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

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; i++)
#define int long long
#define endl '\n'
using namespace std;
int dy[4] = {1, 0, -1, 0}, dx[4] = {0, 1, 0, -1};
int __gcd(int a, int b) {
    while (1) {
        if (a < b) swap(a, b);
        if (!b) break;
        a %= b;
    }
    return a;
}
int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    int a[100000];
    rep(i, n) { cin >> a[i]; }
    if (n == 2) {
        cout << max(a[0], a[1]) << endl;
        return 0;
    }
    int gcd_a = __gcd(a[0], a[1]);
    int gcd_b = __gcd(a[0], a[2]);
    int gcd_c = __gcd(a[1], a[2]);
    cout << max(gcd_a, max(gcd_b, gcd_c)) << endl;
    return 0;
}

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

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

int main() {
  int n,p,max,s=1,n2;
  cin >> n;
  n2 = n-1;
  long a[n];
  for(int i=0;i<n;i++){
    cin >> a[i];
  }
  max = max_element(a.begin(),a.end())
  for(int i=2;i<=max;i++){
    p=0;
    for(int j=0;j<n;j++){
      if(a[j]%i==0) p++; 
    }
    if(P==n2) s = i;
  }
  cout << s << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:23: error: request for member 'begin' in 'a', which is of non-class type 'long int [n]'
   15 |   max = max_element(a.begin(),a.end())
      |                       ^~~~~
a.cc:15:33: error: request for member 'end' in 'a', which is of non-class type 'long int [n]'
   15 |   max = max_element(a.begin(),a.end())
      |                                 ^~~
a.cc:16:15: error: 'i' was not declared in this scope
   16 |   for(int i=2;i<=max;i++){
      |               ^
Language: C

import math
from functools import reduce

n = int(input())
a = list(map(int, input().split()))

def gcd_list(numbers):
	return reduce(math.gcd, numbers)

gcds = [gcd_list(a[:i]+a[i+1:]) for i in range(n)]

print(max(gcds))


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

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
  int N,z,a,b,r;
  vector A<int>;
  cin >> N;
  for(int i=0;i<N;i++){
  	cin >> z;
    A.push_back(b);
  }
  sort(A.begin(), A.end(),greater<int>() );
  r = A[0] % A[1];
  while(r!=0){
    int i=1;
    A[i] = A[i+1];
    A[i+1] = r;
    r = A[i] % A[i+1];
  }
  cout << A[i];
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: expected initializer before '<' token
    7 |   vector A<int>;
      |           ^
a.cc:11:5: error: 'A' was not declared in this scope
   11 |     A.push_back(b);
      |     ^
a.cc:13:8: error: 'A' was not declared in this scope
   13 |   sort(A.begin(), A.end(),greater<int>() );
      |        ^
a.cc:21:13: error: 'i' was not declared in this scope
   21 |   cout << A[i];
      |             ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

class ExtendedEuclid{
public:
    long X, Y;
    long A, B, C;
    // C = GCD(X, Y)
    // C = A*X + B*Y

    ExtendedEuclid(long x, long y){
        X = x;
        Y = y;
    }

    void calc_gcd(){
        long a, b;
        long r, q;
        long u_2=1, u_1=0, v_2=0, v_1=1, u, v;
        a=X;
        b=Y;

        r=a%b;
        q=a/b;
        u=u_2-q*u_1;
        v=v_2-q*v_1;

        while(r!=0){
            a=b;
            b=r;
            r=a%b;

            q=a/b;
            u_2=u_1;
            u_1=u;
            v_2=v_1;
            v_1=v;

            u=u_2-q*u_1;
            v=v_2-q*v_1;
        }
        A = u_1;
        B = v_1;
        C = b;
    }
};

int main(){
    int N;
    cin>>N;
    vector<long> A(N);

    for(int i=0; i<N; ++i){
        cin>>A[i];
    }
    if(N==2){
        cout<<max(A[0], A[1])<<endl;
        return 0;
    }
    sort(A.begin(), A.end());

    ExtendedEuclid extendedeuclid(A[1], A[2]);
    extendedeuclid.calc_gcd();
    long gcd = extendedeuclid.C;
    for(int i=3; i<N; ++i){
        ExtendedEuclid extendedeuclid(gcd, A[i]);
        extendedeuclid.calc_gcd();
        gcd = extendedeuclid.C;
    }


    vector<long> gcds(N-1);
    for(int i=1; i<N; ++i){
        ExtendedEuclid extendedeuclid(A[0], A[i]);
        extendedeuclid.calc_gcd();
        gcds[i-1] = extendedeuclid.C;
    }
    sort(gcds.begin(), gcds.end());


    ExtendedEuclid extendedeuclid(gcds[0], gcds[1]);
    extendedeuclid.calc_gcd();
    long gcd2 = extendedeuclid.C;
    for(int i=2; i<N; ++i){
        ExtendedEuclid extendedeuclid(gcd2, gcds[i]);
        extendedeuclid.calc_gcd();
        gcd2 = extendedeuclid.C;
    }
        cout<<max(gcd, gcd2)<<endl;
    

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:82:20: error: redeclaration of 'ExtendedEuclid extendedeuclid'
   82 |     ExtendedEuclid extendedeuclid(gcds[0], gcds[1]);
      |                    ^~~~~~~~~~~~~~
a.cc:63:20: note: 'ExtendedEuclid extendedeuclid' previously declared here
   63 |     ExtendedEuclid extendedeuclid(A[1], A[2]);
      |                    ^~~~~~~~~~~~~~
Language: C++

