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

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

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

//prototype declaration
int getint();
long long getllint();
double getdint();
char getch();
void setstring(char *s);
void showint(int i);
void showllint(long long i);
void showdouble(double i);
void showchar(char c);
void showstring(char *s);

int myPower(int a, int n) { // aのn乗の計算
	int x = 1;
	while (n > 0) { // 全てのbitが捨てられるまで
		if ( n & 1) { // 一番右のbitが１のとき
			x *= a;
		}
		a *= a;
		n >>= 1; // bit全体を右に1つシフトして一番右を捨てる
	}
	return x;
}

int min(int a, int b) {
	return a < b ? a : b;
}

int main(void) {
	int n, m, i;
	n = getint();
	m = getint();
	int l[m], r[m];
	ROOP(i, m) {
		scanf("%d %d", &l[i], &r[i]);
	}
	int lMax = l[0], rMin = r[0];
	ROOP(i, m) {
		if (lMax < l[i]) lMax = l[i];
		if (rMin > r[i]) rMin = r[i];
	}
	if ((rMin - lMax) >= 0) {
		showint(rMin - lMax + 1);
	} else {
		showint(0);
	}
	showint();
	return 0;
}

int getint() {
	int i;
	scanf("%d", &i);
	return i;
}

long long getllint() {
	long long i;
	scanf("%lld", &i);
	return i;
}

double getdint() {
	double i;
	scanf("%lf", &i);
	return i;
}

char getch() {
	char c;
	scanf("%c", &c);
	return c;
}

void setstring(char *s) {
	scanf("%s", s);
}

void showint(int i) {
	printf("%d\n", i);
}

void showllint(long long i) {
	printf("%lld\n", i);
}

void showdouble(double i) {
	printf("%lf\n", i);
}

void showchar(char c) {
	printf("%c\n", c);
}

void showstring(char *s) {
	printf("%s\n", s);
}


Compiler output:
main.c: In function 'main':
main.c:55:9: error: too few arguments to function 'showint'
   55 |         showint();
      |         ^~~~~~~
main.c:15:6: note: declared here
   15 | void showint(int i);
      |      ^~~~~~~
Language: C++

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

int main() {
    int N,M;
    cin >> N >> M;
    vector<int> L(M);
    vector<int> R(M);
    int L_max =  1;
    int R_min =  N;
    int ans = 0;

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

    if(L_max >= R_min){
      ans = 0;
    }else{
      ans = R_min - L_min;
    }

    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:21: error: 'L_min' was not declared in this scope; did you mean 'R_min'?
   25 |       ans = R_min - L_min;
      |                     ^~~~~
      |                     R_min
Language: C++

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

int main() {
  int N,M;
  int Lmax = -1;
  int Rmin = 100000;
  int count = 0;
  cin >> N >> M;
  vector<int> L(M);
  vector<int> R(M);
  for (int i = 0; i < M; i++) {
    cin >> L.at(i);
    cin >> R.at(i);
  }
  for(int i = 0; i < M; i++){
    if(L.at(i) >= Lmax){
      Lmax = L.at(i);
    }
    if(R.at(i) <= Rmin){
      Rmin = R.at(i);
    }
  }
  count = Rmin - Lmax;
  count = max(coun,0);
  cout << count << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:25:15: error: 'coun' was not declared in this scope; did you mean 'count'?
   25 |   count = max(coun,0);
      |               ^~~~
      |               count
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,m;
  cin>>n>>m;
  int l[m], r[m];
  for(int i=0; i<n; i++){
    cin>>l[i]>>r[i];
  }
  int k=*max_element(l, l+m);
  int m= *min_element(r, r+m);
  cout<<k-m;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:7: error: redeclaration of 'int m'
   12 |   int m= *min_element(r, r+m);
      |       ^
a.cc:5:15: note: 'int m' previously declared here
    5 |         int n,m;
      |               ^
Language: C++

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

/* #pragma */
/*
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
*/

/*alias*/
#define F first
#define S second

#define y0 y3487465
#define y1 y8687969
#define j0 j1347829
#define j1 j234892
#define next asdnext
#define prev asdprev
#define itn int

/*template*/
template<class T>inline bool amax(T &a, const T &b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>inline bool amin(T &a, const T &b) { if (b < a) { a = b; return 1; } return 0; }

/* func */
int GCD(int a,int b){return b?GCD(b,a%b):a;}
long long GCD(long long a, long long b){return b ? GCD(b, a%b) : a;}
int LCM(int a, int b){return a * b / GCD(a, b);}
long long LCM(long long a, long long b){return a * b / GCD(a, b);}

/*struct*/
struct aaa {
	aaa() {
		cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20);
	};
}aaaaaaa;

/* const */
const int INF = 1001001001;
const long long LINF = 1001001001001001001ll;
const int MOD = 1e9 + 7; //10^9
const double EPS = 1e-9;
const int dx[] = { 1, 1, 0, -1, -1, -1, 0, 1 }, dy[] = { 0, 1, 1, 1, 0, -1, -1, -1 };
//const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};
//Counterclockwise from the 6o'clock direction
//Take the x-axis downward and the y-axis right

//#define int long long

//g++ -std=c++14 -Wall --pedantic-errors -o template template.cpp
//chcp 65001

signed main()
{
	int n, m;cin >> n >> m;
	int L, M; L = 0;R = INF;
	for(int i = 0, i_len = (int)m; i < i_len; ++i){
		int l, r; cin >> l >> r;
		L = max(L, l);
		R = min(R, r);
	}

	cout << R-L+1 << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:57:25: error: 'R' was not declared in this scope
   57 |         int L, M; L = 0;R = INF;
      |                         ^
Language: C++

