    }
    if(esc) break;
    ans++;
  }
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:27: error: expected ';' before '}' token
   10 |     cin>>l.at(i) >>r.at(i)
      |                           ^
      |                           ;
   11 |   }
      |   ~
Language: C++

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
using namespace std;
typedef long long int ll;

int main()
{
    ll N,M;
    ll ans=0;
    cin>>N>>M;
    vector<ll> L(M),R(M);

    for(ll i=0;i<M;i++)
    {
        cin>>L[i]>>R[i];
    }
    for(ll i=0;i<M;i++)
        if(L[i]>i+1 || i>R[i])
        {
            cout<<0<<endl;
            return;
        }

    ans = *min_element(R.begin(),R.end())-*min_element(L.begin(),L.end())+1;
    cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:13: error: return-statement with no value, in function returning 'int' [-fpermissive]
   23 |             return;
      |             ^~~~~~
Language: C++

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
using namespace std;
typedef long long int ll;

int main()
{
    ll N,M;
    ll ans=0;
    cin>>N>>M;
    vector<ll> L(M),R(M);

    for(ll i=0;i<M;i++)
    {
        cin>>L[i]>>R[i];
    }
    for(ll i=0;i<M;i++)
        if(L[i]>i+1 || i>R[i])
        {
            cout<<0<<endl;
            return
        }

    ans = *min_element(R.begin(),R.end())-*min_element(L.begin(),L.end())+1;
    cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:9: error: expected primary-expression before '}' token
   24 |         }
      |         ^
a.cc:23:19: error: expected ';' before '}' token
   23 |             return
      |                   ^
      |                   ;
   24 |         }
      |         ~
Language: Java

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.lang.Integer;
import
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int numId = sc.nextInt();
        int numGate = sc.nextInt();

        Integer[] card = new Integer[numId];
        Integer[] ansList = new Integer[numId];

        for (int i = 0; i < numId; i++) {
            int cardNum = sc.nextInt();
            card[i] = cardNum;
        }

        int count=0;
        for (int j = 0; j < card.length/2; j++) {
            for(int k =0; k < card.length; k++) {
                if (card[k] >= card[2*j] || card[k] == card[2*j + 1] ) {
                    ansList[k] += 1;
                }
            }
        }
        for(int l=0; l < card.length; l ++){
            if(ansList[l]== numGate){
                count ++;
            }
        }
        System.out.println(count);
    }
}

Compiler output:
Main.java:5: error: <identifier> expected
import
      ^
1 error
Language: Java

import java.util.*;

public class C
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();

        int[] l = new int[m];
        int[] r = new int[m];
        int lMax = 1; int rMin = n;
        for (int i = 0; i < m; i++)
        {
            l[i] = sc.nextInt();
            r[i] = sc.nextInt();
            if (l[i] > lMax) lMax = l[i];
            if (r[i] < rMin) rMin = r[i];
        }

        int count = 0;
        loop:
        for (int j = lMax; j <= rMin; j++)
        {
            for (int i = 0; i < m; i++)
            {
                if (j < l[i] || r[i] < j)
                    continue loop;
            }
            count++;
        }

        System.out.println(count);
    }
}


Compiler output:
Main.java:3: error: class C is public, should be declared in a file named C.java
public class C
       ^
1 error
Language: C++

#include <algorithm>
#include <iostream>
#include <iomanip>
#include <cstring>
#include <cstdlib>
#include <utility>
#include <cstdio>
#include <vector>
#include <string>
#include <queue>
#include <stack>
#include <cmath>
#include <set>
#include <map>
int GCD(int a, int b) {
	return b ? GCD(b, a%b) : a;
}
//sort(a, a + N, greater<int>())   // descend
//sort(a, a+N)                    //  ascend

using ll = long long;
using namespace std;

int l[110000];
int r[110000];
int ans[110000];
int pp = 0;
int tmp1 = 1100000;
int tmp2 = 0;
int main() {
	int n, m;
	cin >> n >> m;
	for (int i = 1; i <= m; i++) cin >> l[i] >> r[i];

	for (int i = 1; i <= m; i++) {
		tmp2 = max(tmp2, l[i]);
	}
	for (int i = 1; i <= m; i++) {
		tmp1 = min(tmp1, r[i]);
	}
	if(tmp-tmp2+1>=0) cout << tmp1 - tmp2 + 1;
	else cout << 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:12: error: 'tmp' was not declared in this scope; did you mean 'tmp2'?
   41 |         if(tmp-tmp2+1>=0) cout << tmp1 - tmp2 + 1;
      |            ^~~
      |            tmp2
Language: C++

