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

#include"bits/stdc++.h"
using namespace st;
int main(){
int a[3];
cin>>a[0]>>a[1]>>a[2];
if(a[0]==1&&a[1]==1&&a[2]==0||a[0]==0&&a[1]==0&&a[2]==1){
cout<<"Open"<<endl;
}
else {
cout<<"Close"<<endl;
}
}

Compiler output:
a.cc:2:17: error: 'st' is not a namespace-name
    2 | using namespace st;
      |                 ^~
a.cc: In function 'int main()':
a.cc:5:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 | cin>>a[0]>>a[1]>>a[2];
      | ^~~
      | std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 | cout<<"Open"<<endl;
      | ^~~~
      | std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:7:15: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 | cout<<"Open"<<endl;
      |               ^~~~
      |               std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:10:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 | cout<<"Close"<<endl;
      | ^~~~
      | std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:10:16: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 | cout<<"Close"<<endl;
      |                ^~~~
      |                std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<iostream>
using namespace std;
int main(){
	int a,b,i;
	cin >> a >> b >> i;
	if(a==1&&b==1){
		cout << "open" << endl;
	}
	else if(i==1){
		cout << "open" << endl;
	}
	else{
		cout << "close" << endl;
	}
	cout<<sum<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:15: error: 'sum' was not declared in this scope
   15 |         cout<<sum<<endl;
      |               ^~~
Language: C++

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

int main() {
  bool f[3];
  for (int i = 0; i < 3; ++i)
    cin >> f[i];

  f[2] = !f[2]
  cout << (f[0] == f[1] && f[1] == f[2] ? "Open" : "Close") << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:15: error: expected ';' before 'cout'
    9 |   f[2] = !f[2]
      |               ^
      |               ;
   10 |   cout << (f[0] == f[1] && f[1] == f[2] ? "Open" : "Close") << endl;
      |   ~~~~
Language: C++

#include<iostream>
#include<string>
main(){
  std::string s;
  std::getline(cin,s);
  if(s=="1 1 0"||s=="0 0 1")std::cout << "Open\n";
  else std::cout << "Close\n";
}

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:5:16: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   std::getline(cin,s);
      |                ^~~
      |                std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
Language: C++

a[];main(){gets(a);div(puts(*a&*a>>16|a[1]%2?"Open":"Close"));}

Compiler output:
a.cc:1:1: error: 'a' does not name a type
    1 | a[];main(){gets(a);div(puts(*a&*a>>16|a[1]%2?"Open":"Close"));}
      | ^
a.cc:1:5: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    1 | a[];main(){gets(a);div(puts(*a&*a>>16|a[1]%2?"Open":"Close"));}
      |     ^~~~
a.cc: In function 'int main()':
a.cc:1:17: error: 'a' was not declared in this scope
    1 | a[];main(){gets(a);div(puts(*a&*a>>16|a[1]%2?"Open":"Close"));}
      |                 ^
a.cc:1:12: error: 'gets' was not declared in this scope
    1 | a[];main(){gets(a);div(puts(*a&*a>>16|a[1]%2?"Open":"Close"));}
      |            ^~~~
a.cc:1:24: error: 'puts' was not declared in this scope
    1 | a[];main(){gets(a);div(puts(*a&*a>>16|a[1]%2?"Open":"Close"));}
      |                        ^~~~
a.cc:1:20: error: 'div' was not declared in this scope
    1 | a[];main(){gets(a);div(puts(*a&*a>>16|a[1]%2?"Open":"Close"));}
      |                    ^~~
Language: C

#include <stdio.h>

int main(void)
{
	int n;
	int h[100];
	
	while (scanf("%d", &n) * n != 0){
		int i;
		int dif;
		
		for (i = 0; i < n; i++){
			scanf("%d", &n);
			if (i == 1){
				dif = h[1] - h[0];
			}
			else if (i > 1 && dif != h[i] - h[i - 1]){
				if (dif != h[i - 1][i - 2]){
					printf("%d\n", dif);
				}
				else {
					printf("%d\n", h[i] - h[i - 1]);
				}
				break;
			}
		}
	}
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:18:52: error: subscripted value is neither array nor pointer nor vector
   18 |                                 if (dif != h[i - 1][i - 2]){
      |                                                    ^
Language: C

#include <stdio.h>

int main(void)
{
	int n;
	int h[100];
	
	while (scanf("%d", &n) * n != 0){
		int i;
		int dif;
		
		for (i = 0; i < n; i++){
			scanf("%d", h + i);
			if (i == 1){
				dif = h[1] - h[0];
			}
			else if (i > 1 && dif != h[i] - h[i - 1]){
				if (dif != h[i - 1][i - 2]){
					printf("%d\n", dif);
				}
				else {
					printf("%d\n", h[i] - h[i - 1]);
				}
				break;
			}
		}
	}
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:18:52: error: subscripted value is neither array nor pointer nor vector
   18 |                                 if (dif != h[i - 1][i - 2]){
      |                                                    ^
Language: C

#include <stdio.h>
const int MAX_N = 105;

int N, len[MAX_N];

int isOK(int now, int d){
  int i;
  int tmp[MAX_N], tmp_i = 0;
  for(i = 0; i < N; ++i){
    if(i == now) continue;
    tmp[tmp_i] = len[i];
    ++tmp_i;
  }

  for(i = 0; i < tmp_i - 1; ++i){
    if(tmp[i + 1] - tmp[i] != d)
      return 0;
  }
  return 1;
}

int main(void) {
  int i;
  scanf("%d", &N);
  ++N;
  for(i = 0; i < N; ++i)
    scanf("%d", &len[i]);

  int ans = -1;
  for(i = 0; i < N; ++i){
    int d = (i != 0 && i != 1 ? len[1] - len[0] : len[3] - len[2]);
    if(isOK(i, d))
      ans = i;
  }
  printf("%d\n", len[ans]);
  return 0;
}

Compiler output:
main.c:4:8: error: variably modified 'len' at file scope
    4 | int N, len[MAX_N];
      |        ^~~
Language: C

#include <stdio.h>

int main(void){
	while(1){
		int n, i, count=0;
		long h[101], diff[100];
		
		scanf("%d", &n);
		if(n==0) break;
		for(i=0; i<=n; i++){
			scanf(" %ld", &h[i]);
		}
		
		for(i=0; i<n; i++){
			diff[i] = h[i+1] - h[i];
		}
		
		long start = diff[0];
		long s=0, t=0;
		
		for(i=1; i<n; i++){
			if(start == diff[i]) count++;
			else{
				if(s==0) s=i;
				else t=i;
			}
		}
		
		if(count>=2 && t!=0) printf("%ld\n", h[t]);
		else if(count>=2 && t==0) printf("%ld\n", h[s+1]);
		else if(count == 1)(printf("%ld\n", h[1]);
		else printf("%ld\n", h[0]);
			