#include<iostream>
using namespace std ;

int main()
{
  int N,M ;
  cin>>N>>M ;
  int L[M],R[M] ;
  int i ;
  for(i=0;i<M;i+++) cin>>L[i]>>R[i] ;
  
  int left=L[0] ;
  int right=R[0] ;
  for(i=0;i<M;i++){
    if(R[i]<left||L[i]>right){
      cout<<0<<endl ;
      return 0 ;
    }else if(R[i]==left) right=left ;
    else if(L[i]==right) left=right ;
    else if(L[i]<=left) right=R[i] ;
    else{
      left=L[i] ;
      right=R[i] ;
    }
  }        
  
  cout<<right-left+1<<endl ;
      
  return 0 ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:19: error: expected primary-expression before ')' token
   10 |   for(i=0;i<M;i+++) cin>>L[i]>>R[i] ;
      |                   ^
Language: C++

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

using namespace std;

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

main(){
    int N, M, sum;
    int maxL = 0, minR = 100000;
    int L, R;
    int i, j;
    cin >> N >> M;
    FOR(i, 0, M){
        cin >> L >> R;
        if(minR >= R{ minR = R; }
        if(maxL <= L){ maxL = L; }
    }

    sum = minR - maxL + 1;
    
    cout << max(0, sum) << endl;
}

Compiler output:
a.cc:9:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    9 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:17:21: error: expected ')' before '{' token
   17 |         if(minR >= R{ minR = R; }
      |           ~         ^
      |                     )
a.cc:19:5: error: expected primary-expression before '}' token
   19 |     }
      |     ^
Language: C++

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

int main() {
  int N, M, L, R, max_l = 1, min_r = 10000;
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> N >> M;
  for (int i=0; i<M; i++)  {
	cin >> L >> R;
    max_l = max(max_l, L);
    min_r = min(min_r, R);
  }
  cout << max(min_r - max_l + 1, 0); << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:38: error: expected primary-expression before '<<' token
   14 |   cout << max(min_r - max_l + 1, 0); << endl;
      |                                      ^~
Language: Java

import java.util.*;
public class Main
{
    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];
        for(int i=0;i<M;i++){
            L[i]=sc.nextInt();
            R[i]=sc.nextInt();
        }
        int left=L[M-1;
        int right=R[0];
        for(int j=0;j<M-1;j++){
            if(L[j]<L[j+1]){
                left=L[j+1];
            }
            if(R[M-1-j]>R[M-1-j-1]){
                right=R[M-1-j-1];
            }
        }
        int result = right-left+1;
      if(result<0){
        result=0;
      }
      if(result>N){
        result=N;
      }
        System.out.println(result);
    }
}

Compiler output:
Main.java:15: error: ']' expected
        int left=L[M-1;
                      ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define pp long long int
#define pb push_back
pp a[1000005];
int main()
{
    std::ios::sync_with_stdio(false);
    cin.tie(NULL); 
    cout.tie(NULL);
   pp n,m; cin>>n>>m;
    pp a[m]; pp b[m];
    for(pp i=0;i<m;i++) cin>>a[i]>>b[i];
    pp max = *max_element(a,a+m);
    pp min = *min_element(b,b+m);
    cout<<max(abs(max-min)+1,0)<<"\n";
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:14: error: 'max' cannot be used as a function
   16 |     cout<<max(abs(max-min)+1,0)<<"\n";
      |           ~~~^~~~~~~~~~~~~~~~~~
Language: Java

Public class Main{
  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];
    for(int i=0;i<M;i++){
      L[i]=sc.nextInt();
      R[i]=sc.nextInt();
    }
    int left=L[0];
    int right=R[M-1];
    for(intj=0;j<M-1;j++){
      if(L[j]<L[j+1]){
        left=L[j+1];
      }
      if(R[M-1-j]>R[M-1-j-1]){
        right=R[M-1-j-1];
      }
    }
    int result = right-left+1;
    System.out.println(result);
  }
        

Compiler output:
Main.java:1: error: class, interface, enum, or record expected
Public class Main{
^
Main.java:24: error: reached end of file while parsing
  }
   ^
2 errors
Language: C++

#include <iostream>
using namespace std;
 
int N,n;
 
int main(){
  int i=0,n,j,max = 0,min = 10000000;
  cin >> n >> j;
  while(i < j ;){
    int li,ri;
    cin >> li >> ri;
    if(max<li)max=li;
    if(min>ri)min=ri;
    i++;
  }
  if(min < max){
    cout << 0 << endl;
  }else{
    cout << min - max + 1 << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: expected ')' before ';' token
    9 |   while(i < j ;){
      |        ~     ^~
      |              )
a.cc:9:16: error: expected primary-expression before ')' token
    9 |   while(i < j ;){
      |                ^
Language: C++

#include <iostream>
using namespace std;
 
int N,n;
 
int main(){
  int n,m,max = 0,min = 10000000;
  cin >> n >> m;
  for(int i = 0 ; i < m ; i++){
    int li,ri;
    cin >> li >> ri;
    max = max(max,li);
    min = min(min,ri);
  }
  if(min < max){
    cout << 0 << endl;
  }else{
    cout << min - max + 1 << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:14: error: 'max' cannot be used as a function
   12 |     max = max(max,li);
      |           ~~~^~~~~~~~
a.cc:13:14: error: 'min' cannot be used as a function
   13 |     min = min(min,ri);
      |           ~~~^~~~~~~~
Language: C++

#include<iostream>

using namespace std;

int main(){
    int N,M;
    int l,r;
    int l_max,r_min;
    
    cin >> N >> M;
    
    cin >> l_max >> r_min;
    
    for(int i=1;i<M;i++){
        cin >> l >> r;
        if( l  > l_max)
            l_max = l;
        if( r < r_min)
            r_min = r;
    }
    
    if( r_min > l_max){
        cout << r_min - l_max + 1 << endl;
    else
        cout << 0 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:5: error: expected '}' before 'else'
   24 |     else
      |     ^~~~
a.cc:22:23: note: to match this '{'
   22 |     if( r_min > l_max){
      |                       ^
Language: C++


