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

#include <bits/stdc++.h>
using namespace std;
/*{{{*/  //template
#define rep(i,n) for(int i=0;i<n;i++)
constexpr int INF = numeric_limits<int>::max()/2;
constexpr long long LINF = numeric_limits<long long>::max()/3;
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define all(v) (v).begin(),(v).end()
#define sz(x) (int)(x).size()
#define debug(x) cerr<<#x<<":"<<x<<endl
#define debug2(x,y) cerr<<#x<<","<<#y":"<<x<<","<<y<<endl
//struct fin{ fin(){ cin.tie(0); ios::sync_with_stdio(false); } } fin_;
struct Double{ double d; explicit Double(double x) : d(x){} };
ostream& operator<<(ostream& os,const Double x){ os << fixed << setprecision(20) << x.d; return os; }
template<typename T> ostream& operator<<(ostream& os,const vector<T>& vec){ os << "["; for(const auto& v : vec){ os << v << ","; } os << "]"; return os; }
template<typename T,typename U> ostream& operator<<(ostream& os,const pair<T,U>& p){ os << "(" << p.first << ","<< p.second <<")"; return os; }
template<typename T> ostream& operator<<(ostream& os,const set<T>& st){ os<<"{"; for(T v:st) os<<v<<","; os <<"}"; return os; }
template<typename T,typename U> inline void chmax(T &x,U y){ if(y>x) x = y; }
template<typename T,typename U> inline void chmin(T &x,U y){ if(y<x) x = y; }
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
ll gcd(ll a,ll b){ if(b==0) return a; else return gcd(b,a%b); }
//constexpr double eps = 1e-14; 
constexpr double eps = 1e-10; 
constexpr ll mod = 1e9+7;
const int dx[]={1,0,-1,0} ,dy[] = {0,1,0,-1};
/*}}}*/

int main(){
    string N;
    cin >> N;

    string nn = N;
    reverse(nn);
    if(N == nn){
        cout << "Yes" << endl;
    }else{
        cout << "No" << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:12: error: no matching function for call to 'reverse(std::string&)'
   41 |     reverse(nn);
      |     ~~~~~~~^~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h:1083:5: note: candidate: 'template<class _BIter> void std::reverse(_BIter, _BIter)'
 1083 |     reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
      |     ^~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1083:5: note:   candidate expects 2 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note: candidate: 'template<class _ExecutionPolicy, class _BidirectionalIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::reverse(_ExecutionPolicy&&, _BidirectionalIterator, _BidirectionalIterator)'
  249 | reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last);
      | ^~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note:   candidate expects 3 arguments, 1 provided
Language: C

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


int main()
{
    int n;
    scanf("%d",&n);
    if((n/100)==(n%100)printf("Yes\n");
    else printf("No\n");


    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:9:24: error: expected ')' before 'printf'
    9 |     if((n/100)==(n%100)printf("Yes\n");
      |       ~                ^~~~~~
      |                        )
main.c:14:1: error: expected expression before '}' token
   14 | }
      | ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

#define INF 1001000100010001000
#define MOD 1000000007
#define EPS 1e-10
#define int long long
#define rep(i, N) for (int i = 0; i < N; i++)
#define Rep(i, N) for (int i = 1; i < N; i++)
#define For(i, a, b) for (int i = (a); i < (b); i++)
#define pb push_back
#define eb emplece_back
#define mp make_pair
#define i_i pair<int, int>
#define vi vector<int>
#define vvi vector<vi >
#define vb vector<bool>
#define vvb vector<vb >
#define vp vector< i_i >
#define all(a) (a).begin(), (a).end()
#define Int(x) int x; scanf("%lld", &x);
#define int2(x, y) int x, y; scanf("%lld %lld", &x, &y);
#define int3(x, y, z) Int(x); int2(y, z);
#define fir first
#define sec second
#define ffir first.first
#define fsec first.second
#define sfir second.first
#define ssec second.second

//int dxy[5] = {0, 1, 0, -1, 0};
// assign avl ncm dijkstra geo2 kruskal graph uf lca BIT
// matrix dinic next_combination topcoder lcm

signed main()
{
    string st;
    cin >> st;
    if (st[0] == st[2]) {
        std::cout << "Yes" << std::endl;
    } else {
        std::cout << "No" << std::endl;

    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:46:2: error: expected '}' at end of input
   46 | }
      |  ^
a.cc:37:1: note: to match this '{'
   37 | {
      | ^
Language: C++

#include <iostream>
#include <alogirthm>
using namespace std;
int main()
{
  int A, B, C, D;
  cin >> A >> B >> C >> D;
  int st = max(A, C);
  int en = min(B, D);
  cout << max(0, en-st) << endl;
  return 0;
}



Compiler output:
a.cc:2:10: fatal error: alogirthm: No such file or directory
    2 | #include <alogirthm>
      |          ^~~~~~~~~~~
compilation terminated.
Language: C++