	}


	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:31:58: error: expected ')' before ';' token
   31 |                 else if(count == 1)(printf("%ld\n", h[1]);
      |                                    ~                     ^
      |                                                          )
main.c:32:44: error: expected ';' before '}' token
   32 |                 else printf("%ld\n", h[0]);
      |                                            ^
      |                                            ;
   33 | 
   34 |         }
      |         ~
Language: C

#include<stdio.h>
int  main()
{
	int a[101], n, b, b1 = 1, c, c1 = 0, d, i, j = -1, pp;
	scanf_s("%d", &n);
	while (n != 0) {
	for (i = 0; i < n + 1; i++) {
		scanf_s("%d", &a[i]);
	}
	b = a[1] - a[0];
	for (i = 2; i < n + 1; i++) {

		if (b == a[i] - a[i - 1]) {
			b1++;
		}
		else {
			c = a[i] - a[i - 1];
			c1++;

		}
	}
	if (c1 > b1) {
		b = c;

	}
	for (i = 1; i < n; i++) {
		if (b != a[i] - a[i - 1] && b != a[i + 1] - a[i]) {
			j = i;
			break;
		}
	}
	if (j == -1) {
		if (b != a[1] - a[0]) {
			j = 0;

		}
		else {
			j = n;
		}
	}
	printf("%d\n", a[j]);
	scanf_s("%d", &n);
	c1 = 0;
	b1 = 0;
	b = 0;
	c = 0;
	j = -1;
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    5 |         scanf_s("%d", &n);
      |         ^~~~~~~
      |         scanf
Language: C

#include<stdio.h>
int  main()
{
	int  n, b, b1 = 1, c, c1 = 0, i, j = -1;
        long a[101]
	scanf("%d", &n);
	while (n != 0) {
	for (i = 0; i < n + 1; i++) {
		scanf("%ld", &a[i]);
	}
	b = a[1] - a[0];
	for (i = 2; i < n + 1; i++) {

		if (b == a[i] - a[i - 1]) {
			b1++;
		}
		else {
			c = a[i] - a[i - 1];
			c1++;

		}
	}
	if (c1 > b1){
		b = c;

	}
	for (i = 1; i < n; i++) {
		if (b != a[i] - a[i - 1] && b != a[i + 1] - a[i]) {
			j = i;
			break;
		}
	}
	if (j == -1) {
		if (b != a[1] - a[0]) {
			j = 0;

		}
		else {
			j = n;
		}
	}
	printf("%ld\n", a[j]);
	scanf("%d", &n);
	c1 = 0;
	b1 = 0;
	j = -1;
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'scanf'
    6 |         scanf("%d", &n);
      |         ^~~~~
main.c:9:31: error: 'a' undeclared (first use in this function)
    9 |                 scanf("%ld", &a[i]);
      |                               ^
main.c:9:31: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>
int main(void){
	int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
	scanf("%d",&n);
	while(n!=0){
		scanf("%d",&a[1]);
		s=a[1];
		for(i=2;i<=n+1;i++){
			scanf("%d",&a[i]);
		}
		if(a[2]-a[1]==a[3]-a[2]){
			y=a[2]-a[1];
		}
		else if(a[3]-a[2]==a[4]-a[3]){
			y=a[3]-a[2];
		}
		else{
			y=a[5]-a[4];
		}
		for(i=1;i<=n+1;i++){
			o=s+((i-1)*y);
			if(o!=a[i]){
				n=a[i];
				w=s+((3-1)*y);
				if(i==2&&w!=a[3]){
					n=a[1];
				}
				break;
			}
		}
		printf("%d\n",n);
		scanf("%d",&n);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:3:30: error: redeclaration of 'n' with no linkage
    3 |         int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
      |                              ^
main.c:3:13: note: previous declaration of 'n' with type 'int'
    3 |         int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
      |             ^
Language: C

#include <stdio.h>
int main(void){
	int n,i,a[101],y,o,s,n,w;
	scanf("%d",&n);
	while(n!=0){
		scanf("%d",&a[1]);
		s=a[1];
		for(i=2;i<=n+1;i++){
			scanf("%d",&a[i]);
		}
		if(a[2]-a[1]==a[3]-a[2]){
			y=a[2]-a[1];
		}
		else if(a[3]-a[2]==a[4]-a[3]){
			y=a[3]-a[2];
		}
		else{
			y=a[5]-a[4];
		}
		for(i=1;i<=n+1;i++){
			o=s+((i-1)*y);
			if(o!=a[i]){
				n=a[i];
				w=s+((3-1)*y);
				if(i==2&&w!=a[3]){
					n=a[1];
				}
				break;
			}
		}
		printf("%d\n",n);
		scanf("%d",&n);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:3:30: error: redeclaration of 'n' with no linkage
    3 |         int n,i,a[101],y,o,s,n,w;
      |                              ^
main.c:3:13: note: previous declaration of 'n' with type 'int'
    3 |         int n,i,a[101],y,o,s,n,w;
      |             ^
Language: C

#include<stdio.h>
int main(void)
{
    int n,h[101];
    int i,j,l;
    int s[101],b[101];
    int f;
      
    scanf("%d",&n);
    while(n!=0){
        for(i=0;i<n+1;i++){
            scanf("%d",&h[i]);
        }
        for(i=0;i<n+1;i++){
            k=0;
            for(j=0;j<n+1;j++){
                if(i!=j){
                    b[l]=h[j];
                    k++;
                }
            }
            for(j=0;j<n-1;j++){
                s[j]=b[j+1]-b[j];
            }
            f=0;
            for(j=0;j<n-2;j++){
                if(s[j]!=s[j+1]){
                    f=1;
                }
            }
            if(f==0){
                printf("%d\n",h[i]);
                break;
            }
        }   
        scanf("%d",&n);
    }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:15:13: error: 'k' undeclared (first use in this function)
   15 |             k=0;
      |             ^
main.c:15:13: note: each undeclared identifier is reported only once for each function it appears in
Language: C