#include<bits/stdc++.h>


using namespace std;

int main(){
    int N,M;
    vector<int> ans;
    cin >> N >> M;

    int L[M],R[M];
    for(int i = 0; i < M; i++){
        cin >> L[i] >> R[M];
    }

    


    for(int i = L[0]; i <= R[0]; i++){
        ans.push_back(i);
    }

    cout << ans.size() << endl;
    
    for(int i = 0; i < M ; i++){
        auto itr = ans.begin();

        for(; itr !=ans.end(); itr++){
            if(L[i]<=*itr && *itr<=R[i]){
                
            }else{
                ans.erase(itr);
            }
            
        }
        
        
    }

    

Compiler output:
a.cc: In function 'int main()':
a.cc:38:6: error: expected '}' at end of input
   38 |     }
      |      ^
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C

#include<stdio.h>
int main(){
  int a[20001];
  int N,M;
  int i;
  int b[20001]={};
  int cnt;
  scanf("%d %d",&N,&M);
  for(i=1;i<2*M;i=i+2){
    scanf("%d %d",&a[i],&a[i+1]);
  }
  
  for(j=1;j<=M;j++){//Lについて
  for(i=1;i<=M;i=i+2){
    if(a[i]>=a[j]){
      b[i]=1;
    }
    else b[i]=0;
  }
    
  for(i=1;i<=M;i=i+2){
    if(b[i]==M) cnt++:
  }
    
  printf("%d\n",cnt+1);
  return 0;
}
    
    
  
  

Compiler output:
main.c: In function 'main':
main.c:13:7: error: 'j' undeclared (first use in this function)
   13 |   for(j=1;j<=M;j++){//Lについて
      |       ^
main.c:13:7: note: each undeclared identifier is reported only once for each function it appears in
main.c:22:22: error: expected ';' before ':' token
   22 |     if(b[i]==M) cnt++:
      |                      ^
      |                      ;
main.c:27:1: error: expected declaration or statement at end of input
   27 | }
      | ^
Language: C++

#include<iostream>
using namespace std;
int main()
{
    long long n,m,tmp=0,count=0;
    cin>>n>>m;
    long long a1[m],a2[m];
    set<long long> s1;
    set<long long> s2;
    set<long long>::iterator it;
    for(long long i=0;i<m;++i)
    {
        cin>>a1[i]>>a2[i];
        s1.insert(a1[i]);
        s2.insert(a2[i]);
    }
    long long a,b;
    it=s2.begin();
    *it = a;
    it=s1.end();--it;
    *it=b;
    if(b>a){cout<<0;return 0}
    cout<<a-b+1;
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'set' was not declared in this scope
    8 |     set<long long> s1;
      |     ^~~
a.cc:2:1: note: 'std::set' is defined in header '<set>'; this is probably fixable by adding '#include <set>'
    1 | #include<iostream>
  +++ |+#include <set>
    2 | using namespace std;
a.cc:8:9: error: expected primary-expression before 'long'
    8 |     set<long long> s1;
      |         ^~~~
a.cc:9:9: error: expected primary-expression before 'long'
    9 |     set<long long> s2;
      |         ^~~~
a.cc:10:9: error: expected primary-expression before 'long'
   10 |     set<long long>::iterator it;
      |         ^~~~
a.cc:14:9: error: 's1' was not declared in this scope; did you mean 'a1'?
   14 |         s1.insert(a1[i]);
      |         ^~
      |         a1
a.cc:15:9: error: 's2' was not declared in this scope; did you mean 'a2'?
   15 |         s2.insert(a2[i]);
      |         ^~
      |         a2
a.cc:18:5: error: 'it' was not declared in this scope; did you mean 'int'?
   18 |     it=s2.begin();
      |     ^~
      |     int
a.cc:18:8: error: 's2' was not declared in this scope; did you mean 'a2'?
   18 |     it=s2.begin();
      |        ^~
      |        a2
a.cc:20:8: error: 's1' was not declared in this scope; did you mean 'a1'?
   20 |     it=s1.end();--it;
      |        ^~
      |        a1
a.cc:22:29: error: expected ';' before '}' token
   22 |     if(b>a){cout<<0;return 0}
      |                             ^
      |                             ;
Language: C++