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

int main(){
int a,b,c,d;
  cin >> a >> b >> c >> d;
if(b<=c)cout << 0 << endl;  
else{
int s=max(a,c);
int t=min(b,d);
  cout << t-s << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:2: error: expected '}' at end of input
   12 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main(){
int a,b,c,d;
if(b<=c)cout << 0 << endl;  
else{
int s=max(a,c);
int t=min(b,d);
  cout << t-s << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:2: error: expected '}' at end of input
   11 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#define rep(i,n) for(int i = 0; i , (n); ++i)
using ll = long long;
using namespace std;
int sum(int n) {
    if (n == 0) {
        return 0;
    }

    int s = sum(n - 1);
    return s + n;
}
int main() {
    int A, B, C, D, E, F;
    cin >> A >> B >> C >> D;
    E = max(A, C);
    F = min(B, D);
    cout << F - E;

Compiler output:
a.cc: In function 'int main()':
a.cc:20:19: error: expected '}' at end of input
   20 |     cout << F - E;
      |                   ^
a.cc:15:12: note: to match this '{'
   15 | int main() {
      |            ^
Language: C++

#include <iostream>
#include <vector>
#define rep(i,n) for(int i = 0; i , (n); ++i)
using ll = long long;
using namespace std;
using namespace std::numeric_limits;

int sum(int n) {
    if (n == 0) {
        return 0;
    }

    int s = sum(n - 1);
    return s + n;
}
int main() {
    int A, B, C, D, E, F;
    cin >> A >> B >> C >> D;
    E = max(A, C);
    F = min(B, D);
    cout << F - E;
}

Compiler output:
a.cc:6:22: error: 'numeric_limits' is not a namespace-name
    6 | using namespace std::numeric_limits;
      |                      ^~~~~~~~~~~~~~
Language: C++

int main() {
  int a,b,c,d;
  cin >> a >> b >> c >> d;

  cout << max(0, min(b,d) - max(a,c)) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> a >> b >> c >> d;
      |   ^~~
a.cc:5:3: error: 'cout' was not declared in this scope
    5 |   cout << max(0, min(b,d) - max(a,c)) << endl;
      |   ^~~~
a.cc:5:18: error: 'min' was not declared in this scope; did you mean 'main'?
    5 |   cout << max(0, min(b,d) - max(a,c)) << endl;
      |                  ^~~
      |                  main
a.cc:5:29: error: 'max' was not declared in this scope
    5 |   cout << max(0, min(b,d) - max(a,c)) << endl;
      |                             ^~~
a.cc:5:11: error: 'max' was not declared in this scope
    5 |   cout << max(0, min(b,d) - max(a,c)) << endl;
      |           ^~~
a.cc:5:42: error: 'endl' was not declared in this scope
    5 |   cout << max(0, min(b,d) - max(a,c)) << endl;
      |                                          ^~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;
typedef long long int ll;
typedef pair<int, int> ii;
#define DEBUG freopen("in.txt", "r", stdin);

struct fastio {
    fastio() {
        ios::sync_with_stdio(false);
        cout << setprecision(10) << fixed;
        cin.tie(0);
    }
};

fastio _fast_io;

const int N = 1e5 + 5;
int n, m, k, ans;

int main() {
    cin >> a >> b >> c >> d;
    int ans = max(0, min(a, c) - max(b, d));
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:12: error: 'a' was not declared in this scope
   22 |     cin >> a >> b >> c >> d;
      |            ^
a.cc:22:17: error: 'b' was not declared in this scope
   22 |     cin >> a >> b >> c >> d;
      |                 ^
a.cc:22:22: error: 'c' was not declared in this scope
   22 |     cin >> a >> b >> c >> d;
      |                      ^
a.cc:22:27: error: 'd' was not declared in this scope
   22 |     cin >> a >> b >> c >> d;
      |                           ^
Language: C++

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

int main()
{
  int a,b,c,d;
  cin >> a >> b >> c >> d;
  
  int lower = max(a,c);
  int upper = min(b,d);
  
  count << max(0,upper - lower) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:9: error: invalid operands of types '<unresolved overloaded function type>' and 'const int' to binary 'operator<<'
   12 |   count << max(0,upper - lower) << endl;
      |   ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Language: C++

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

using ll = long long;

const int INF = 1001001001;
const ll INF_LL = 1001001001001001001LL;

int main(void){
  int a,b,c,d; cin >> a >> b >> c >> d;
  int ans = max(a,c)>min(b,d) ? min(b,d)-max(a,c):0
  
  cout << ans << endl;
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:3: error: expected ',' or ';' before 'cout'
   14 |   cout << ans << endl;
      |   ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a, b, c, d;
  cin >>a >>b >>c >>d;
  
  int ans;
  
  if (a<=c && c<=b) {
    if (b <= d)
      ans = (b-a) - (b-c);
    else
      ans = (b-a) - (d-c);
  }
  
  else if (a<=d && d<=b) {
    if (c <= a)
      ans = (b-a) - (d-a);
    else
      ans = (b-a) - (d-c)
  }
  
  else
    ans = 0;
    
  cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:26: error: expected ';' before '}' token
   21 |       ans = (b-a) - (d-c)
      |                          ^
      |                          ;
   22 |   }
      |   ~
Language: C++