#include <iostream>
 
int main(){
  int n,m;
  std::cin >> n >> m;
  int lm,rm;
  for(int i = 0; i < m ; i++){
    int il,ir;
    std::cin >> il >> ir;
    lm = std::max(il,lm);
    rm = std::min(ir,rm);
  }
  std::cout << mm - nm + 1 << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:16: error: 'mm' was not declared in this scope; did you mean 'rm'?
   14 |   std::cout << mm - nm + 1 << std::endl;
      |                ^~
      |                rm
a.cc:14:21: error: 'nm' was not declared in this scope; did you mean 'rm'?
   14 |   std::cout << mm - nm + 1 << std::endl;
      |                     ^~
      |                     rm
Language: C++

#include <iostream>
 
int main(){
  int n,m;
  std::cin >> n >> m;
  int lm,rm;
  for(int i = 0; i < m ; i++){
    int il,ir;
    std::cin >> il >> ir;
    nm = std::max(il,lm);
    mm = std::min(ir,rm);
  }
  std::cout << mm - nm + 1 << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'nm' was not declared in this scope; did you mean 'rm'?
   10 |     nm = std::max(il,lm);
      |     ^~
      |     rm
a.cc:11:5: error: 'mm' was not declared in this scope; did you mean 'rm'?
   11 |     mm = std::min(ir,rm);
      |     ^~
      |     rm
a.cc:13:16: error: 'mm' was not declared in this scope; did you mean 'rm'?
   13 |   std::cout << mm - nm + 1 << std::endl;
      |                ^~
      |                rm
a.cc:13:21: error: 'nm' was not declared in this scope; did you mean 'rm'?
   13 |   std::cout << mm - nm + 1 << std::endl;
      |                     ^~
      |                     rm
Language: C++

#include <iostream>
 
int main(){
  int n,m;
  std::cin >> n >> m;
  int nm,mm;
  for(int i = 0; i < m ; i++){
    int il,ir;
    std::cin >> il >> ir;
    nm = std::max(in,nm);
    mm = std::min(im,mm);
  }
  std::cout << mm - nm + 1 << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:19: error: 'in' was not declared in this scope; did you mean 'ir'?
   10 |     nm = std::max(in,nm);
      |                   ^~
      |                   ir
a.cc:11:19: error: 'im' was not declared in this scope; did you mean 'ir'?
   11 |     mm = std::min(im,mm);
      |                   ^~
      |                   ir
Language: C++

#include <iostream>

int main(){
  int n,m;
  std::cin >> n >> m;
  int nm,mm;
  for(int i = 0; i < m ; i++){
    int in,im;
    std::cin >> il >> ir;
    nm = std::max(in,nm);
    mm = std::min(im,mm);
  }
  std::cout << mm - nm + 1 << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'il' was not declared in this scope; did you mean 'im'?
    9 |     std::cin >> il >> ir;
      |                 ^~
      |                 im
a.cc:9:23: error: 'ir' was not declared in this scope; did you mean 'im'?
    9 |     std::cin >> il >> ir;
      |                       ^~
      |                       im
Language: C++

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

int main(){
  int n,m; cin>>n >>m;
  int maxL = 1,minR = m;
  vector<int> l(m);
  vector<int> r(m);
  
  rep(i,m){
    cin>>l.at(i) >>r.at(i);
  }
  
  rep(i,m){
    maxL = max(maxL,l.at(i));
    minR = min(minR,r.at(i));
  }
  int ans = minR - maxL;
  ans = max(0,ans);
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:7: error: 'i' was not declared in this scope
   10 |   rep(i,m){
      |       ^
a.cc:10:3: error: 'rep' was not declared in this scope
   10 |   rep(i,m){
      |   ^~~
Language: C++

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

int main(int argc, const char * argv[]) {
    int N, M;
    
    cin >> N >> M;
    vector<int> L(M);
    vector<int> R(M);
    for (int i = 0; i < M; i++) {
        cin >> L[i] >> R[i];
    }
    
    int ans = 0;
    int minv = *min_element(R.begin(), R.end());
    int maxv = *max_element(L.begin(), L.end());
    
    for (int i = 1; i <= N; i++) {
        if (maxv <= i && i <= minv) {
            ans++;
        }
    }

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

Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:16:17: error: 'min_element' was not declared in this scope
   16 |     int minv = *min_element(R.begin(), R.end());
      |                 ^~~~~~~~~~~
a.cc:17:17: error: 'max_element' was not declared in this scope
   17 |     int maxv = *max_element(L.begin(), L.end());
      |                 ^~~~~~~~~~~
Language: C++

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

int main(){
    int N,M;
    cin >> N >>M;
    int C[2*M];
    int D[M];
    int E[M];
    for(int i=0;i<2*M;i++){
         cin >> C[2*M];
    }
    for(int i=0;i<M;i++){
        D[i]=C[i*2];
          E[i]=C[i*2+1]
    }
    sort(D,D+M,greater<int>());
     sort(E,E+M,greater<int>());
     if(D[M-1]<E[0]) cout <<0;
    else cout << D[M-1]-E[0]+1;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:24: error: expected ';' before '}' token
   16 |           E[i]=C[i*2+1]
      |                        ^
      |                        ;
   17 |     }
      |     ~
Language: C