#include<iostream>
#include<algorithm>

using namespace std;

int main(){
  long long N,M,L[100003],R[100003],X,Y,Z;
  cin >> N >> M;
  for(int i=1;i<=M;i++){
    cin >> L[i]>>R[i];
    if(i==1){
      X=L[1];
      Y=R[1];
    }else{
    X = max({X,L[i]});
    Y = min({Y,R[i]});
  }
}
Z = Y[M] - X[M] + 1;
cout << Z <<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:6: error: invalid types 'long long int[long long int]' for array subscript
   19 | Z = Y[M] - X[M] + 1;
      |      ^
a.cc:19:13: error: invalid types 'long long int[long long int]' for array subscript
   19 | Z = Y[M] - X[M] + 1;
      |             ^
Language: C++

#include<stdio.h>
int main(void)
{
	int n, m, l[1000000], r[1000000],j, i,a=0,b=1000001,c=0;
	scanf("%d", &n);
	scanf("%d", &m);
	for (i = 0; i < m; i++) {
		scanf("%d", &l[i]);
		if (a < l[i]) {
			a = l[i];
		}
		scanf("%d", &r[i]);
		if (b > r[i]) {
			b = r[i];
		}
	}
	for (i = 0; i < m; i++) {
		for (j = 0; j < n; j++) {
			if (j+ 1 >= a && j + 1 <= b) {
				c++;
		}
	}
	printf("%d\n", c);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:2: error: expected '}' at end of input
   25 | }
      |  ^
a.cc:3:1: note: to match this '{'
    3 | {
      | ^
Language: C++

#include <iostream>
#include <vector>
#include <map>
#include <cstdio>
#include <string>
#include <algorithm>
using namespace std;

int main(void){
  int N, M;
  cin >> N >> M;
  int max = N + 100;
  int min = 0;
  for(int cnt = 0; cnt < M; ++cnt){
    int l, r;
    cin >> l >> r;
    if(min < l){
      min = l;
    }
    if(r < max){
      max = r;
    }
  }
  ans = max - min + 1;
  if(ans > N) ans = N;
  if(ans < 0) ans = 0;
  cout << ans << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:3: error: 'ans' was not declared in this scope; did you mean 'abs'?
   24 |   ans = max - min + 1;
      |   ^~~
      |   abs
Language: C++

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

int comp(const void *n1, const void *n2)
{
  int *a= n1, *b = n2; 
  if(*a < *b)
    return -1;
  else if(*a == *b)
    return 0;
  else
    return 1;
}


int main(void)
{
  int n,m,l[100000],r[100000];
  int buttom=0,top=0,frag=0;
  int i,j;
  
  scanf("%d %d",&n, &m);
  for(i = 0; i < m; i++)
    scanf("%d %d",l+i, r+i);
  
  qsort(l, m, sizeof(int), comp);
  qsort(r, m, sizeof(int), comp);
  
  printf("%d\n", r[0] - l[m] + 1);  
  return 0;
}
        

Compiler output:
a.cc: In function 'int comp(const void*, const void*)':
a.cc:6:11: error: invalid conversion from 'const void*' to 'int*' [-fpermissive]
    6 |   int *a= n1, *b = n2;
      |           ^~
      |           |
      |           const void*
a.cc:6:20: error: invalid conversion from 'const void*' to 'int*' [-fpermissive]
    6 |   int *a= n1, *b = n2;
      |                    ^~
      |                    |
      |                    const void*
Language: C++

#include <iostream>
using namespace std;
int main(void){
    int N,M;
    std::cin >> N >> M;
    int L[M],R[M],x = N;
    for (int i = 0; i < M; i++) {
        std::cin >> L[i] >>R[i];
    }
    for (int i = 1; i < N+1; i++) {
        for (int ia = 0; ia < M; ia++) {
            if((i<L[ia]||i>R[ia])&&a==0){
                x--;
                break;
            }
        }
    }
    std::cout << x << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:36: error: 'a' was not declared in this scope; did you mean 'ia'?
   12 |             if((i<L[ia]||i>R[ia])&&a==0){
      |                                    ^
      |                                    ia
Language: C++

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

int comp(const void *n1 const void *n2)
{
  int *a= n1, *b = n2; 
  if(*a < *b)
    return -1;
  else if(*a == *b)
    return 0;
  else
    return 1;
}


int main(void)
{
  int n,m,l[100000],r[100000];
  int buttom=0,top=0,frag=0;
  int i,j;
  
  clear[1] = 0;
  for(i = 1; i < 100001; i++)
    clear[i] = 1;
  
  scanf("%d %d",&n, &m);
  for(i = 0; i < m; i++)
    scanf("%d %d",l+i, r+i);
  
  qsort(l, m, sizeof(int), comp);
  qsort(r, m, sizeof(int), comp);
  