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

int main() {
  int a,b,c,d,s,e;
  cin >> a >> b >> c >> d;
  s= max(a,c);
  e=min(b,d);
  cout << (e-s>0 ? e-s : 0) << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:9:37: error: expected '}' at end of input
    9 |   cout << (e-s>0 ? e-s : 0) << endl;
      |                                     ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

int main() {
  int A,B,C,D;
  cin >> A >> B >> C >> D;
  int lower = max(A,C);
  int upper = min(B,D);
  if (lower<upper) cout << upper-lower<<endl;
  if (upper<=lower) cout << 0 endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:30: error: expected ';' before 'endl'
   10 |   if (upper<=lower) cout << 0 endl;
      |                              ^~~~~
      |                              ;
Language: C++

int main(void) {
  int A,B,C,D;
  cin >> A >> B >> C >> D;
  int lower = max(A,C);
  int upper = min(B,D);
  if (lower<upper) cout << upper-lower<<endl;
  if (upper<=lower) cout << 0 endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> A >> B >> C >> D;
      |   ^~~
a.cc:4:15: error: 'max' was not declared in this scope
    4 |   int lower = max(A,C);
      |               ^~~
a.cc:5:15: error: 'min' was not declared in this scope; did you mean 'main'?
    5 |   int upper = min(B,D);
      |               ^~~
      |               main
a.cc:6:20: error: 'cout' was not declared in this scope
    6 |   if (lower<upper) cout << upper-lower<<endl;
      |                    ^~~~
a.cc:6:41: error: 'endl' was not declared in this scope
    6 |   if (lower<upper) cout << upper-lower<<endl;
      |                                         ^~~~
a.cc:7:21: error: 'cout' was not declared in this scope
    7 |   if (upper<=lower) cout << 0 endl;
      |                     ^~~~
Language: C++

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

int main() {
  int A,B,C,D ;
  cin >> A >> B >> C >> D;
  int ans =0;
  if (B>C) ans = B-C;
  else if (D>A) ans =D-A;
  else ans = 0;
  cout << ans << endl
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:22: error: expected ';' before '}' token
   11 |   cout << ans << endl
      |                      ^
      |                      ;
   12 | }
      | ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B,C,D,X=0;
  cin >> A >> B >> C >> D;
  X += min(B,D)-max(A,C);
  if(X < 0){
    cout << 0 << endl;
    reutrn 0;
  }
  cout << X << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'reutrn' was not declared in this scope
   10 |     reutrn 0;
      |     ^~~~~~
Language: Java

package practice;


import java.util.*;

public class AC70B {
	public static void main (String[] args)
	{
		Scanner in = new Scanner (System.in);
		int[] A= new int[2];
		int[] B  = new int[2];
		int max_low=0;
		int min_high=0;
		
		for(int i=0; i<2; i++)
		{
			A[i]=in.nextInt();
		}
		for(int i=0; i<2; i++)
		{
			B[i]=in.nextInt();
		}
		
		max_low=Math.max(A[0],B[0]);
		min_high= Math.min(A[1],B[1]);
		
		if (max_low>min_high)
			System.out.println("0");
		
		else
			System.out.println(min_high-max_low);
		
		
	}
}


Compiler output:
Main.java:6: error: class AC70B is public, should be declared in a file named AC70B.java
public class AC70B {
       ^
1 error
Language: Java

import java.util.*;

public class AC70B {
	public static void main (String[] args)
	{
		Scanner in = new Scanner (System.in);
		int[] A= new int[2];
		int[] B  = new int[2];
		int max_low=0;
		int min_high=0;
		
		for(int i=0; i<2; i++)
		{
			A[i]=in.nextInt();
		}
		for(int i=0; i<2; i++)
		{
			B[i]=in.nextInt();
		}
		
		max_low=Math.max(A[0],B[0]);
		min_high= Math.min(A[1],B[1]);
		
		if (max_low>min_high)
			System.out.println("0");
		
		else
			System.out.println(min_high-max_low);
		
		
	}
}


Compiler output:
Main.java:3: error: class AC70B is public, should be declared in a file named AC70B.java
public class AC70B {
       ^
1 error
Language: Java

public class AC70B {
	public static void main (String[] args)
	{
		Scanner sc = new Scanner (System.in);
		int[] A= new int[2];
		int[] B  = new int[2];
		int max_low=0;
		int min_high=0;
		
		for(int i=0; i<2; i++)
		{
			A[i]=sc.nextInt();
		}
		for(int i=0; i<2; i++)
		{
			B[i]=sc.nextInt();
		}
		
		max_low=Math.max(A[0],B[0]);
		min_high= Math.min(A[1],B[1]);
		
		if (max_low>min_high)
			System.out.println("0");
		
		else
			System.out.println(max_low-min_high);
		