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

bool isValid(const vector<int> &v) {
  int d = v[1] - v[0];
  for(int i = 1; i+1 < v.size(); ++i) {
    if(v[i+1] - v[i] != d) return false;
  }
  return true;
}

int main() {
  int n;
  while(cin >> n && n) {
    int h[n+1];
    for(int i = 0; i < n+1; ++i) cin >> h[i];
    for(int k = 0; k < n+1; ++k) {
      vector<int> v;
      for(int i = 0; i < n+1; ++i) {
        if(i == k) continue;
        v.push_back(h[i]);
      }
      if(isValid(v)) {
        cout << h[k] << endl;
        break;
      }
    }
  }
  return 0;
}

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

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

#define N 100

static int d[ N + 1 ];
static int n;

int
judge (
  int *d,
  )
{
  int i;

  for ( i = 2; i < n; ++i )
  {
    if ( d[ i - 1 ] - d[ i - 2 ] != d[ i ] - d[ i - 1 ] )
      break ;
  }

  return ( i == n );
}

int
main (
  int   argc,
  char *argv[ ]
  )
{
  int i, j;

  for ( ; ; )
  {
    scanf ( "%d", &n );
    if ( n == 0 ) break ;
    for ( i = 0; i <= n; ++i )
      scanf ( "%d", &d[ i ] );
    
    for ( i = 0; i <= n; ++i )
    {
      int t[ N ];
      int sp = 0;

      for ( j = 0; j <= n; ++j )
      {
        if ( j == 0 ) continue ;

        t[ sp++ ] = d[ j ];
      }

      if ( judge ( t ) )
      {
        printf ( "%d\n", d[ i ] );
        break ;
      }
    }
  }

  return ( EXIT_SUCCESS );
}

Compiler output:
main.c:12:3: error: expected declaration specifiers or '...' before ')' token
   12 |   )
      |   ^
main.c: In function 'main':
main.c:52:12: error: implicit declaration of function 'judge' [-Wimplicit-function-declaration]
   52 |       if ( judge ( t ) )
      |            ^~~~~
Language: C

#include <stdio.h>

int main(void)
{
	int n = 0, temp = 0;
	int h[] = {0};
	int a = 0;

	scanf("%d", &n);

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

	for (int i = 0; i < n; i++) {
		scanf("%d", &temp);

		h[i] = temp;
	}

	while (a < i){
		if ( (h[a+1] - h[a]) * 2 == (h[a+2] - h[a]) ) {
			a++;
		} else {
			printf("%d\n", h[a]);

			break;
		}
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:21:20: error: 'i' undeclared (first use in this function)
   21 |         while (a < i){
      |                    ^
main.c:21:20: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int main(void)
{
	int n = 0, temp = 0;
	int a = 0;

	scanf("%d", &n);

	int h[n+1] = {0};

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

	for (int i = 0; i < n; i++) {
		scanf("%d", &temp);

		h[i] = temp;
	}

	while (a < i){
		if ( (h[a+1] - h[a]) * 2 == (h[a+2] - h[a]) ) {
			a++;
		} else {
			printf("%d\n", h[a]);

			break;
		}
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:22: error: variable-sized object may not be initialized except with an empty initializer
   10 |         int h[n+1] = {0};
      |                      ^
main.c:22:20: error: 'i' undeclared (first use in this function)
   22 |         while (a < i){
      |                    ^
main.c:22:20: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <algorithm>
#include <functional>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <bitset>
#include <climits>

#define all(c) (c).begin(), (c).end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define pb(e) push_back(e)
#define mp(a, b) make_pair(a, b)
#define fr first
#define sc second

const int INF=100000000;
int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};
using namespace std;
typedef pair<int ,int > P;
typedef long long ll;

int n;
int h[102];

bool ok(int a) {
    rep(i,n+1) {
        if(i==a) continue;
        int p = i -1;
        if(i==a+1) p = i - 2;
        if(p<0) continue;
        // printf("%d : %d %d,%d %d\n", i, h[0], h[1], h[p],h[i]);
        if(h[0]-h[1] != h[p]-h[i]) return false;

    }

    return true;
}

void solve() {
    rep(i,n+1) cin>>h[i];

    rep(i,n+1) {
        if(ok(i)) {
            cout<<h[i]<<endl;
            return;
        }
    }

    cout<<a[0]<<endl;

}

int main() {
    while(cin>>n) {
        if(n==0) break;
        solve();
    }

    return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:61:11: error: 'a' was not declared in this scope
   61 |     cout<<a[0]<<endl;
      |           ^
Language: C++

#include<stdio.h>
#include<iostream>
#include<string>
#include<math.h>
#include<algorithm>
using namespace std;
int main(){

	
	int N;
	while(1){
long long int x0=0,x1=0,x2=0,x3=0,d1=0,d2=0,d3=0;
	long long int K=0,y,x=0,d=0;

	cin>>N;if(N==0)break;
	cin>>x0>>x1>>x2>>x3;
	bool f=false;
	d1=x1-x0;d2=x2-x1;d3=x3-x2;
	//cout<<d1<<" "<<d2<<" "<<d3<<endl;
	if(d2==d3&&d1!=d2){K=x0;f=true;}
	if(x2-x0==d3){K=x1;f=true;}
	if(d1==x3-x1){K=x2;f=true;}
	if(d1==d2&&d1!=d3){K=x3;f=true;}
	if(f!=true){
		d=d1;x=x3;}
	for(int i=4;i<=N;i++)
	{
		cin>>y;
		if(y-x!=d&&f==false){K=y;f==true}
		else x=y;
	}
	//}
	cout<<K<<endl;
	}
}
	

Compiler output:
a.cc: In function 'int main()':
a.cc:29:49: error: expected ';' before '}' token
   29 |                 if(y-x!=d&&f==false){K=y;f==true}
      |                                                 ^
      |                                                 ;
Language: C++

#include<iostream>
using namespace std;
int main(){
	while(1){
		int n=0;
		int h[10000000001];
		int HI[10000000001];
		int A=0;
		int B=0;
		int F=0;
		cin>>n;
		if(n==0){
			break;
		}
		for(int i=0;i<n+1;i++){
			cin>>h[i];
			HI[i]=0;
		}
		A=h[0]-h[1];
		for(int i=1;i<n;i++){
			B=h[i]-h[i+1];
			if(A!=B){
				F++;
			}
			if((i==2)&&(F==2)){
				cout<<h[0]<<endl;
				break;
			}
			else if(F==2){
				cout<<h[i]<<endl;
				break;
			}
			else if((i<=n-1)&&(F==1)){
				cout<<h[n]<<endl;
				break;
			}
		}
	}
		
				
	return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:41:18: error: expected '}' at end of input
   41 |         return 0;
      |                  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