  printf("%d\n", r[0] - l[m] + 1);  
  return 0;
}
        

Compiler output:
a.cc:4:25: error: expected ',' or '...' before 'const'
    4 | int comp(const void *n1 const void *n2)
      |                         ^~~~~
a.cc: In function 'int comp(const void*)':
a.cc:6:11: error: invalid conversion from 'const void*' to 'int*' [-fpermissive]
    6 |   int *a= n1, *b = n2;
      |           ^~
      |           |
      |           const void*
a.cc:6:20: error: 'n2' was not declared in this scope; did you mean 'n1'?
    6 |   int *a= n1, *b = n2;
      |                    ^~
      |                    n1
a.cc: In function 'int main()':
a.cc:22:3: error: 'clear' was not declared in this scope
   22 |   clear[1] = 0;
      |   ^~~~~
a.cc:30:28: error: invalid conversion from 'int (*)(const void*)' to '__compar_fn_t' {aka 'int (*)(const void*, const void*)'} [-fpermissive]
   30 |   qsort(l, m, sizeof(int), comp);
      |                            ^~~~
      |                            |
      |                            int (*)(const void*)
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/c++/14/stdlib.h:36,
                 from a.cc:2:
/usr/include/stdlib.h:971:34: note:   initializing argument 4 of 'void qsort(void*, size_t, size_t, __compar_fn_t)'
  971 |                    __compar_fn_t __compar) __nonnull ((1, 4));
      |                    ~~~~~~~~~~~~~~^~~~~~~~
a.cc:31:28: error: invalid conversion from 'int (*)(const void*)' to '__compar_fn_t' {aka 'int (*)(const void*, const void*)'} [-fpermissive]
   31 |   qsort(r, m, sizeof(int), comp);
      |                            ^~~~
      |                            |
      |                            int (*)(const void*)
/usr/include/stdlib.h:971:34: note:   initializing argument 4 of 'void qsort(void*, size_t, size_t, __compar_fn_t)'
  971 |                    __compar_fn_t __compar) __nonnull ((1, 4));
      |                    ~~~~~~~~~~~~~~^~~~~~~~
Language: C++

#include "pch.h"
#include <cstdio>
#include <algorithm>
#include <queue>
using namespace std;

typedef unsigned long long ull;

int main()
{
	int N, M, L, R;
	int mn = -1, mx = 1000001;
	scanf("%d%d", &N, &M);
	for (int i = 0; i < M; ++i) {
		scanf("%d%d", &L, &R);
		mx = min(mx, R);
		mn = max(mn, L);
	}
  	int ans = mx - mn + 1;
	printf("%d", ans >= 0 ? ans : 0);
}

Compiler output:
a.cc:1:10: fatal error: pch.h: No such file or directory
    1 | #include "pch.h"
      |          ^~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
int main()
{
  int n,m;
  int l,r,l1,r1;


  std::cin>>n>>m;
  std::cin>>l>>r;
  for(int i=1;i<m;i++)
  {
      std::cin>>l1>>r1;
    if(l1>l)
    {
      l=l1;
    }
    if(r1<r)
    {
      r=r1;
    }
  }
  
  int a=r+1-l;
  if(a<0)
  {
    int b=0;
    cout<<b;
  }
  else
  {
      std::cout<<a;
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   27 |     cout<<b;
      |     ^~~~
      |     std::cout
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <iostream>
#include <stdio.h>
#include <numeric>
#include <algorithm>

using namespace std;

int main(void){
  int n, m, ans=0;
  cin >> n >> m;
  int l[m], r[m], ans[n]={};

  for(int i=0; i<m; ++i)
    scanf("%d %d", &l[i], &r[i]);

  if(*min_element(r, r+m) - *max_element(l, l+m) + 1 >= 0)
    ans = *min_element(r, r+m) - *max_element(l, l+m) + 1 >= 0;

  cout <<  ans << endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:19: error: conflicting declaration 'int ans [n]'
   11 |   int l[m], r[m], ans[n]={};
      |                   ^~~
a.cc:9:13: note: previous declaration as 'int ans'
    9 |   int n, m, ans=0;
      |             ^~~
Language: C++