		
	}
}


Compiler output:
Main.java:1: error: class AC70B is public, should be declared in a file named AC70B.java
public class AC70B {
       ^
Main.java:4: error: cannot find symbol
		Scanner sc = new Scanner (System.in);
		^
  symbol:   class Scanner
  location: class AC70B
Main.java:4: error: cannot find symbol
		Scanner sc = new Scanner (System.in);
		                 ^
  symbol:   class Scanner
  location: class AC70B
3 errors
Language: C++

#include<bits/stdc++.h>
#define REP(i, n) for(int i = 0; i < n; i++)
#define REPR(i, n) for(int i = n; i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)
#define EPS (1e-7)
#define INF (1e9)
#define PI (acos(-1))
typedef long long ll;

using namespace std;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    int max=max(a,c);
    int min=min(b,d);
    if(min-max>0)cout << min-max << endl;
    else cout << 0 << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:16: error: 'max' cannot be used as a function
   18 |     int max=max(a,c);
      |             ~~~^~~~~
a.cc:19:16: error: 'min' cannot be used as a function
   19 |     int min=min(b,d);
      |             ~~~^~~~~
Language: C

#include <stdio.h>

int main(void)
{
        int a,b,c,d,max,min;
        scanf("%d%d%d%d".&a,&b,&c,&d);

        if(a>c)max=a;
        else min=c;
        if(b<d)min=b;
        else min=d;
        if(min>=max)printf("%d\n",min-max);
        else printf("0\n");
        return 0;
}


Compiler output:
main.c: In function 'main':
main.c:6:26: error: expected identifier before '&' token
    6 |         scanf("%d%d%d%d".&a,&b,&c,&d);
      |                          ^
Language: C++

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

int main() {
    int A, B, C, D;
    cin >> A >> B >> C >> D;

    if(B <= C || D <= A) cout << 0 << endl;
    else if(A <= C && D <= B) cout << D-C << endl;
    else if(B <= A && B <= D) cout << B-A << endl;
    else if(B < D) cout << B-C << endl;
    else << D-A << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:10: error: expected primary-expression before '<<' token
   12 |     else << D-A << endl;
      |          ^~
Language: C++

#include <cstdlib>

using namespace std;

int main(){
  int a, b, c, d;
  cin >> a >> b >> c >> d;

  int sec = 0;
  if(a < c){
    if(b <= c) {
      sec = 0;
    } else {
      sec = min(b,d) - c;
    }
  } else {
    if (d <= a) {
      sec = 0;
    } else {
      sec = min(b,d) -a;
    }
  }
  cout << sec << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope
    7 |   cin >> a >> b >> c >> d;
      |   ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <cstdlib>
  +++ |+#include <iostream>
    2 | 
a.cc:14:13: error: 'min' was not declared in this scope; did you mean 'main'?
   14 |       sec = min(b,d) - c;
      |             ^~~
      |             main
a.cc:20:13: error: 'min' was not declared in this scope; did you mean 'main'?
   20 |       sec = min(b,d) -a;
      |             ^~~
      |             main
a.cc:23:3: error: 'cout' was not declared in this scope
   23 |   cout << sec << endl;
      |   ^~~~
a.cc:23:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:23:18: error: 'endl' was not declared in this scope
   23 |   cout << sec << endl;
      |                  ^~~~
a.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    1 | #include <cstdlib>
  +++ |+#include <ostream>
    2 |
Language: C++

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

#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rep2(i,s,n) for(int i = (s); i < (n); ++i)
#define ll long long
#define ld long double
#define P pair<ll,ll>
#define all(v) v.begin(),v.end()

const ll mod = 1e9+7;
const ll INF = 1e18;
const double pi = acos(-1.0);

int main(void)
{
    ll a,b,c,d; cin>>a>>b>>c>>d;
    ll low=max(a,c),up=min(b,d);
    cout<<max(0,up-low)<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:14: error: no matching function for call to 'max(int, long long int)'
   19 |     cout<<max(0,up-low)<<endl;
      |           ~~~^~~~~~~~~~
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:19:14: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   19 |     cout<<max(0,up-low)<<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:
/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:19:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   19 |     cout<<max(0,up-low)<<endl;
      |           ~~~^~~~~~~~~~
Language: C++

#include<bits/stdc++.h>
#include<cstdlib>
#include<cmath>
using namespace std;
int main(){
  int A; int B; int C; int D;
  cin>>A>>B>>C>>D;
 if(B<C||A>D)
   cout<<0<<endl;
  else{
    cout<<min(D-B)-max(A,C)<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:14: error: no matching function for call to 'min(int)'
   11 |     cout<<min(D-B)-max(A,C)<<endl;
      |           ~~~^~~~~
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:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   template argument deduction/substitution failed:
a.cc:11:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   11 |     cout<<min(D-B)-max(A,C)<<endl;
      |           ~~~^~~~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   candidate expects 2 arguments, 1 provided
Language: C++