#include<stdio.h>
 
int main(){
   int n,m;
   scanf("%d %d", &n,&m);
   int lc[m],rc[m];
 	
   for(int i=0;i<m;i++){
     	scanf("%d %d ", &lc[i],&rc[i]);
   }
    int lmax = lc[0];
  	for(int i=1;i<m;i++){
     if(lmax < lc[i]){
     	lmax = lc[i];
     }
    }
  	int rmin = rc[0];
  	for(int i=1;i<m;i++){
     if(rmin < rc[i]){
     	rmin = rc[i];
     }
    }
  
  	int ans = rmin - lmax + 1
	printf("%d", ans);
      return 0;
 
}

Compiler output:
main.c: In function 'main':
main.c:25:9: error: expected ',' or ';' before 'printf'
   25 |         printf("%d", ans);
      |         ^~~~~~
Language: C


        for(i=1;i<=N;i++){
                if(i<=max&&i>=min){
                        count++;
                }
        }

        printf("%d\n",count);

        return 0;
}


Compiler output:
main.c:2:9: error: expected identifier or '(' before 'for'
    2 |         for(i=1;i<=N;i++){
      |         ^~~
main.c:2:18: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<=' token
    2 |         for(i=1;i<=N;i++){
      |                  ^~
main.c:2:23: error: expected '=', ',', ';', 'asm' or '__attribute__' before '++' token
    2 |         for(i=1;i<=N;i++){
      |                       ^~
main.c:8:16: error: expected declaration specifiers or '...' before string constant
    8 |         printf("%d\n",count);
      |                ^~~~~~
main.c:8:23: error: unknown type name 'count'
    8 |         printf("%d\n",count);
      |                       ^~~~~
main.c:10:9: error: expected identifier or '(' before 'return'
   10 |         return 0;
      |         ^~~~~~
main.c:11:1: error: expected identifier or '(' before '}' token
   11 | }
      | ^
Language: C++

#include<stdio.h>
int main() {
	int N; int M;
	scanf("%d %d", &N, &M);
	 int* L;
	 int* R;
	 L = new int[M];
	 R = new int[M];
	 for (int i = 0;i < M;i++) {
		scanf("%d%d", &L[i], &R[i]);
	}

	int max = R[0]; int min = L[0];
	
	for (int j = 0;j < M;j++) {

		if (R[j] > max) { max = R[j]; }
		if (L[j] < min) { min = L[j]; }

	}
	int x = max - min + 1;
	printf("%d\n", max - min + 1);

Compiler output:
a.cc: In function 'int main()':
a.cc:22:39: error: expected '}' at end of input
   22 |         printf("%d\n", max - min + 1);
      |                                       ^
a.cc:2:12: note: to match this '{'
    2 | int main() {
      |            ^
Language: C

#include<stdio.h>
#include<stdlib.h>
int compUp(const void* a, const void* b){
    int* A = (int*)a;
    int* B = (int*)b;
    if(*A == *B){
        A++; B++;
        return *A - *B;
    }
    else{
        return *A - *B;
    }
}

int main(void){
    int n,m;
    scanf("%d%d", &n, &m);

    int d[m][2];
    for(int i = 0; i < m; i++){scanf("%d%d", &d[i][0], &d[i][1]);}
    qsort(d, m, 2*sizeof(int), compF);
    int max, min;
    int ans[2];
    int i = 0;
    int cnt = 0;
    int flag = 1;
    for(i = 0; i < m-1; i++){
        max = d[i][1];
        min = d[i+1][0];
        if(max < min){flag = 0; break;}
        cnt++;
        d[i+1][0] = max - (max-min);
        d[i+1][1] = max;
    }
    if(cnt == 0 && m != 1){printf("0\n");}
    else if(flag == 0){printf("0\n");}
    else if(printf("%d\n", d[i][1] - d[i][0] + 1);}
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:21:32: error: 'compF' undeclared (first use in this function); did you mean 'compUp'?
   21 |     qsort(d, m, 2*sizeof(int), compF);
      |                                ^~~~~
      |                                compUp
main.c:21:32: note: each undeclared identifier is reported only once for each function it appears in
main.c:37:50: error: expected ')' before ';' token
   37 |     else if(printf("%d\n", d[i][1] - d[i][0] + 1);}
      |            ~                                     ^
      |                                                  )
main.c:37:51: error: expected expression before '}' token
   37 |     else if(printf("%d\n", d[i][1] - d[i][0] + 1);}
      |                                                   ^
main.c: At top level:
main.c:38:5: error: expected identifier or '(' before 'return'
   38 |     return 0;
      |     ^~~~~~
main.c:39:1: error: expected identifier or '(' before '}' token
   39 | }
      | ^
Language: C++

#include<iostream>
using namespace std;
 
int main(void) {
  int n,m;
  cin >> n >> m;
  int num_a[m];
  int num_b[m];
  bool flag = 1;
  for (int i = 0; i < m; i++) {
	cin >> num_a[i] >> num_b[i];
  }
  int min = num_a[0];
  int max = num_b[0];
  
  for (int i = 1; i < m; i++) {
	if (min < num_a[i]) {
      min = num_a[i];
    }
    if (max > num_b[i]) {
      max = num_b[i];
    }
    if (num_b[i] - num_a[i] > n) {
		flag = 0;
      	break;
  }
 if (flag != 0){
  	cout << max - min + 1 << endl;
 }else{
   cout << 0 << endl;
 }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:2: error: expected '}' at end of input
   32 | }
      |  ^
a.cc:4:16: note: to match this '{'
    4 | int main(void) {
      |                ^
Language: C++

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

int main(){
  int N,M,L[101000],R[101000];
  cin >> N >> M;
  for (int i = 0; i < M; i++){
    cin >> L[i] >> R[i];
  }
  for (int i = 0; i < M - 1; i++){
    int LMAX = max (L[i] , L[i+1]);
    int RMIN = min (R[i] , R[i+1]);
  }
  
  int ans = 0;
  for (int i = 1; i <= N; i++){
    if (i <= LMAX && i >= RMIN) ans++;
  }
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:14: error: 'LMAX' was not declared in this scope
   18 |     if (i <= LMAX && i >= RMIN) ans++;
      |              ^~~~
a.cc:18:27: error: 'RMIN' was not declared in this scope
   18 |     if (i <= LMAX && i >= RMIN) ans++;
      |                           ^~~~
Language: Java