#include<iostream>
using namespace std;

int main(){
	while(1){
		int h[101];
		int n=0;
		int d=0;
		int F=0;
		cin>>n;
		if(n==0){
			break;
		}
		for(int i=0;i<n+1;i++){
			cin>>h[i];
		}
		for(int i=0;i<n+1;i++){
			int tmp[100];
			for(int j=0;j<i;j++){
				tmp[j]=h[j];
			}
			for(int j=0;j<i;j++){
				tmp[j-1]=h[j];
			}
			d=tmp[1]-tmp[0];
			for(int a=1;a<n-1;a++){
				if(tmp[a+1]-tmp[a]!=d){
					F=1;
					break;
				}
			}
			if(F==1){
				cout<<h[a]<<endl;
				break;
			}
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:41: error: 'a' was not declared in this scope
   33 |                                 cout<<h[a]<<endl;
      |                                         ^
Language: C++

#include<iostream>
using namespace std;

int main(){
	while(1){
		int h[101];
		int n=0;
		int d=0;
		int F=0;
		cin>>n;
		if(n==0){
			break;
		}
		for(int i=0;i<n+1;i++){
			cin>>h[i];
		}
		for(int i=0;i<n+1;i++){
			int tmp[100];
			for(int j=0;j<i;j++){
				tmp[j]=h[j];
			}
			for(int j=0;j<n+1;j++){
				tmp[j-1]=h[j];
			}
			d=tmp[1]-tmp[0];
			for(int a=1;a<n-1;a++){
				if(tmp[a+1]-tmp[a]!=d){
					F=1;
					break;
				}
			}
			if(F==1){
				cout<<h[a]<<endl;
				break;
			}
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:41: error: 'a' was not declared in this scope
   33 |                                 cout<<h[a]<<endl;
      |                                         ^
Language: C++

#include<iostream>
using namespace std;

int main(){
	while(1){
		int h[101];
		int n=0;
		int d=0;
		int F=0;
		cin>>n;
		if(n==0){
			break;
		}
		for(int i=0;i<n+1;i++){
			cin>>h[i];
		}
		for(int i=0;i<n+1;i++){
			int tmp[100];
			for(int j=0;j<i;j++){
				tmp[j]=h[j];
			}
			for(int j=i+1;j<n+1;j++){
				tmp[j-1]=h[j];
			}
			d=tmp[1]-tmp[0];
			for(int a=1;a<n-1;a++){
				if(tmp[a+1]-tmp[a]!=d){
					F=1;
					break;
				}
			}
			if(F==1){
				cout<<h[a]<<endl;
				break;
			}
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:41: error: 'a' was not declared in this scope
   33 |                                 cout<<h[a]<<endl;
      |                                         ^
Language: C++

#include<iostream>
using namespace std;

int main(){
	while(1){
		int h[101];
		int n=0;
		int d=0;
		int F=1;
		cin>>n;
		if(n==0){
			break;
		}
		for(int i=0;i<n+1;i++){
			cin>>h[i];
		}
		for(int i=0;i<n+1;i++){
			int tmp[100];
			for(int j=0;j<i;j++){
				tmp[j]=h[j];
			}
			for(int j=i+1;j<n+1;j++){
				tmp[j-1]=h[j];
			}
			d=tmp[1]-tmp[0];
			for(int a=1;a<n-1;a++){
				if(tmp[a+1]-tmp[a]!=d){
					F=0;
					break;
				}
			}
			if(F==0){
				cout<<h[a]<<endl;
				break;
			}
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:41: error: 'a' was not declared in this scope
   33 |                                 cout<<h[a]<<endl;
      |                                         ^
Language: C++

#include <cstdio>
#include <iostream>
#include <stdlib.h>
#include <iomanip>
#include <string> 
#include <sstream>  
#include <vector> 
#include <windows.h>
using namespace std;

int main(){
    int n;
    while(cin >> n){
    if(n == 0){break;}
    int nae[n  + 1],m  = 0,ans  = 0,c = 0,mm;
    for(int i = 0;n >= i;i++){
        cin >> nae[i];
        if(i != 0){
            if(nae[i] <= nae[i - 1]){ans = nae[i - 1];m = 0;}
            if(m == 0){m = nae[i] - nae[i - 1];}
            mm = nae[i] - nae[i - 1];
            //cout << m << " " << mm << endl;
            if(m != nae[i] - nae[i - 1]){
                ans = nae[i];c++;
                for(int ii = i;n > ii;ii++){
                    nae[i] = nae[i + 1];
                }
                
                n--;i--;
            }
            //cout << "AA" << ans << endl;
        }
    }
    if(c > 1){ans = nae[0];}
    cout << ans << endl;
    }




}  

Compiler output:
a.cc:8:10: fatal error: windows.h: No such file or directory
    8 | #include <windows.h>
      |          ^~~~~~~~~~~
compilation terminated.
Language: C++

int main(){
	int n;
	cin >> n;
	int nae[n + 1];
	for(int i = 0;n >= i;i++){
		cin >> nae[i];
	}
	int ans = 0;
	for(int i = 0;n >= i;i++){
		int c = 0;m = 0;
		for(int ii = i + 1;n > ii;ii++){
			if(m = 0){m = nae[ii + 1] - nae[ii];}
			if(m != nae[ii + 1] - nae[ii]){c = 1;break;}
		}
		if(c != 0){
			ans = nae[i];break;
		}

	}	
	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:9: error: 'cin' was not declared in this scope
    3 |         cin >> n;
      |         ^~~
a.cc:10:27: error: 'm' was not declared in this scope
   10 |                 int c = 0;m = 0;
      |                           ^
a.cc:20:9: error: 'cout' was not declared in this scope
   20 |         cout << ans << endl;
      |         ^~~~
a.cc:20:24: error: 'endl' was not declared in this scope
   20 |         cout << ans << endl;
      |                        ^~~~
Language: C++

#include <cstdio>
#include <iostream>
#include <iomanip>
#include <string>   
using namespace std;

int main(){
	while(cin >> n){
		int n,m,ans;
		cin >> n;
		int nae[n + 1];
		for(int i = 0;n >= i;i++){
			cin >> nae[i];
		}
		int ans = 0;
		for(int i = 0;n >= i;i++){
			int c = 0;m = 0;
			for(int ii = i + 1;n > ii;ii++){
				if(m = 0){m = nae[ii + 1] - nae[ii];}
				if(m != nae[ii + 1] - nae[ii]){c = 1;break;}
			}
			if(c != 0){
				ans = nae[i];break;
			}