#include<bits/stdc++.h>
#include<cstdlib>
#include<cmath>
using namespace std;
int main(){
  int A; int B; int C; int D;
  cin>>>A>>B>>C>>D;
  int H=max(B,D); int L=min(A,C);
  int T=0;
  for(int i=L; i<H+1; i++){
    if(i>=A&&i<=B&&i>=C&&i<=D)
      T++;
    else continue;
  }
  cout<<T<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:8: error: expected primary-expression before '>' token
    7 |   cin>>>A>>B>>C>>D;
      |        ^
Language: C++

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

int main(void)
{
    int A, B, C, D;
    cin >> A >> B >> C >> D;
    int sec = 0;
    if (C < B && A < D)
    {
        if (A == C && B == D)
            sec = B - A; // or D - C
        else if (A < C && B > D)
            sec = D - C;
        els

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: 'els' was not declared in this scope
   15 |         els
      |         ^~~
a.cc:15:12: error: expected '}' at end of input
   15 |         els
      |            ^
a.cc:10:5: note: to match this '{'
   10 |     {
      |     ^
a.cc:15:12: error: expected '}' at end of input
   15 |         els
      |            ^
a.cc:5:1: note: to match this '{'
    5 | {
      | ^
Language: C++

int main(){
	int a, b, c, d;
	cin >> a >> b >> c >> d;
	if (a<=c and c<=b and b<=d) cout << b-c << endl; //acbd
	else if (c<=a and a<=d and d<=b) cout <<d-a<<endl;//cadb
	else if (c>=b) cout << 0 << endl;//ab - cd
	else if (a>=d)cout << 0 << endl;//cd - ab
	else if (a<=c and c<=d and d<=b) cout << d-c << endl; //a c d b
	else if (c<=a and a<=b and b<=d) cout << b-a << endl; //c a b d
	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:9: error: 'cin' was not declared in this scope
    3 |         cin >> a >> b >> c >> d;
      |         ^~~
a.cc:4:37: error: 'cout' was not declared in this scope
    4 |         if (a<=c and c<=b and b<=d) cout << b-c << endl; //acbd
      |                                     ^~~~
a.cc:4:52: error: 'endl' was not declared in this scope
    4 |         if (a<=c and c<=b and b<=d) cout << b-c << endl; //acbd
      |                                                    ^~~~
a.cc:5:42: error: 'cout' was not declared in this scope
    5 |         else if (c<=a and a<=d and d<=b) cout <<d-a<<endl;//cadb
      |                                          ^~~~
a.cc:5:54: error: 'endl' was not declared in this scope
    5 |         else if (c<=a and a<=d and d<=b) cout <<d-a<<endl;//cadb
      |                                                      ^~~~
a.cc:6:24: error: 'cout' was not declared in this scope
    6 |         else if (c>=b) cout << 0 << endl;//ab - cd
      |                        ^~~~
a.cc:6:37: error: 'endl' was not declared in this scope
    6 |         else if (c>=b) cout << 0 << endl;//ab - cd
      |                                     ^~~~
a.cc:7:23: error: 'cout' was not declared in this scope
    7 |         else if (a>=d)cout << 0 << endl;//cd - ab
      |                       ^~~~
a.cc:7:36: error: 'endl' was not declared in this scope
    7 |         else if (a>=d)cout << 0 << endl;//cd - ab
      |                                    ^~~~
a.cc:8:42: error: 'cout' was not declared in this scope
    8 |         else if (a<=c and c<=d and d<=b) cout << d-c << endl; //a c d b
      |                                          ^~~~
a.cc:8:57: error: 'endl' was not declared in this scope
    8 |         else if (a<=c and c<=d and d<=b) cout << d-c << endl; //a c d b
      |                                                         ^~~~
a.cc:9:42: error: 'cout' was not declared in this scope
    9 |         else if (c<=a and a<=b and b<=d) cout << b-a << endl; //c a b d
      |                                          ^~~~
a.cc:9:57: error: 'endl' was not declared in this scope
    9 |         else if (c<=a and a<=b and b<=d) cout << b-a << endl; //c a b d
      |                                                         ^~~~
Language: C++

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

int main() {
  int A,B,C,D;
  cin >> A >> B >> C >> D;
  
  if(min(B,D) - max(A,C) > 0){
   cout << min(B,D) - max(A,C)
  }
  
  if(min(B,D) - max(A,C) < 1){
   cout << 0 << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:31: error: expected ';' before '}' token
    9 |    cout << min(B,D) - max(A,C)
      |                               ^
      |                               ;
   10 |   }
      |   ~
Language: Java

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int d = sc.nextInt();
        int cul = 0;
        if(b-c > 0) {
            if(b > d) {
                cul = (b -c) - (b -d );
            } else {
                cul = b-c;
            }
        }
        System.out.println(cul);
    }
}

Compiler output:
Main.java:3: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class Main
Main.java:3: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
                         ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: C++

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

int main() {
  int A,B,C,D;
  cin >> A >> B >> C >> D;
  
  if(C >= B || A >= D) cout << 0 << endl;
  else if (C >= A && B >= D) cout << D - C << endl;
  else if (A >= C && D >= B) cout << B - A << endl;
  else if (C >= A && D >= B) cout << B = C << endl;
  else if (A >= C && B >= D) cout << D - A << endl;
  