#include<bits/stdc++.h>
int main()
{
  int n,m;
  int l,r,l1,r1;


  std::cin>>n>>m;
  std::cin>>l>>r;
  for(int i=1;i<m;i++)
  {
      std::cin>>l1>>r1;
    if(l1>l)
    {
      l=l1;
    }
    if(r1<r)
    {
      r=r1;
    }
  }
  
  int a=r+1-l;
  if(a<0)
  {
    cout<<0;
  }
  else
  {
      std::cout<<a;
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   26 |     cout<<0;
      |     ^~~~
      |     std::cout
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<stdio.h>
int main(void){
  int n,m,i,j;
  int k=0;
  scanf("%d %d",&n,&m);
  int l[m];
  int r[m];
  for(i=0;i<m;i++){
    scanf("%d %d",&l[i],r[i]);
  }
  for(j=0;j<n;j++){
    if(l[j]<=j+1&&j+1<=r[j]){
      k=k+1;
    }
  }
  printf("%d\n",k)
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:19: error: expected ';' before 'return'
   16 |   printf("%d\n",k)
      |                   ^
      |                   ;
   17 |   return 0;
      |   ~~~~~~
Language: C++

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


typedef long long ll;
typedef pair<int,int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef long double ld;

typedef set<int>::iterator sit;
typedef map<int,int>::iterator mit;
typedef vector<int>::iterator vit;

const int INF = 1e9 + 7;
const int MOD = 1e9 + 7;
const int MAXN = 1e6 + 3;

#define _  %  MOD
#define __ %= MOD

#define      each(it,s)        for(auto it = s.begin(); it != s.end(); ++it)
#define      sortA(v)          sort(v.begin(), v.end())
#define      sortD(v)          sort(v.begin(), v.end(), greater<auto>())
#define      fill(a)           memset(a, 0, sizeof (a))

#define      swap(a,b)        {a=a+b;b=a-b;a=a-b;}
#define      rep(i, n)         for(int i = 0; i < (n); ++i)
#define      repA(i, a, n)     for(int i = a; i <= (n); ++i)
#define      repD(i, a, n)     for(int i = a; i >= (n); --i)
#define watch(x) cout << (#x) << " is " << (x) <<endl

#define fi first
#define se second
#define mp make_pair
#define pb push_back

#define fbo find_by_order
#define ook order_of_key

ll gcd(ll a,ll b){if(b==0) return a; else return gcd(b,a%b);}
ll power(ll x,ll y){ll res=1; while(y>0){if(y&1) res=res*x;y=y>>1;x=x*x;}return res;} // modular exponent

int main()
{
    ios_base::sync_with_stdio(false); // don't use printf and scanf
    cin.tie(NULL); // cout<<fixed<<setprecision
    ll n,m,l,r;
    cin>>n>>m;
    ll lower=1;
    ll higher=n;
    if()
    for(ll i=0;i<m;i++)
    {
        cin>>l>>r;
        if(r<l) return 0;
        if(l>lower) lower=l;
        if(r<higher) higher=r;
    }
    cout<<(higher-lower+1)<<'\n';
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:52:8: error: expected primary-expression before ')' token
   52 |     if()
      |        ^
Language: C++

#include<stdio.h>
int main(void){
  int n,m,i,j;
  int k==0;
  scanf("%d %d",&n,&m);
  int l[m];
  int r[m];
  for(i=0;i<m;i++){
    scanf("%d %d",&l[i],r[i]);
  }
  for(j=0;j<n;j++){
    if(l[j]<=j+1&&j+1<=r[j]){
      k=k+1;
    }
  }
  printf("%d\n",k)
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:8: error: expected initializer before '==' token
    4 |   int k==0;
      |        ^~
a.cc:13:7: error: 'k' was not declared in this scope
   13 |       k=k+1;
      |       ^
a.cc:16:17: error: 'k' was not declared in this scope
   16 |   printf("%d\n",k)
      |                 ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  int M;
  cin >> N >> M;
  vector<int> L(M);
  vector<int> R(M);
  for (int i = 0; i<M; i++){
    cin >> L.at(i);
  }
  
  for (int i = 0; i<M; i++){
    cin >> R.at(i);
  }
  
  int maxL;
  int minR;

  for (int i = 0; i<M; i++){
    if(L.at(i)>maxL){
      maxL=L.at(i);
    }
  }
  
  for (int i = 0; i<M; i++){
    if(R.at(i)<minR){
      minR=R.at(i)
    }
  }
  
  cout << minR - maxL + 1 << endl;
}

  
    
  
  
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:28:19: error: expected ';' before '}' token
   28 |       minR=R.at(i)
      |                   ^
      |                   ;
   29 |     }
      |     ~
Language: C