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

public class Max {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N  = keyboard.nextInt();
		int M  = keyboard.nextInt();
		
		 int[] L = new int[M];
		 int[] R = new int[M];
		
		for(int i = 0; i < M ; i++) {
			L[i] = keyboard.nextInt();
			R[i] = keyboard.nextInt();
		}
		
		int min = L[0];
		int MAX = R[0];
		int ans = 0;
		
		for(int m = 0; m < M; m++) {
			
			if(min <= L[m]) {
				min = L[m];
			}
			if(MAX >= R[m]) {
				MAX = R[m];
			}
		}
		
		ans = MAX - min + 1;
		
		System.out.println(ans);
		keyboard.close();	
	}
}


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

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

#define ll long long
#define INF 99999999
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()


int main()
{
    int n,m;
    cin >> n >> m;
    vector<int> L(m);
    vector<int> R(m);
    rep(i,m)
    {
        cin >> L[i] >> R[i];
    }
    sort(all(L),greater<int>());
    sort(all(R));
    
    if(R[0] - L[0] >= 0) cout << R[0] - L[0] + 1 << endl;
    else cout << 0 < <endl;


    //rep(i,m) cout << l[i].first << "      " <<  l[i].second << endl;


}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:22: error: expected primary-expression before '<' token
   24 |     else cout << 0 < <endl;
      |                      ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
long long n1,n2=100005;
int main()
{
	int n,m;
	cin>>n>>m;
	for(int i=0;i<m;i++)
	{
		long long a,b;
		cin>>a>>b;
		if(a>n1)
		  n1=a;
		if(b<n2)
		  n2=b;
	}
	cout<<max(n2-n1+1,0);
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:18: error: no matching function for call to 'max(long long int, int)'
   17 |         cout<<max(n2-n1+1,0);
      |               ~~~^~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:17:18: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   17 |         cout<<max(n2-n1+1,0);
      |               ~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:17:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   17 |         cout<<max(n2-n1+1,0);
      |               ~~~^~~~~~~~~~~
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main(){
int a,b,c,d;
  d=0;
  cin>>a>>b;
  for(int i=0;i<b;i++){
  cin>>c[i]>>d[i]>>endl;
  }
  sort(c[i],c[i+b],greater<int>());
  sort(d[i],d[i+b]);
  for(int i=0;i<10000){
  if(c[1]=<i=<d[1]){d++;}
  }
  if(a=>d){cout<<d;}
  else cout<<a;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: invalid types 'int[int]' for array subscript
    9 |   cin>>c[i]>>d[i]>>endl;
      |         ^
a.cc:9:15: error: invalid types 'int[int]' for array subscript
    9 |   cin>>c[i]>>d[i]>>endl;
      |               ^
a.cc:11:10: error: 'i' was not declared in this scope
   11 |   sort(c[i],c[i+b],greater<int>());
      |          ^
a.cc:13:22: error: expected ';' before ')' token
   13 |   for(int i=0;i<10000){
      |                      ^
      |                      ;
a.cc:14:7: error: invalid types 'int[int]' for array subscript
   14 |   if(c[1]=<i=<d[1]){d++;}
      |       ^
a.cc:14:11: error: expected primary-expression before '<' token
   14 |   if(c[1]=<i=<d[1]){d++;}
      |           ^
a.cc:14:14: error: expected primary-expression before '<' token
   14 |   if(c[1]=<i=<d[1]){d++;}
      |              ^
a.cc:14:16: error: invalid types 'int[int]' for array subscript
   14 |   if(c[1]=<i=<d[1]){d++;}
      |                ^
a.cc:16:8: error: expected primary-expression before '>' token
   16 |   if(a=>d){cout<<d;}
      |        ^
Language: Java

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int N = scan.nextInt();// cards
        int M = scan.nextInt();// gates
        int[] L = new int[M];
        int[] R = new int[M];
        int[] counter = new int[N];
        for (int i = 0; i < M; i++) {
            L[i] = scan.nextInt();
            R[i] = scan.nextInt();
        }//O(M)
        Arrays.sort(L);
        Arrays.sort(R);
        if(L[M] > R[0]){
            System.out.print(L[m]-R[0] + 1);
        }
        else{
            System.out.print(0);
        }

    }
}

Compiler output:
Main.java:18: error: cannot find symbol
            System.out.print(L[m]-R[0] + 1);
                               ^
  symbol:   variable m
  location: class Main
1 error
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main(){
int a,b,c,d;
  d=0;
  cin>>a>>b;
  for(int i=0;i<b;i++){
  cin>>c[i]>>d[i]>>endl;
  }
  sort(c[i],c[i+b],greater<int>());
  sort(d[i],d[i+b]);
  for(int i=0;i<10000){
  if(c[1]=<i=<d[1]){d++}
  }
  if(a=>d){cout<<d;}
  else cout<<a;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: invalid types 'int[int]' for array subscript
    9 |   cin>>c[i]>>d[i]>>endl;
      |         ^
a.cc:9:15: error: invalid types 'int[int]' for array subscript
    9 |   cin>>c[i]>>d[i]>>endl;
      |               ^
a.cc:11:10: error: 'i' was not declared in this scope
   11 |   sort(c[i],c[i+b],greater<int>());
      |          ^
a.cc:13:22: error: expected ';' before ')' token
   13 |   for(int i=0;i<10000){
      |                      ^
      |                      ;
a.cc:14:7: error: invalid types 'int[int]' for array subscript
   14 |   if(c[1]=<i=<d[1]){d++}
      |       ^
a.cc:14:11: error: expected primary-expression before '<' token
   14 |   if(c[1]=<i=<d[1]){d++}
      |           ^
a.cc:14:14: error: expected primary-expression before '<' token
   14 |   if(c[1]=<i=<d[1]){d++}
      |              ^
a.cc:14:16: error: invalid types 'int[int]' for array subscript
   14 |   if(c[1]=<i=<d[1]){d++}
      |                ^
a.cc:14:24: error: expected ';' before '}' token
   14 |   if(c[1]=<i=<d[1]){d++}
      |                        ^
      |                        ;
a.cc:16:8: error: expected primary-expression before '>' token
   16 |   if(a=>d){cout<<d;}
      |        ^
Language: C++