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:44: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   11 |   else if (C >= A && D >= B) cout << B = C << endl;
      |                                          ~~^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int a,b,c,d;
  cin>>a>>b>>c>>d;
  a=max(a,c);
  b=min(b,d);
  b-=a;
  cout<<(a<0?0:a);    


Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: expected '}' at end of input
    9 |   cout<<(a<0?0:a);
      |                   ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

#include <bits/stdc++.h>
int main(){
  int a,b,c,d;
  std::cin>>a>>b>>c>>d;
  a=max(a,c);
  b=min(b,d);
  b-=a;
  std::cout<<(a<0?0:a);    


Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'max' was not declared in this scope; did you mean 'std::max'?
    5 |   a=max(a,c);
      |     ^~~
      |     std::max
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: 'std::max' declared here
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:6:5: error: 'min' was not declared in this scope; did you mean 'std::min'?
    6 |   b=min(b,d);
      |     ^~~
      |     std::min
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: 'std::min' declared here
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
a.cc:8:24: error: expected '}' at end of input
    8 |   std::cout<<(a<0?0:a);
      |                        ^
a.cc:2:11: note: to match this '{'
    2 | int main(){
      |           ^
Language: C++

#include <iostream>
int main(){
  int a,b,c,d;
  std::cin>>a>>b>>c>>d;
  a=max(a,c);
  b=min(b,d);
  b-=a;
  std::cout<<(a<0?0:a);    

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'max' was not declared in this scope; did you mean 'std::max'?
    5 |   a=max(a,c);
      |     ^~~
      |     std::max
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:303:5: note: 'std::max' declared here
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
a.cc:6:5: error: 'min' was not declared in this scope; did you mean 'std::min'?
    6 |   b=min(b,d);
      |     ^~~
      |     std::min
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: 'std::min' declared here
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
a.cc:8:24: error: expected '}' at end of input
    8 |   std::cout<<(a<0?0:a);
      |                        ^
a.cc:2:11: note: to match this '{'
    2 | int main(){
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
//min(x,y)が0以下の場合はmax(x,y)が返される
//ユークリッドの互除法を元に実装
long long gcd(long long x,long long y){
    if(x<y) swap(x,y);
    //xの方が常に大きい
    long long r;
    while(y>0){
        r=x%y;
        x=y;
        y=r;
    }
    return x;
}

//オーバフローしないようにかける順番を気を付ける
long long lcm(long long x,long long y){
    return long long(x/gcd(x,y))*y;
}
int main(){
  int N;
  cin>>N;
  long long T[N],ans=1;
  for(int i=0;i<N;i++){
    cin>>T[i];
    ans=lcm(ans,T[i]);
  }
  cout<<ans<<endl;
}


Compiler output:
a.cc: In function 'long long int lcm(long long int, long long int)':
a.cc:19:12: error: expected primary-expression before 'long'
   19 |     return long long(x/gcd(x,y))*y;
      |            ^~~~
a.cc:19:11: error: expected ';' before 'long'
   19 |     return long long(x/gcd(x,y))*y;
      |           ^~~~~
      |           ;
a.cc:19:12: error: expected primary-expression before 'long'
   19 |     return long long(x/gcd(x,y))*y;
      |            ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
    int A, B, C, D;
    cin >> A >> B >> C >> D;
    
    if (B =< C) {
        cout << 0 << endl;
    } else {
        
    int X, Y ;
    
    if (A < C) {
        X = C; 
    } else {
        X = A;
    }
    
    if (B < D) {
        Y = B;
    } else {
        Y = D;
    }
    
    cout << Y - X << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: expected primary-expression before '<' token
    8 |     if (B =< C) {
      |            ^
Language: C++

#include <iostream>
using namespace std;

int main() {
    int A, B, C, D;
    cin >> A >> B >> C >> D;
    
    if (B < C) return cout << 0 << endl;
    int X, Y ;
    
    if (A < C) {
        X = C; 
    } else {
        X = A;
    }
    
    if (B < D) {
        Y = B;
    } else {
        Y = D;
    }
    
    cout << Y - X << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:33: error: cannot convert 'std::basic_ostream<char>::__ostream_type' {aka 'std::basic_ostream<char>'} to 'int' in return
    8 |     if (B < C) return cout << 0 << endl;
      |                       ~~~~~~~~~~^~~~~~~
      |                                 |
      |                                 std::basic_ostream<char>::__ostream_type {aka std::basic_ostream<char>}
Language: C++

#include <iostream>
using namespace std;

int main() {
    int A, B, C, D;
    cin >> A >> B >> C >> D;
    
    if (B < C) cout << 0 << endl;
    int X, Y 
    if (A < C) {
        X = C; 
    } else {
        X = A;
    }
    
    if (B < D) {
        Y = B;
    } else {
        Y = D;
    }
    
    cout << Y - X << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: expected initializer before 'if'
   10 |     if (A < C) {
      |     ^~
a.cc:12:7: error: 'else' without a previous 'if'
   12 |     } else {
      |       ^~~~
a.cc:17:9: error: 'Y' was not declared in this scope
   17 |         Y = B;
      |         ^
a.cc:19:9: error: 'Y' was not declared in this scope
   19 |         Y = D;
      |         ^
a.cc:22:13: error: 'Y' was not declared in this scope
   22 |     cout << Y - X << endl;
      |             ^
Language: C++