#include <stdio.h>
int main(void)
{
	int n, m;
	int i, j;
	int *l, *r;
	int l_min, r_max, cnt;
	bool pass;
	l_min = 1000000;
	r_max = 0;

	scanf("%d %d", &n, &m);
	l = (int *)malloc(sizeof(int)*m);
	r = (int *)malloc(sizeof(int)*m);

	for (i = 0; i < m; i++) {
		scanf("%d %d", &l[i], &r[i]);
		if (l_min > l[i])  l_min = l[i];
		if (r_max < r[i])  r_max = r[i];
	}

	cnt = 0;
	for (i = l_min; i <= r_max; i++) {
		pass = true;
		for (j = 0; j < m; j++) {
			if (i < l[j]) {
				pass = false;
				break;
			}
			if (i > r[j]) {
				pass = false;
				break;
			}
		}
		if (pass) cnt++; 
	}
	printf("%d\n", cnt);

	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:8:9: error: unknown type name 'bool'
    8 |         bool pass;
      |         ^~~~
main.c:2:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
    1 | #include <stdio.h>
  +++ |+#include <stdbool.h>
    2 | int main(void)
main.c:13:20: error: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
   13 |         l = (int *)malloc(sizeof(int)*m);
      |                    ^~~~~~
main.c:2:1: note: include '<stdlib.h>' or provide a declaration of 'malloc'
    1 | #include <stdio.h>
  +++ |+#include <stdlib.h>
    2 | int main(void)
main.c:13:20: warning: incompatible implicit declaration of built-in function 'malloc' [-Wbuiltin-declaration-mismatch]
   13 |         l = (int *)malloc(sizeof(int)*m);
      |                    ^~~~~~
main.c:13:20: note: include '<stdlib.h>' or provide a declaration of 'malloc'
main.c:24:24: error: 'true' undeclared (first use in this function)
   24 |                 pass = true;
      |                        ^~~~
main.c:24:24: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
main.c:24:24: note: each undeclared identifier is reported only once for each function it appears in
main.c:27:40: error: 'false' undeclared (first use in this function)
   27 |                                 pass = false;
      |                                        ^~~~~
main.c:27:40: note: 'false' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  int M;
  cin >> N >> M;
  vector<int> L(M);
  vector<int> R(M);
  for (int i = 0; i<N; i++){
    cin >> L.at(i);
  }
  for (int i = 0; i<N; i++){
    cin >> R.at(i);
  }
  int maxL;
  int minR;

  for (int i = 0; i<M; i++){
    if(L.at(i)>maxL){
      maxL=L.at(i);
    }
  }
  
  for (int i = 0; i<M; i++){
    if(R.at(i)<minR){
      minR=R.at(i)
    }
  }
  
  cout << minR - maxL + 1 <<endl;
}

  
    
  
  
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:26:19: error: expected ';' before '}' token
   26 |       minR=R.at(i)
      |                   ^
      |                   ;
   27 |     }
      |     ~
Language: C

#include <iostream>

using namespace std;


int main() {
    int N, M;
    cin >> N >> M;
    int L[M], R[M];
    bool id[N];
    int ans = 0;
    int i,k;
    /*
    for (i = 0; i < N; i++)
    {
        id[i] = true;
    }
    */
    for (i = 0; i < M; i++)
    {
        cin >> L[i] >> R[i];
    }

    //i番目のゲートについて
    for (i = 0; i < M; i++)
    {
        //id[0] ~ id[L_i - 2]は通過できない
        for (k = 0; k < L[i]-1; k++)
        {
            id[k] = true;
        }
        //id[R_i] ~ id[N-1]は通過できない
        for (k = R[i]; k < N; k++)
        {
            id[k] = true;
        }
    }
    
    //falseになっているIDカードだけ数える
    for (i = 0; i < N; i++)
    {
        if (!id[i])
        {
            ans++;
        }
    }
    cout << ans;
    return 0;
}

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

include<stdio.h>
int main(){
    int n,m,i,j;
    int l[1000000];
    int r[1000000];
    int count=0;
    scanf("%d %d",&n,&m);
    for(i=0;i<m;i++){
        scanf("%d %d",&l[i],&r[i]);
    }
    /*for(i=0;i<m;i++){
        printf("%d %d",l[i],r[i]);
    }*/
    int c;
    for(j=1;j<=n;j++){
        int flag = 0;
        for(i=0;i<m;i++){
            //printf("%d %d %d\n",l[i],j,r[i]);
            if(j>=l[i] && j<=r[i]){
                c=0;
            }
            else{
                flag=1;
            }
        }
        if(flag==0) count++;
    }
    printf("%d",count);
    return 0;
}




Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(void){
    int N,M,i,count,tempL,tempR;
    cin >> N >> M;
    vector<int> L(100000);
    vector<int> R(100000);
    for (i=0;i<M;i++){
        cin >> L.at(i) >> R.at(i);
    }
    for (;;){
        count=0;
        for(i=0;i<M-1;i++){
            if (L.at(i)>L.at(i+1)){
                tempL=L.at(i+1);
                L.at(i+1)=L.at(i);
                L.at(i)=tempL;
                count=1;
            }
        }
        if (count==0)break;
    }
    for (;;){
        count=0;
        for(i=0;i<M-1;i++){
            if (R.at(i)>R.at(i+1)){
                tempR=R.at(i+1);
                R.at(i+1)=R.at(i);
                R.at(i)=tempR;
                count=1;
            }
        }
        if (count==0)break;
    }
    tempL=L.at(M-1);
    tempR=R.at(0);
    cout << tempR-tempL+1 <<endl;


Compiler output:
a.cc: In function 'int main()':
a.cc:37:34: error: expected '}' at end of input
   37 |     cout << tempR-tempL+1 <<endl;
      |                                  ^
a.cc:3:15: note: to match this '{'
    3 | int main(void){
      |               ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cmath>
#include <map>
#include<iomanip>
#include<limits>
#include <utility>

#define int long long
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;
#define INF 1e18

int main()
{
	
	int N,M;
	cin >> N>>M;
	vector<int> s(N+1);
	int l,r;
	rep(i,M){
		cin>>l>>r;
		for(int j = l; j <= r; j++) {
			s[j] += 1;
		}
	}
	int ans = 0;
	rep(i,N+1){
		if (s[i] == M) ans ++;
	}
	cout << ans << endl;
 
	return 0;
}

Compiler output:
cc1plus: error: '::main' must return 'int'
Language: C++

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

int main() {
  int N, M;
  cin >> N >> M;
  
  int first, last;
  first = 0;
  last = 100000;
  
  for (int i = 0; i < M; i++) {
    int L, R;
   	cin >> L >> R;
    
    if (L > first) first = L;
    if (R < last) last = R;
  }
  
  if (last >= first) {
    cout << last - first + 1 << endl;
  } else {
    cout << 0 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:2: error: expected '}' at end of input
   24 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include<stdio.h>
using namespace std;

int main(){
    int N, M;
    scanf("%d %d", &N, &M);
    int L[M+1],R[M+1];

    int ML=0, mR=N;
    for(int i=1;i<=M;i++){
        scanf("%d %d", &L[i], &R[i]);
        if(L[i]>ML){
            ML = L[i];
        }
        if(mR>R[i]){
            mR = R[i];
        }
    }
    if(mR-ML=>0){
        printf("%d\n", mR-ML+1);
    }
    return 0;
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:14: error: expected primary-expression before '>' token
   19 |     if(mR-ML=>0){
      |              ^
Language: C

#include <stdio.h>
#define max(a,b) ((a)>(b)?(a):(b))
#define min(a,b) ((a)<(b)?(a):(b))
int main(){
    int n,m,i;
    scanf("%d%d",&n,&m);
    int l,r,L,R;
    scanf("%d%d",&L,&R);
    for(i=1;i<m;i++){
        scanf("%d%d",&l,&r);
        L=max(L,l);
        R=min(R,r);
    }
    if(R>=L)printf("%d",R-L+1);
  	else prinf("0");
}

Compiler output:
main.c: In function 'main':
main.c:15:14: error: implicit declaration of function 'prinf'; did you mean 'printf'? [-Wimplicit-function-declaration]
   15 |         else prinf("0");
      |              ^~~~~
      |              printf
Language: C++

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

bool c[100005];
int main(){
	int m,n,x,y,ans=0;
	cin>>m>>n;
	for(int i=0;i<m;i++){
		cin>>x>>y;
		if(x>=y)
		for(int j=1;j<=n;i++){
			if(!(j>=x && j<=y))
				c[i]=true;
		} 
	}
	for(int j=1;j<=n;i++){
			if(c[i]==false)
				ans++;
		} 
	cout<<ans<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:26: error: 'i' was not declared in this scope
   16 |         for(int j=1;j<=n;i++){
      |                          ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int n, m;
  cin >> n >> m;
  
  if (n < 1 || n > 100000)
  {
    cout << "Invalid number of ID cards" << endl;
    return 1;
  }
  else if (m < 1 || m > 100000)
  {
    cout << "Invalid number of Gates" << endl;
    return 1;
  }

  cin >> a >> b;
  int left, right;  
 
  left = min (a, b);
  right = max (a, b);
  
  while (cin)
  {
    left = max (a, left);
    right = min (b, right);
    
    cin >> a >> b;
  }
  
  int numGates = 0;
  for (int i = left; i <= right; i++)
  {
    numGates++;
  }
  cout << numGates << endl;
  