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <ctype.h>
using namespace std;
void select(int A[], int N)
{
    int i, j,t,minj;
    for(i = 0;i< N-1; i++)
    {
    minj = i;
    for(j = i;j<N;j++)
    {
        if (A[j] < A[minj])
            minj = j;
    }
    t = A[i];
    A[i] = A[minj];
    A[minj]= t;
    }
}

int main ()
{
   int N,M;
   cin >>N>>M
   int *abc = new int;


   int *L = new int;
   int *R = new int;
   for(int i = 0; i< M;i++)
   {


     cin >>L[i]>>R[i];

   }
   select(L,M);
   select(R,M);
   int L1 = L[M-1];
   int R1 = R[0];

   int total=0;
    if(L1<=R1)
        total = R1-L1+1;
   cout << total <<endl;
   free(abc);
        return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:14: error: expected ';' before 'int'
   27 |    cin >>N>>M
      |              ^
      |              ;
   28 |    int *abc = new int;
      |    ~~~        
a.cc:49:9: error: 'abc' was not declared in this scope; did you mean 'abs'?
   49 |    free(abc);
      |         ^~~
      |         abs
Language: C++

#include<iostream>
#include<vector>

using namespace std;

int gates[100001] = { 0, };
int main()
{
	int n, m;
	int L, R;

	cin >> n >> m;
	for (int j = 0; j < m; j++) {
		cin >> L >> R;
		for (int i = L; i <= R; i++) {
			gates[i]++;
		}
	}

	int answer=0;
	for (i = 1; i <= n; i++) {
		if (gates[i] == m) answer++;
		
	}
	cout <<answer<< endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:14: error: 'i' was not declared in this scope
   21 |         for (i = 1; i <= n; i++) {
      |              ^
Language: C++

#include <iostream>
#include <iomanip>
#include <ios> 
#include <vector>
#include <string>
#include <algorithm>
#include <functional>
#include <queue>
#include <stack>
#include <set>
#include <cmath>
#include <bitset>
#include <map>
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)
#define sz(c) ((int)(c).size())

using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
//const int MAX=;



int main(){
	int N,M;
	cin>>N>>M;
	int lm=0,rm=N;
	rep(i,M){
		int l,r;
		cin>>l>>r;
		lm=max(lm,l);
		rm=min(rm,r);
	}
	cout<<max(0,rm-lm+1);
	
	}
}

Compiler output:
a.cc:39:1: error: expected declaration before '}' token
   39 | }
      | ^
Language: C++

#include<iostream>
using namespace std;
int main()
{
  int n,m;
  cin>>n>>m;
  int a[m],b[m];
  for(int i=0;i<m;++i)
  {
    cin>>a[i]>>b[i];
  }
  sort(a,a+m);
  sort(b,b+m);
  if(b[0]<a[m-1]) cout<<"0";
 	else
      cout<<b[0]-a[m-1]+1;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |   sort(a,a+m);
      |   ^~~~
      |   short
Language: C++

/**
        	C++14 (GCC 5.4.1)
**/
#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <set>
using namespace std;
 
int main(){
    int N, M;
    cin >> N >> M;
    
    vector<int> L(M);
    vector<int> R(M);
    vector<int> Gate(M,1);
    int count = 0;
 
    for(int i = 0 ; i < M ; i++){
        cin >> L[i] >> R[i];
    }
 
    int LL = *std::max_element(L.begin(),L.end());
    int RR = *std::min_element(R.begin(),R.end());
 
 
    cout << abs( RR - LL ) + 1  << endl;
 
    
    return 0;
}
/**
        	C++14 (GCC 5.4.1)
**/
#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <set>
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[i] >> R[i];
    }

    int LL = *std::max_element(L.begin(),L.end());
    int RR = *std::min_element(R.begin(),R.end());

    if(LL <= RR){
        cout <<  RR - LL  + 1  << endl;
    }
    else{
        cout<< 0 << endl;
    }
    
    return 0;
}


Compiler output:
a.cc:45:5: error: redefinition of 'int main()'
   45 | int main(){
      |     ^~~~
a.cc:12:5: note: 'int main()' previously defined here
   12 | int main(){
      |     ^~~~
Language: C++

#include <iostream>
using namespace std;
  
int main(void) {
  int card_count, gate_count, c_start=1, c_end;
  
  cin >> card_count;
  cin >> gate_count;
  c_end = card_count;
  