		}	
		cout << ans << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:22: error: 'n' was not declared in this scope
    8 |         while(cin >> n){
      |                      ^
a.cc:13:32: error: 'nae' was not declared in this scope
   13 |                         cin >> nae[i];
      |                                ^~~
a.cc:15:21: error: redeclaration of 'int ans'
   15 |                 int ans = 0;
      |                     ^~~
a.cc:9:25: note: 'int ans' previously declared here
    9 |                 int n,m,ans;
      |                         ^~~
a.cc:19:47: error: 'nae' was not declared in this scope
   19 |                                 if(m = 0){m = nae[ii + 1] - nae[ii];}
      |                                               ^~~
a.cc:20:41: error: 'nae' was not declared in this scope
   20 |                                 if(m != nae[ii + 1] - nae[ii]){c = 1;break;}
      |                                         ^~~
a.cc:23:39: error: 'nae' was not declared in this scope
   23 |                                 ans = nae[i];break;
      |                                       ^~~
Language: C++

#include <cstdio>
#include <iostream>
#include <iomanip>
#include <string>   
using namespace std;

int main(){
	while(cin >> n){
		int n;
		cin >> n;
		int nae[n + 1];
		for(int i = 0;n >= i;i++){
			cin >> nae[i];
		}
		int ans = 0;
		for(int i = 0;n >= i;i++){
			int c = 0;m = 0;
			for(int ii = i + 1;n > ii;ii++){
				if(m = 0){m = nae[ii + 1] - nae[ii];}
				if(m != nae[ii + 1] - nae[ii]){c = 1;break;}
			}
			if(c != 0){
				ans = nae[i];break;
			}

		}	
		cout << ans << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:22: error: 'n' was not declared in this scope
    8 |         while(cin >> n){
      |                      ^
a.cc:13:32: error: 'nae' was not declared in this scope
   13 |                         cin >> nae[i];
      |                                ^~~
a.cc:17:35: error: 'm' was not declared in this scope
   17 |                         int c = 0;m = 0;
      |                                   ^
a.cc:19:47: error: 'nae' was not declared in this scope
   19 |                                 if(m = 0){m = nae[ii + 1] - nae[ii];}
      |                                               ^~~
a.cc:20:41: error: 'nae' was not declared in this scope
   20 |                                 if(m != nae[ii + 1] - nae[ii]){c = 1;break;}
      |                                         ^~~
a.cc:23:39: error: 'nae' was not declared in this scope
   23 |                                 ans = nae[i];break;
      |                                       ^~~
Language: C++

#include <cstdio>
#include <iostream>
#include <iomanip>
#include <string>   
using namespace std;

int main(){
	int n;
	while(cin >> n){
		cin >> n;
		int nae[n + 1];
		for(int i = 0;n >= i;i++){
			cin >> nae[i];
		}
		int ans = 0;
		for(int i = 0;n >= i;i++){
			int c = 0;m = 0;
			for(int ii = i + 1;n > ii;ii++){
				if(m = 0){m = nae[ii + 1] - nae[ii];}
				if(m != nae[ii + 1] - nae[ii]){c = 1;break;}
			}
			if(c != 0){
				ans = nae[i];break;
			}

		}	
		cout << ans << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:35: error: 'm' was not declared in this scope
   17 |                         int c = 0;m = 0;
      |                                   ^
Language: C++

#include <stdio.h>
int main(void) {
    int n,i,j,k;
    int h[102];
    int tmp[102];
    int sa[102]
    while(1){
        scanf("%d",&n);
        if(n==0) break;
	for(i=0;i<=100;i++) sa[i];
        for(i=0;i<=n;i++) scanf("%d",&h[i]);
        for(i=0;i<=n;i++){
            for(j=0;j<=100;j++) tmp[j]=0;
            for(j=0;j<=n;j++){
                if(i!=j){
                    tmp[j]=h[j];
                }
            }
/*          for(j=0;j<=n;j++) printf("%d ",tmp[j]);
            printf("\n");*/
            int k=0;
			for(i=0;i<=100;i++) sa[i]=0;
            for(j=0;j<=n;j++){
                if(tmp[j]!=0){
                    sa[k]=tmp[j];
                    k++;
                }
            }
 /*         for(j=0;j<n;j++) printf("%d ",sa[j]);
            printf("\n");
   */       int ans=0,flg=0;
            for(j=0;j<n-1;j++){
                if(j==0){
                    ans=sa[j]-sa[j+1];
                }
                else if(ans!=sa[j]-sa[j+1]){
                    flg=1;
                    break;
                }
            }
            if(flg==0){
                printf("%d\n",h[i]);
            }
    //      printf("  %d\n",flg);
        }
   //   printf("\n");
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: expected initializer before 'while'
    7 |     while(1){
      |     ^~~~~
Language: C++

#include<stdio.h>
int  main()
{
	int a[101], n, b, b1 = 1, c, c1 = 0, d, i, j = -1, pp;
	scanf_s("%d", &n);
	while (n != 0) {
	for (i = 0; i < n + 1; i++) {
		scanf_s("%d", &a[i]);
	}
	b = a[1] - a[0];
	for (i = 2; i < n + 1; i++) {

		if (b == a[i] - a[i - 1]) {
			b1++;
		}
		else {
			c = a[i] - a[i - 1];
			c1++;

		}
	}
	if (c1 > b1) {
		b = c;

	}
	for (i = 1; i < n; i++) {
		if (b != a[i] - a[i - 1] && b != a[i + 1] - a[i]) {
			j = i;
			break;
		}
	}
	if (j == -1) {
		if (b != a[1] - a[0]) {
			j = 0;

		}
		else {
			j = n;
		}
	}
	printf("%d\n", a[j]);
	scanf_s("%d", &n);
	c1 = 0;
	b1 = 0;
	j = -1;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    5 |         scanf_s("%d", &n);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <stdio.h>
int main(void){
	int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
	scanf("%d",&n);
	scanf("%d",&a[1]);
	s=a[1];
	for(i=2;i<=n+1;i++){
		scanf("%d",&a[i]);
	}
	if(a[2]-a[1]==a[3]-a[2]){
		y=a[2]-a[1];
	}
	else if(a[3]-a[2]==a[4]-a[3]){
		y=a[3]-a[2];
	}
	else{
		y=a[5]-a[4];
	}
	for(i=1;i<=n+1;i++){
		o=s+((i-1)*y);
		if(o!=a[i]){
			n=a[i];
			w=s+((3-1)*y);
			if(i==2&&w!=a[3]){
				n=a[1];
			}
			break;
		}
	}
	printf("%d\n",n);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:30: error: redeclaration of 'int n'
    3 |         int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
      |                              ^
a.cc:3:13: note: 'int n' previously declared here
    3 |         int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
      |             ^
Language: C++