  return 0;
}
      
int min (int a, int b) {
  if (a <= b) return a;
  else return b;
}

int max (int a, int b) {
  if (a > b) return a;
  else return b;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:10: error: 'a' was not declared in this scope
   19 |   cin >> a >> b;
      |          ^
a.cc:19:15: error: 'b' was not declared in this scope
   19 |   cin >> a >> b;
      |               ^
Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <functional>
#include <map>
#include <queue>
#include <iomanip>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>

using namespace std;


int main() {
    int n, m;
    cin >> n >> m;
    int ml=1, mr=n;
    for (int i=0;i<m;i++) {
        int l, r;
        cin >> l >> r;

        if (ml < l) {
            ml = l;
        }
        if (r < mr) {
            mr = r;
        }
    }
    if (ml <= mr) {
        cout << (mr-ml+1) << endl;
    } else {
        assert(1);
    }

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:35:9: error: 'assert' was not declared in this scope
   35 |         assert(1);
      |         ^~~~~~
a.cc:13:1: note: 'assert' is defined in header '<cassert>'; this is probably fixable by adding '#include <cassert>'
   12 | #include <cmath>
  +++ |+#include <cassert>
   13 |
Language: C++

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

int main(){
  int n,m;
  cin >> n >> m;
  vector<int>L(n);
  vector<int>R(n);

  int min = 2147483647;
  int max = 0;
  for(int i = 0; i < m; i++){
    cin >> L.at(i) >> R.at(i);
    if(min > L.at(i)){
      min = L.at(i)
    }
    if(max < R.at(i)){
      max = R.at(i)
    }
  }

  int ans;
  for(int i = min; i<=max; i++){
    int a = 0;
    for(int j = 0; j<m; j++){
      if(L.at(j) <= i && i <= R.at(j)){
        a++;
      }
    }
    if(a==m){
      ans++;
    }
  }
    
  cout << ans << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:18:20: error: expected ';' before '}' token
   18 |       min = L.at(i)
      |                    ^
      |                    ;
   19 |     }
      |     ~               
a.cc:21:20: error: expected ';' before '}' token
   21 |       max = R.at(i)
      |                    ^
      |                    ;
   22 |     }
      |     ~
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <string>
#include <utility>

using namespace std;

#define REP(i,n) for(int (i)=(0);(i)<(n);++i)
#define REP1(i,n) for(int (i)=(1);(i)<(n);++i)
#define ll long long

int main(){
    int n,m,l,r,ans;
    cin >> n >> m;
    vector<int> left,right;

    REP(i,m){
        cin >> l >> r;
        left.push_back(l);
        right.push_back(r);
    }

    sort(left.begin(),left.end(),greater<int>());
    sort(right.begin(),right.end());

    ans = right[0]-left[0]+1
    if(ans<0)ans=0;
    cout << ans << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:29: error: expected ';' before 'if'
   28 |     ans = right[0]-left[0]+1
      |                             ^
      |                             ;
   29 |     if(ans<0)ans=0;
      |     ~~
Language: C++

#include <iostream>
#include <vector>

std::vector<int> intersection(std::vector<int> &a, std::vector<int> &b) {
    std::vector<int> c;

    std::sort(a.begin(), a.end());
    std::sort(b.begin(), b.end());

    std::set_intersection(
            a.begin(), a.end(),
            b.begin(), b.end(),
            std::back_inserter(c));

    return c;
}

int main() {
    int N, M;
    std::cin >> N >> M;

    std::vector<int> candidates;
    for (int i = 0; i < N; i += 1) {
        candidates.push_back(i + 1);
    }

    for (int i = 0; i < M; i += 1) {
        int L, R;
        std::cin >> L >> R;

        std::vector<int> criteria;
        for (int j = L; j <= R; j += 1) {
            criteria.push_back(j);
        }

        candidates = intersection(candidates, criteria);
    }

    std::cout << candidates.size() << std::endl;

    return 0;
}


Compiler output:
a.cc: In function 'std::vector<int> intersection(std::vector<int>&, std::vector<int>&)':
a.cc:7:10: error: 'sort' is not a member of 'std'; did you mean 'qsort'?
    7 |     std::sort(a.begin(), a.end());
      |          ^~~~
      |          qsort
a.cc:8:10: error: 'sort' is not a member of 'std'; did you mean 'qsort'?
    8 |     std::sort(b.begin(), b.end());
      |          ^~~~
      |          qsort
a.cc:10:10: error: 'set_intersection' is not a member of 'std'
   10 |     std::set_intersection(
      |          ^~~~~~~~~~~~~~~~