#include <iostream>
using namespace std;

int main() {
    cin >> A >> B >> C >> D;
    
    if (B < C) cout << 0 << endl;
    cout << B - C - A << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:12: error: 'A' was not declared in this scope
    5 |     cin >> A >> B >> C >> D;
      |            ^
a.cc:5:17: error: 'B' was not declared in this scope
    5 |     cin >> A >> B >> C >> D;
      |                 ^
a.cc:5:22: error: 'C' was not declared in this scope
    5 |     cin >> A >> B >> C >> D;
      |                      ^
a.cc:5:27: error: 'D' was not declared in this scope
    5 |     cin >> A >> B >> C >> D;
      |                           ^
Language: Java

    public static void main(String[] args) {
        int pramA = Integer.parseInt(args[0]);
        int pramB = Integer.parseInt(args[1]);
        int pramC = Integer.valueOf(args[2]);
        int pramD = Integer.valueOf(args[3]);
        
        System.out.println("A = " + pramA);
        System.out.println("B = " + pramB);
        System.out.println("C = " + pramC);
        System.out.println("D = " + pramD);
        
        int ans;
        
        if (pramB < pramC || pramD < pramA) {
            ans = 0;
        } else {
            ans =Math.abs(pramB - pramC);
        }
        
        System.out.println("Anser = " + ans);
    }

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
    public static void main(String[] args) {
                  ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: Java

    public static void main(String[] args) {
        int pramA = Integer.parseInt(args[0]);
        int pramB = Integer.parseInt(args[1]);
        int pramC = Integer.valueOf(args[2]);
        int pramD = Integer.valueOf(args[3]);
        
        System.out.println("A = " + pramA);
        System.out.println("B = " + pramB);
        System.out.println("C = " + pramC);
        System.out.println("D = " + pramD);
        
        int ans;
        
        if (pramB < pramC || pramD < pramA) {
            ans = 0;
        } else {
            ans =Math.abs(pramB - pramC);
        }
        
        System.out.println("Anser = " + ans);
      	return ans;
    }

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
    public static void main(String[] args) {
                  ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: Java


import java.util.Scanner;
ublic class Main {
	public static void main(String[] args) {
	 	Scanner sc = new Scanner(System.in);
	 	int A = sc.nextInt();
	 	int B = sc.nextInt();
	 	int C = sc.nextInt();
	 	int D = sc.nextInt();
	 	int time = 0;

	 	if(Math.max(A,C) <= Math.min(B,D)) {
	 		time = Math.min(B,D) - Math.max(A,C);
	 	}

	 	System.out.println(time);
	 }
}


Compiler output:
Main.java:3: error: class, interface, enum, or record expected
ublic class Main {
^
1 error
Language: C++

#include<bits/stdc++.h>
#define PI 3.141592653589
#define ll long long
using namespace std;

int main(){
  int a, b, c, d;
  cin >> a >> b >> c >> d;

  int mx = max(a,c);
  int mn = min(b,d);

  cout << max(0. mn - mx) << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:17: error: expected ')' before 'mn'
   13 |   cout << max(0. mn - mx) << endl;
      |              ~  ^~~
      |                 )
a.cc:13:14: error: no matching function for call to 'max(double)'
   13 |   cout << max(0. mn - mx) << endl;
      |           ~~~^~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:13:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'double'
   13 |   cout << max(0. mn - mx) << endl;
      |           ~~~^~~~~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided
Language: C++

#include <iostram>
#include <algorithm>
#include <cmath>
using namespace std;


int main(){
  int a,b,c,d,result;
  cin>>a>>b>>c>>d;
  cout<<max(min(b,d)-max(a,c),0)<<endl;
}

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

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long int
#define rep(i, n) for(int i = 0; i < n; i++)
#define repp(i, n) for(int i = 1; i <= n; i++)
#define sort(v) sort((v).begin(), (v).end())
#define pb push_back
#define riverse(v) reverse((v).begin(), (v).end())
using vi = vector<int>;
using vs = vector<string>;
using vvi = vector<vi>;
using vll = vector<ll>;
const int MOD = 1e9+7;

int main() {
	int A,B,C,D;
  	cin >> A >> B >> C>> D;
  	vi time(101);
  	for(int i = A; i<=B ;i++) time[i]++;
  	for(int i = C; i<=D ;i++) time[i]++;
  	int ans = 0;
  	rep(i,101){
    	if(a[i] == 2) ans++;
    }
  	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:12: error: 'a' was not declared in this scope
   24 |         if(a[i] == 2) ans++;
      |            ^
Language: C++