#include <stdio.h>
int main(void){
	int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
	scanf("%d",&n);
	while(n!=0){
		scanf("%d",&a[1]);
		s=a[1];
		for(i=2;i<=n+1;i++){
			scanf("%d",&a[i]);
		}
		if(a[2]-a[1]==a[3]-a[2]){
			y=a[2]-a[1];
		}
		else if(a[3]-a[2]==a[4]-a[3]){
			y=a[3]-a[2];
		}
		else{
			y=a[5]-a[4];
		}
		for(i=1;i<=n+1;i++){
			o=s+((i-1)*y);
			if(o!=a[i]){
				n=a[i];
				w=s+((3-1)*y);
				if(i==2&&w!=a[3]){
					n=a[1];
				}
				break;
			}
		}
		printf("%d\n",n);
		scanf("%d",&n);
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:30: error: redeclaration of 'int n'
    3 |         int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
      |                              ^
a.cc:3:13: note: 'int n' previously declared here
    3 |         int n,i,a[101],y,o,s,n,w;   //s:??????,y:??¬???,n:???
      |             ^
Language: C++

#include<iostream>
#include<vector>
using namespace std;
static const int N = 100;
bool isSequence(vector<int> v){
int d = v[1] - v[0];
for ( int i = 1; i < v.size(); i++ ){
if ( v[i] - v[i-1] != d ) return false;
}
return true;

}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include"bits/stdc++.h"
#define rep(i,n) for(int i=0;i<n;i++)
typedef long long ll;
using namespace std;
??
int a[101];
int main(){
	int n;
	scanf("%d", &n);
	for (int i = 0; i <= n; i++){
		scanf("%d", &a[i]);
	}
	bool flag = true;
	int s = -1;
	int i;
	for (i = 0; i <= n; i++){
		for (int j = 0; j < n; j++){
			if (j == i)continue;
			int t = 1;
			while (j + t == i&&j + t < n)
				t++;
			if (j + t == i)continue;
			if (s == -1 || a[j + t] - a[j] == s){
				s = a[j + t] - a[j];
			}
			else flag = false;
		}
		if (flag)break;
		flag = true;
		s = -1;
	}
	printf("%d\n", a[i]);
	return 0;
}

Compiler output:
a.cc:5:1: error: expected unqualified-id before '?' token
    5 | ??
      | ^
a.cc: In function 'int main()':
a.cc:11:30: error: 'a' was not declared in this scope
   11 |                 scanf("%d", &a[i]);
      |                              ^
a.cc:23:40: error: 'a' was not declared in this scope
   23 |                         if (s == -1 || a[j + t] - a[j] == s){
      |                                        ^
a.cc:32:24: error: 'a' was not declared in this scope
   32 |         printf("%d\n", a[i]);
      |                        ^
Language: C++

//============================================================================
// Name        : AOJ.cpp
// Author      :
// Version     :
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <iostream>
#include <cstdio>
#include <string>
#include <cctype>
using namespace std;

int main() {
	int n,h,R=0;
	int d;
	cin>>n;
	while(1){
		if (n==0)break;
		for(int i=0;i<n+1;i++){
			cin>>h;
		}
		for(int i=0;i<n+1;i++){
			d=h[1]-h[0];
			if (h[i+1]-h[i]!=d)d=h[i+1]-h[1];
		}
		cout<<R<<endl;
	}




	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:28: error: invalid types 'int[int]' for array subscript
   25 |                         d=h[1]-h[0];
      |                            ^
a.cc:25:33: error: invalid types 'int[int]' for array subscript
   25 |                         d=h[1]-h[0];
      |                                 ^
a.cc:26:30: error: invalid types 'int[int]' for array subscript
   26 |                         if (h[i+1]-h[i]!=d)d=h[i+1]-h[1];
      |                              ^
a.cc:26:37: error: invalid types 'int[int]' for array subscript
   26 |                         if (h[i+1]-h[i]!=d)d=h[i+1]-h[1];
      |                                     ^
a.cc:26:47: error: invalid types 'int[int]' for array subscript
   26 |                         if (h[i+1]-h[i]!=d)d=h[i+1]-h[1];
      |                                               ^
a.cc:26:54: error: invalid types 'int[int]' for array subscript
   26 |                         if (h[i+1]-h[i]!=d)d=h[i+1]-h[1];
      |                                                      ^
Language: C++

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <vector>
#include <queue>

using namespace std;

#define FOR(i,a,b) for (ll i = (a); i < (b); i++)
#define REP(i,n) FOR(i,0,n)

typedef long long ll;

ll h[101];

int main(){
	int n;
	
	while (cin >> n, n){
		ll d1, d2, d3, d4, d5, d6, d7, d;
		
		REP(i,n+1){
			scanf("%lld", &h[i]);
		}
		
		d1 = h[1] - h[0];
		d2 = h[2] - h[1];
		d3 = h[2] - h[0];
		d4 = h[3] - h[2];
		d5 = h[3] - h[1];
		d6 = h[4] - h[3];
		d7 = h[4] - h[2];
		
		ll ans = 0;
		int f = 0;
		
		if (d1 == d2 && d1 == d4){
			f = 1;
			d = d1;
		}
		else if (d2 == d4 && d2 == d6){
			ans = h[0];
		}
		else if (d3 == d4 && d3 == d7){
			ans = h[1];
		}
		else if (d1 == d5 && ){
			ans = h[2];
		}
		else if (d1 == d2){
			f = 1;
			d = d1;
		}
		
		if (f){
			int c = h[0];
			
			REP(i,n+1){
				if (c != h[i]){
					ans = h[i];
					break;
				}
				
				c += d;
			}
		}
		
		cout << ans << endl;
	}
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:38: error: expected primary-expression before ')' token
   50 |                 else if (d1 == d5 && ){
      |                                      ^
Language: C++

#include<stdio.h>
int main(void)
{
    int x,y,z,a[500],i,n,j;
	scanf("%d",&j);
	while(j!=0){
	    z=0;
		y=0;
		x=0;
		for(i=0;i<j+1;i++){
			scanf("%d",&a[i]);
		}
		for(i=0;i<j;i++){
				n=i+1;
				z=a[n]-a[i];
				if(x!=0){
					if(x!=y && y==z){
						i=i-2;
						break;
					}
					if(y==x && y!=z){
						i=n;
						break;
					}
				}
				x=y;
				y=z;
			