//  cout << "card_count:" << card_count << ", gate_count:" << gate_count << "\n";
  
  for(int l=0; l < gate_count; l++) {
    int s, e;
    cin >> s;
    cin >> e;
    
    if(c_start < s) {
      c_start = s;
    }
    if(c_end > e) {
      c_end = e;    
    }
  }
  
  for(int n=c_start-1; n < c_end-1; n++) {
    all_count++;
  }
  
  cout << all_count << "\n";
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:5: error: 'all_count' was not declared in this scope; did you mean 'gate_count'?
   27 |     all_count++;
      |     ^~~~~~~~~
      |     gate_count
a.cc:30:11: error: 'all_count' was not declared in this scope; did you mean 'gate_count'?
   30 |   cout << all_count << "\n";
      |           ^~~~~~~~~
      |           gate_count
Language: Java

import java.util.*;
public class Main {
	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];

        for(int i=0; i<m; i++){
          l[i] = sc.nextInt();
          r[i] = sc.nextInt();
        }
        int lMax = l[0];
        int rMin = r[0];
        for(int i=1; i<m; i++){
          if(lMax < l[i]) lMax = l[i];
          if(rMin > r[i]) rMin = r[i];
        }
        if(rMin-lMax<0) System.out.println("0")
        else System.out.println(rMin-lMax+1);
	}
}

Compiler output:
Main.java:20: error: ';' expected
        if(rMin-lMax<0) System.out.println("0")
                                               ^
1 error
Language: C++

#include <iostream>
// #include <set>
//#include <pair>
#include <cstdio>
using namespace std;
#define rep(i,a,b) for(int i=a; i<b; i++)
int n, m;
int l[1000000], r[1000000];

int get_min(int i) {
  int ret = INT_MAX;
  for (int x = i; x <= m; x++) {
    ret = min(ret,l[i]);
  }
  return ret;
}
int get_max(int i) {
  int ret = -1;
  for (int x = i; x <= m; x++) {
    ret = max(ret,l[i]);
  }
  ret = max(r[i],ret);
  return ret;
}


int main() {
  scanf("%d %d", &n, &m);

  for (int i = 1; i <= m; i++) {
    scanf("%d %d", &l[i], &r[i]);
  }

  bool is_empty = false;
  pair<int, int> rst_pair = make_pair<int,int>(-1,-1);
  for (int i = 1; i <= m; i++) {
    if (is_empty)
      break;

    // printf("%d %d\n", l[i], r[i]);
    if (rst_pair.first == -1) {
      //rst_pair.first  = l[i];
      rst_pair.first  = get_min(i);
      //rst_pair.second = r[i];
      rst_pair.second = get_max(i);
    } else {
      int begin = max(get_min(i),rst_pair.first);
      int end   = min(get_max(i),rst_pair.second);
      if (begin > end) {
        is_empty = true;
        rst_pair.first  = -1;
        rst_pair.second = -1;
      }
      rst_pair.first  = begin;
      rst_pair.second = end;
    }
  }
  if (rst_pair.first == -1) {
    printf("0\n");
  } else {
    if (rst_pair.first==0 && rst_pair.second==0) {
      printf("0\n");
    } else {
      printf("%d\n", (rst_pair.second-rst_pair.first+1));
    }
  }

#if 0
  pair<int, int> tmp_pair = make_pair<int,int>(1,2);
  printf("%d %d", tmp_pair.first, tmp_pair.second);
#endif

#if 0
  set<int > rst_set = set<int >();
  for (int i = 1; i <= m; i++) {
    set<int > tmp_set = set<int >();
    // printf("%d\n", i);
    for (int j = l[i]; j<= r[i]; j++) {
      if (rst_set.empty()) {
        rst_set.insert(j);
      } else {
        tmp_set.insert(j);
      }
    }
    if (! tmp_set.empty()) {
      rst_set = rst_set & tmp_set ;
    }
  }
  printf("%d\n", rst_set.size());
#endif
#if 0
  printf("%d %d\n", n, m);
  for (int i = 1; i <= m; i++) {
    printf("%d %d\n", l[i], r[i]);
  }
#endif

  return 0;
}

Compiler output:
a.cc: In function 'int get_min(int)':
a.cc:11:13: error: 'INT_MAX' was not declared in this scope
   11 |   int ret = INT_MAX;
      |             ^~~~~~~
a.cc:5:1: note: 'INT_MAX' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    4 | #include <cstdio>
  +++ |+#include <climits>
    5 | using namespace std;
Language: C

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

#define _CRT_SECURE_NO_WARNINGS
#define TLong long long
#define TBMod 1000000007

int main(int argc, char const *argv[])
{
	int n,m;
	int l[100003],r[100003],cl[100003],cr[100003];
	int pcnt = 0,cnt = 0;
	scanf("%d%d",&n,&m);
	for (int i = 0; i < m; ++i){
		scanf("%d%d",&l[i],&r[i]);
		cl[i] = l[i];
		cr[i] = r[i];
	}
	qsort(l,m,sizeof(int),DESC);
	qsort(r,m,sizeof(int),ASC);
	for (int i = l[0]; i <= r[0]; ++i)
	{
	  pcnt = 0;
		for (int j = 0; j < m; ++j)
		{
			if(cl[j] <= i && i <= cr[j])	++pcnt;
		}
		if(pcnt == m) ++cnt;
	}
	printf("%d\n", cnt);
	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:22:31: error: 'DESC' undeclared (first use in this function)
   22 |         qsort(l,m,sizeof(int),DESC);
      |                               ^~~~
main.c:22:31: note: each undeclared identifier is reported only once for each function it appears in
main.c:23:31: error: 'ASC' undeclared (first use in this function)
   23 |         qsort(r,m,sizeof(int),ASC);
      |                               ^~~
Language: Java

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

public class C {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int M = sc.nextInt();

        int[] key = new int[N];
        int[] L = new int[M];
        int[] R = new int[M];

        for (int i = 0; i < M; i++) {
            L[i] = sc.nextInt();
            R[i] = sc.nextInt();
        }

        Arrays.sort(R);
        Arrays.sort(L);

        System.out.println(R[M - 1] - L[0]);

        sc.close();