#include<iostream>
using namespace std;
int main(){
  cin>>a>>b>>c>>d;
  int lower=max(a,c);
  int upper=min(b,d);
  
  cout<<max(0,upper-lower)<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:8: error: 'a' was not declared in this scope
    4 |   cin>>a>>b>>c>>d;
      |        ^
a.cc:4:11: error: 'b' was not declared in this scope
    4 |   cin>>a>>b>>c>>d;
      |           ^
a.cc:4:14: error: 'c' was not declared in this scope
    4 |   cin>>a>>b>>c>>d;
      |              ^
a.cc:4:17: error: 'd' was not declared in this scope
    4 |   cin>>a>>b>>c>>d;
      |                 ^
Language: C++

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



int main() {
    int a,b,c,d;
    cin >> a >> b >> c >>d;
    if(min(b,d)-max(a,c)>=0){
    cout << min(b,d)-max(a,c) << endl;}
    else cout << 0 << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:14:28: error: expected '}' at end of input
   14 |     else cout << 0 << endl;
      |                            ^
a.cc:9:12: note: to match this '{'
    9 | int main() {
      |            ^
Language: C++

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



int main() {
    int a,b,c,d;
    cin >> a >> b >> c >>d;
    cout << min(c,d)-max(a,b) << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:12:39: error: expected '}' at end of input
   12 |     cout << min(c,d)-max(a,b) << endl;
      |                                       ^
a.cc:9:12: note: to match this '{'
    9 | int main() {
      |            ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  int a,b,x,y;
  cin>>a>>b>>x>>y;
  int a=max(a,x);
  int b=min(b,y);
  if(b<a)cout<<0<<endl;
  else cout<<b-a<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: redeclaration of 'int a'
    7 |   int a=max(a,x);
      |       ^
a.cc:5:7: note: 'int a' previously declared here
    5 |   int a,b,x,y;
      |       ^
a.cc:8:7: error: redeclaration of 'int b'
    8 |   int b=min(b,y);
      |       ^
a.cc:5:9: note: 'int b' previously declared here
    5 |   int a,b,x,y;
      |         ^
Language: C++

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

int main() {

    int A , B , C , D ;

    cin >> A >> B >> C >> D ;

    if( B <= C || A = B || C = D ) cout << '0' << endl ;

    else if ( A <= C && B > D) cout << D - C << endl ;

    else if ( A <= C && B < D) cout << B - C << endl ;

    else if ( A > C && B > D) cout << D - A << endl ;

    else if ( A > C && B < D) cout << B - A << endl ;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:25: error: lvalue required as left operand of assignment
   10 |     if( B <= C || A = B || C = D ) cout << '0' << endl ;
      |                       ~~^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
main() {
 int A, B, C, D;
 cin A >> B >> C >> D;
  
 bool a = D <= A;
 bool b = B <= C;
 if (a || b)
   cout << 0 << endl;
 else {
   cout << min(B, D) - max(A, C) << endl;
 }
}

Compiler output:
a.cc:3:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    3 | main() {
      | ^~~~
a.cc: In function 'int main()':
a.cc:5:5: error: expected ';' before 'A'
    5 |  cin A >> B >> C >> D;
      |     ^~
      |     ;
Language: C++

import sys
A, B, C, D = map(int, sys.stdin.readline().split())
s = max(A, C)
f = min(B, D)
if f -s >= 0:
    print(f - s)
else:
    print(0)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import sys
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>

#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <regex>
#define REP(i,n) for(int i = 0; i < n; i++)
#define FOR(i,j,n) for(int i = j; i < n; i++)
#define RFOR(i,j,n) for(int i = j-1; i >= n; i--)
#define PREC(n) fixed << setprecision(n)
#define print_array(v) REP(__k, v.size()) { cout << v[__k]; if(__k != v.size()-1) cout << " "; else cout << endl; } value
#define YesorNo(a) printf(a?"Yes\n":"No\n")
#define _LIBCPP_DEBUG 0
using namespace std;
int64_t MOD = 1000000007;

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int a, b, c, d;
  cin >> a >> b >> c >> d;
  int ans;
  if (b <= c) ans = 0; //重ならない a-b/c-d
  else rif (d <= a) ans = 0; //重ならない c-d/a-b
  else if (a <= c && d <= b) ans = d - c; //a-bがc-dを覆う
  else if (c <= a && b <= d) ans = b - a; //c-dがa-bを覆う
  else if (a <= c && b <= d) ans = b - c; //a-c-b-dで重なる
  else if (c <= a && d <= b) ans = d - a; //c-a-d-bで重なる
  cout << ans << endl;
  return 0;
}
//templete by private_yusuke

Compiler output:
a.cc: In function 'int main()':
a.cc:67:8: error: 'rif' was not declared in this scope
   67 |   else rif (d <= a) ans = 0; //重ならない c-d/a-b
      |        ^~~
a.cc:68:3: error: 'else' without a previous 'if'
   68 |   else if (a <= c && d <= b) ans = d - c; //a-bがc-dを覆う
      |   ^~~~