		}
		printf("%d\n",a[i]);
		scanf("%d",&j);
	}
	return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:33:18: error: expected '}' at end of input
   33 |         return 0;
      |                  ^
a.cc:3:1: note: to match this '{'
    3 | {
      | ^
Language: C++

include <iostream>
using namespace std;
 
int main(){
    long int n,leaf[100],mem,mem2,a,same;
    while(1){
        cin >> n;
        if(n == 0) break;
        a=0;
        for(int i=0;i<n+1;i++) cin >> leaf[i];
        for(int i=0;i<n-1;i++){
            mem = leaf[i+1] - leaf[i];
            mem2 = leaf[i+2] - leaf[i+1];
            if(mem2 != mem) a = i;
            else same = mem;
            if(i == n-2 && (leaf[i+2] - leaf[i+1] != same)){
                if(leaf[i+2] - same != leaf[i+1]) a = i+2;
                if(leaf[i+1] - same != leaf[i]) a = i+1;
            }
        }
        cout << leaf[a] << endl;
    }
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <iostream>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:7:9: error: 'cin' was not declared in this scope
    7 |         cin >> n;
      |         ^~~
a.cc:21:9: error: 'cout' was not declared in this scope
   21 |         cout << leaf[a] << endl;
      |         ^~~~
a.cc:21:28: error: 'endl' was not declared in this scope
   21 |         cout << leaf[a] << endl;
      |                            ^~~~
Language: C++

int main(void)
{
	//入力変数
	int n = 0;
	//入力配列
	int h_input[101] = {0};
	//一時入力変数
	int h_hozon[101] = {0};
	
	while (true)
	{
		cin >> n;

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

		//入力する
		for (int i = 0; i <= n; i++)
		{
			cin >> h_input[i];
		}
		
		for (int i = 0; i <= n; i++)
		{
			int count = 0;
			for (int j = 0; j <= n; j++)
			{
				if (i != j)
				{
					h_hozon[count++] = h_input[j];
				}
			}

			//forを回して調べる
			int sa = h_hozon[1] - h_hozon[0];

			int k = 0;
			for (k = 0; k < n - 1; k++)
			{
				if (h_hozon[k] + sa != h_hozon[k + 1])
				{
					break;
				}
			}
			if (k == n - 1)
			{
				cout << h_input[i] << endl;
				break;
			}
		}
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:17: error: 'cin' was not declared in this scope
   12 |                 cin >> n;
      |                 ^~~
a.cc:46:33: error: 'cout' was not declared in this scope; did you mean 'count'?
   46 |                                 cout << h_input[i] << endl;
      |                                 ^~~~
      |                                 count
a.cc:46:55: error: 'endl' was not declared in this scope
   46 |                                 cout << h_input[i] << endl;
      |                                                       ^~~~
Language: Java

import java.util.Collections;
import java.util.Scanner;
import java.util.Arrays;
public class main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int L=0,S=0,j=0,cnt=0,ksan,ksan2;
		Integer[] le = new Integer[4];
		Integer[] se = new Integer[4];
		ksan = sc.nextInt();
		if(ksan==1111||ksan==2222||ksan==3333||ksan==4444||ksan==5555||ksan==6666||ksan==7777||ksan==8888||ksan==9999){
			System.out.println("NA");
			ksan = sc.nextInt();
		}else if(ksan == 6174){
			System.out.println(0);
			ksan = sc.nextInt();
		}
		while(ksan != 0000){
			if(ksan == 6174){
				System.out.println(cnt);
				ksan = sc.nextInt();
			}else if(ksan==1111||ksan==2222||ksan==3333||ksan==4444||ksan==5555||ksan==6666||ksan==7777||ksan==8888||ksan==9999){
				System.out.println("NA");
				ksan = sc.nextInt();
			}else{
				ksan2 = ksan;
				for(int a=1000;a>=1;a = a/10){
					ksan2 = ksan/a;
					le[j] = ksan2;
					se[j] = ksan2;
					ksan = ksan - le[j]*a;
					j++;
				}
				Arrays.sort(le,Collections.reverseOrder());
				Arrays.sort(se);
				int bai = 1000;
				for(int b=1;b<=4;b++){
					L = L + le[b-1] * bai;
					S = S + se[b-1] * bai;
					bai = bai/10;
				}
			ksan = L-S;
			L = 0;
			S = 0;
			j=0;
			cnt++;
			}
		}
	}
}

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

import java.util.Collections;
import java.util.Scanner;
import java.util.Arrays;
public class MAIN {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int L=0,S=0,j=0,cnt=0,ksan,ksan2;
		Integer[] le = new Integer[4];
		Integer[] se = new Integer[4];
		ksan = sc.nextInt();
		if(ksan==1111||ksan==2222||ksan==3333||ksan==4444||ksan==5555||ksan==6666||ksan==7777||ksan==8888||ksan==9999){
			System.out.println("NA");
			ksan = sc.nextInt();
		}else if(ksan == 6174){
			System.out.println(0);
			ksan = sc.nextInt();
		}
		while(ksan != 0000){
			if(ksan == 6174){
				System.out.println(cnt);
				ksan = sc.nextInt();
			}else if(ksan==1111||ksan==2222||ksan==3333||ksan==4444||ksan==5555||ksan==6666||ksan==7777||ksan==8888||ksan==9999){
				System.out.println("NA");
				ksan = sc.nextInt();
			}else{
				ksan2 = ksan;
				for(int a=1000;a>=1;a = a/10){
					ksan2 = ksan/a;
					le[j] = ksan2;
					se[j] = ksan2;
					ksan = ksan - le[j]*a;
					j++;
				}
				Arrays.sort(le,Collections.reverseOrder());
				Arrays.sort(se);
				int bai = 1000;
				for(int b=1;b<=4;b++){
					L = L + le[b-1] * bai;
					S = S + se[b-1] * bai;
					bai = bai/10;
				}
			ksan = L-S;
			L = 0;
			S = 0;
			j=0;
			cnt++;
			}
		}
	}
}