    }
}

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

#include<iostream>
#include<vector>

using namespace std;

int gates[100001] = { 0, };
int main()
{
	int n, m;
	int L, R;
	vector<Card> card;

	cin >> n >> m;
	for (int j = 0; j < m; j++) {
		cin >> L >> R;
		for (int i = L; i <= R; i++) {
			gates[i]++;
		}
	}

	int answer=0;
	for (i = 1; i < m; i++) {
		if (gates[i] == n) answer++;
		
	}
	cout <<answer<< endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: 'Card' was not declared in this scope
   11 |         vector<Card> card;
      |                ^~~~
a.cc:11:20: error: template argument 1 is invalid
   11 |         vector<Card> card;
      |                    ^
a.cc:11:20: error: template argument 2 is invalid
a.cc:22:14: error: 'i' was not declared in this scope
   22 |         for (i = 1; i < m; i++) {
      |              ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: conflicting declaration 'int L [M]'
    6 |     int L[M],R[M],x;
      |         ^
a.cc:4:13: note: previous declaration as 'int L'
    4 |     int N,M,L=0,R=0;
      |             ^
a.cc:6:14: error: conflicting declaration 'int R [M]'
    6 |     int L[M],R[M],x;
      |              ^
a.cc:4:17: note: previous declaration as 'int R'
    4 |     int N,M,L=0,R=0;
      |                 ^
a.cc:8:22: error: invalid types 'int[int]' for array subscript
    8 |         std::cin >> L[i] >>R[i];
      |                      ^
a.cc:8:29: error: invalid types 'int[int]' for array subscript
    8 |         std::cin >> L[i] >>R[i];
      |                             ^
a.cc:11:15: error: invalid types 'int[int]' for array subscript
   11 |         if(L<L[i]){
      |               ^
a.cc:12:16: error: invalid types 'int[int]' for array subscript
   12 |             L=L[i];
      |                ^
a.cc:14:15: error: invalid types 'int[int]' for array subscript
   14 |         if(R<R[i]){
      |               ^
a.cc:15:16: error: invalid types 'int[int]' for array subscript
   15 |             R=R[i];
      |                ^
Language: C++

#include<iostream>
using namespace std;
int main()
{
    // 整数の入力
    int N,k;
    cin >> N >> k;
    // スペース区切りの整数の入力
    int cand[N];
    for (int i=0;i<N;i++){
      cand[i]=0
    }
    
  
    int b,c;
    for (int i=0;i<k;i++){
    cin >> b >> c;
      for (int j=b;j<=c;j++){
        cand[j-1]+=1;
      }
    }
    int s=0;
    for (int i=0;i<N;i++){
      
      if (cand[i]==k){
        s+=1;
      }
    }
    cout << s << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: expected ';' before '}' token
   11 |       cand[i]=0
      |                ^
      |                ;
   12 |     }
      |     ~
Language: C++

#include<iostream>
using namespace std;
 
int main(void) {
  int n,m;
  cin >> n >> m;
  int num_a[m];
  int num_b[m];
  bool flag = 1;
  for (int i = 0; i < m; i++) {
	cin >> num_a[i] >> num_b[i];
  }
  int min = num_a[0];
  int max = num_b[0];
  
  for (int i = 1; i < m; i++) {
	if (min < num_a[i]) {
      min = num_a[i];
    }
    if (max > num_b[i]) {
      max = num_b[i];
    }
    if (num_b[i] - num_a[i] > n) {
		flag = 0;
  }
 if (flag != 0){
  	cout << max - min + 1 << endl;
 }else{
   cout << 0 << endl;
 }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:2: error: expected '}' at end of input
   31 | }
      |  ^
a.cc:4:16: note: to match this '{'
    4 | int main(void) {
      |                ^
Language: C++

    #include<iostream>
    using namespace std;
     
    int main()
    {
      int N, M, L, R; 
      int L_max = 0, R_min = N;
      cin >> N >> M;
      for(int i = 0; i < M; i++)
      {
        cin >> L >> R;
        L--;
        if(L > L_max && L < R_max)
          L_max = L;
        if(R < R_min && R > L_max )
          R_min = R;
      }
      cout << R_min - L_max << endl;
      return 0;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:13:29: error: 'R_max' was not declared in this scope; did you mean 'L_max'?
   13 |         if(L > L_max && L < R_max)
      |                             ^~~~~
      |                             L_max
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());
    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<iostream>
using namespace std;
int main(){
 int n,m;
 cin >> n >> m;
 int ar[m],br[m];
 int a,b,i,j;
for(i=0;i<m;i++){
 cin >> a >> b;
 ar[i]=a;
 br[i]=b;
}
int startnum=ar[0];
int endnum=br[0];
int s=1;
for(i=1;i<m;i++){
  if(startnum<=ar[i] && endnum>=ar[i]){
   startnum=ar[i];
}
 if(endnum >=br[i] && br[i]>=startnum){
  endnum=br[i];
}
if(endnum<ar[i] || startnum>br[i]){
s=0;
}
if(s==0){
 cout<<s<<endl;
}else{
cout<<(endnum-startnum+1)<<endl;
}
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:2: error: expected '}' at end of input
   32 | }
      |  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
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;
}
#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:
a.cc:32:5: error: redefinition of 'int main()'
   32 | int main(){
      |     ^~~~
a.cc:5:5: note: 'int main()' previously defined here
    5 | int main(){
      |     ^~~~
Language: C++

#include<iostream>
using namespace std;
int main(){
  int n,m,l,r,a,b,ans;
  cin >> n >> m;
  for(int i=0;i<m;i++){
    cin >> l >> r;
    if(i==0){
      a=l;
      b=r;
    }
    if(l>a) a=l;
    if(r<b) b=r;
  }
  if(b-a<0) ans=0;
  else      ans=b-a+1
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:22: error: expected ';' before 'cout'
   16 |   else      ans=b-a+1
      |                      ^
      |                      ;
   17 |   cout << ans << endl;
      |   ~~~~
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: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