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

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

#define swap(a, b, type) {type tmp = a; a = b; b = tmp;}

int main(void)
{
	char str[8];
	
	while (scanf("%s", str) * str[0] != 0){
		int count = 0;
		
		while (strcmp(str, "6174") != 0){
			int i, j;
			char l[8], s[8];
			
			strcpy(l, str);
			strcpy(s, str);
			for (i = 0; i < 3; i++){
				for (j = 0; j < 3 - i; j++){
					if (l[j] < l[j + 1]){
						swap(l[j], l[j + 1]);
					}
					if (s[j] > s[j + 1]){
						swap(s[j], s[j + 1]);
					}
				}
			}
			for (i = 0; i < 4; i++){
				str[i] = l[i] - s[i] + '0';
			}
		}
		
		printf("%d\n", count);
	}
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:22:68: error: macro "swap" requires 3 arguments, but only 2 given
   22 |                                                 swap(l[j], l[j + 1]);
      |                                                                    ^
main.c:4:9: note: macro "swap" defined here
    4 | #define swap(a, b, type) {type tmp = a; a = b; b = tmp;}
      |         ^~~~
main.c:22:49: error: 'swap' undeclared (first use in this function)
   22 |                                                 swap(l[j], l[j + 1]);
      |                                                 ^~~~
main.c:22:49: note: each undeclared identifier is reported only once for each function it appears in
main.c:25:68: error: macro "swap" requires 3 arguments, but only 2 given
   25 |                                                 swap(s[j], s[j + 1]);
      |                                                                    ^
main.c:4:9: note: macro "swap" defined here
    4 | #define swap(a, b, type) {type tmp = a; a = b; b = tmp;}
      |         ^~~~
Language: C

#include <cstdio>
#include <algorithm>

using namespace std;

int main()
{
	int N[4], L[4], S[4], l, s, i, num;
	char input[5];
	
	while (1){
		scanf("%s", input);
		
		for (i = 0; i < 4; i++){
			N[i] = input[i] - '0';
		}
		
		if (input[0] == '0' && input[1] == '0' && input[2] == '0' && input[3] == '0'){
			break;
		}
		
		if (input[0] == input[1] && input[0] == input[2] && input[0] == input[3]){
			printf("NA\n");
			continue;
		}
		
		num = 0;
		while (1){
			if (N[0] == 6 && N[1] == 1 && N[2] == 7 && N[3] == 4){
				break;
			}
			
			for (i = 0; i < 4; i++){
				L[i] = N[i];
				S[i] = N[i];
			}
			
			sort(L, L + 4);
			reverse(L, L + 4);
			sort(S, S + 4);

			for (i = 3; i >= 0; i--){
				N[i] = L[i] - S[i];
				if (N[i] < 0){
					N[i] += 10;
					L[i - 1]--;
				}
			}
			
			num++;
		}
		
		printf("%d\n", num);
	}
	
	return (0);
}

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

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

void sort(char *n, int type);
void swap(char *a, char *b);

int main(void)
{
	char num[5];
	int L, S;
	int count;
	
	while (1){
		scanf("%s", num);
		
		if (num[0] == num[1] && num[1] == num[2] && num[2] == num[3]) {
			puts("NA");
			break;
		}
		
		count = 0;
		while (!(num[0] == '6' && num[1] == '1' && num[2] == '7' && num[3] == '4')){
			sort(num, 1);
			L = atoi(num);
			
			sort(num, 0);
			S = atoi(num);
			
			itoa(L - S, num, 10);
			
			count++;
		}
		
		printf("%d\n", count);
	}
	
	return (0);
}

void sort(char *n, int type)
{
	int i, j;
	
	for (i = 0; i < 3; i++){
		for (j = 3; j > i; j--){
			if (type == 0 && (n[j - 1] - '0') > (n[j] - '0')){
				swap(&n[j - 1], &n[j]);
			}
			
			if (type == 1 && (n[j - 1] - '0') < (n[j] - '0')){
				swap(&n[j - 1], &n[j]);
			}
		}
	}
}

void swap(char *a, char *b)
{
	char tmp = *a;
	*a = *b;
	*b = tmp;
}

Compiler output:
main.c: In function 'main':
main.c:29:25: error: implicit declaration of function 'itoa' [-Wimplicit-function-declaration]
   29 |                         itoa(L - S, num, 10);
      |                         ^~~~
Language: C

#include<stdio.h>
int main(void)
{
	int n,a[4],i,j,t,l,s,o=0;
	while(1)
	{
		o=0;
		scanf("%d",&n);
		if(n==0)
		{
			break;
		}
		while(1)
		{

			if(n==1111||n==2222||n==3333||n==4444||n==5555||n==6666||n==7777||n==8888||n=9999)
			{
				printf("NA\n");
				break;
			}
			if(n==6174)
			{
				printf("%d\n",o);
				break;
			}
			a[0]=n/1000;
			a[1]=n%1000/100;
			a[2]=n%1000%100/10;
			a[3]=n%1000%100%10;
	
			for(i=0;i<4;i++)
			{
				for(j=i+1;j<4;j++)
				{
					if(a[i]<a[j])
					{	
						t=a[i];
						a[i]=a[j];
						a[j]=t;
					}
	
				}
			}
			l=a[0]*1000+a[1]*100+a[2]*10+a[3];
			s=a[3]*1000+a[2]*100+a[1]*10+a[0];
			n=l-s;
			o++;
		}
 
	}
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:16:101: error: lvalue required as left operand of assignment
   16 |                         if(n==1111||n==2222||n==3333||n==4444||n==5555||n==6666||n==7777||n==8888||n=9999)
      |                                                                                                     ^
Language: C

#include<stdio.h>
int main(){
	int n;
	scanf("%d",&n);
	while(n!=0000){
		int a[4]={0},l[4]={0},s[4]={0},i,j,c=0,t,o;
	while(n!=6174&&n%1111!=0){
		a[0]=n/1000;
		n=n%1000;
		a[1]=n/100;
		n=n%100;
		a[2]=n/10;
		n=n%10;
		a[3]=n;
		for(i=0;i<=2;i++){
			for(j=i+1;j<=3;j++){
				if(a[i]<a[j]){
					t=a[i];
					a[i]=a[j];
					a[j]=t;
				}
			}
		}
		for(i=0;i<=3;i++){
			l[i]=a[i];
			s[3-i]=a[i];
		}
		n=(l[0]-s[0])*1000+(l[1]-s[1])*100+(l[2]-s[2])*10+l[3]-s[3];
		c++;
	}
	if(n%1111!=0){
	printf("%d",c);
	scanf("%d",&n);
	}
	else if(n==6714){
	printf("0\n");
	} 
	else{
	printf("NA\n");
	scanf("%d",&n);
	}
}

Compiler output:
main.c: In function 'main':
main.c:42:1: error: expected declaration or statement at end of input
   42 | }
      | ^