#include <algorithm>
#include <cstdio>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <queue>
#include <sstream>
#include <stack>
#include <time.h>
#include <vector>
#include <complex>
#include <map>
#include <set>
#include <iomanip>
#include <math.h>
#include <stdlib.h>
#include <list>
#include <utility>
#include <memory>
#include <cstring>
#include <fstream>
#include <numeric>
#include <assert.h>
#include <bitset>
#include <ios> 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll gcd(ll a,ll b){
	if (a%b==0) return b;
	return gcd(b,a%b);
}
ll a[100004],dp[100004][2];
ll maxX(ll a,ll b){
	if (a>b) return a;
	return b;
}
int main(){
	ll n;
	cin>>n;
	for (ll i=0;i<n;i++);
		cin>>a[i];
	dp[0][1]=a[n-1];
	dp[0][0]=a[0];
	for (ll i=1;i<n;i++){
		dp[i][0]=gcd(a[i],dp[i-1][0]);
		ll qq=gcd(dp[i-1][1],a[i]);
		dp[i][1]=maxX(qq,dp[i-1][0]);
	}
	cout<<maxX(dp[n-1][0],dp[n-1][1]);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:45:24: error: 'i' was not declared in this scope
   45 |                 cin>>a[i];
      |                        ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

unsigned gcd(unsigned a, unsigned b) {
  while(1) {
    if(a < b) {
      swap(a, b);
    }
    if(!b){
      break;
    }
    a %= b;
  }
  return a;
}

int main(){
  int N;
  cin >> N;
  vector<int> A(N);
  for(int i=0;i<N;i++){
    cin >> A[i];
  }

  int result = 0;
  vector<unsigned int> s(N-1);
  int temp1 = 0;
  int temp2 = 0;
  if(N == 2){
    result = max(A[0],A[1]);
    cout << result << endl;
    return;
  }
  else if(N==3){
    for(int i=0;i<(N-1);i++){
      s[i] = gcd(A[i],A[i+1]);
    }
    result = max(s[0],s[1]);
    cout << result << endl;
    return;
  }
  else {
    for(int i=0;i<(N-1);i++){
      s[i] = gcd(A[i],A[i+1]);
      if(i>1){
        temp1 = s[i-2];
        temp2 = s[i-1];
      }
      if( (temp1 != s[i]) && (temp2 != s[i]){
        /* temp1 == temp2 */
        result = max(temp1,s[i]);
        cout << result << endl;
        return;
      }
      else if((temp1 != temp2) && ((temp1 == s[i])||(temp2 == s[i])) ){
        /* temp1 != temp2 & s[i] == temp1 or s[i] == temp2 */
        result = max(temp1,max(s[i],temp2));
        cout << result << endl;
        return;
      }

    }
  }



}



Compiler output:
a.cc: In function 'int main()':
a.cc:33:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   33 |     return;
      |     ^~~~~~
a.cc:41:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   41 |     return;
      |     ^~~~~~
a.cc:50:45: error: expected ')' before '{' token
   50 |       if( (temp1 != s[i]) && (temp2 != s[i]){
      |         ~                                   ^
      |                                             )
a.cc:63:5: error: expected primary-expression before '}' token
   63 |     }
      |     ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int gcd(int a, int b) {
  if (b == 0){
    return a;
  }
  return gcd(b, a % b);
}

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

  vector<int> a(n, 0);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }

  sort(a.begin(), a.end());

  int max_koyaku = -1;
  for (int i = 2; i < (n - 1); i += 1) {
    if (max_koyaku < 0) {
      max_koyaku = gcd(a[i], a[i+1]);
    } else {
      max_koyaku = gcd(max_koyaku, a[i+1]);
    }
  }

  if (max_koyaku < 0) {
    if (n == 2) {
      max_koyaku = a[1];
    } else {
      max_koyaku = a[2];
    }
  }

  int max_first, max_second;
  max_first = gcd(a[0], max_koyaku);
  max_second = gcd(a[1], max_koyaku);

  if (max_first > max_second) {
    cout << max_first << endl;
  } else {
    cout << max_second << endl;
  }

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   22 |   sort(a.begin(), a.end());
      |   ^~~~
      |   short
Language: C++

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

int main(){
    int n;
    cin >> n;
    vector<int> a(n),b(n);
    for(int i=0;i<n;i++) cin >> a.at(i);
    sort(a.begin(),a.end());
    b.at(0)=1;
    for(int i=0;i<n-2;i++){
        b.at(i)=gcd(gcd(a.at(i),a.at(i+1)),gcd(i+2));
        if(b.at(i+1)==1) break;
    }
    cout << b.at(i-1) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:47: error: no matching function for call to 'gcd(int)'
   13 |         b.at(i)=gcd(gcd(a.at(i),a.at(i+1)),gcd(i+2));
      |                                            ~~~^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:58,
                 from a.cc:1:
/usr/include/c++/14/numeric:173:5: note: candidate: 'template<class _Mn, class _Nn> constexpr std::common_type_t<_Mn, _Nn> std::gcd(_Mn, _Nn)'
  173 |     gcd(_Mn __m, _Nn __n) noexcept
      |     ^~~
/usr/include/c++/14/numeric:173:5: note:   candidate expects 2 arguments, 1 provided
a.cc:16:18: error: 'i' was not declared in this scope
   16 |     cout << b.at(i-1) << endl;
      |                  ^
Language: C++

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

int main(){
    int n,b,c=0;
    cin >> n;
    vector<int> a(n),b(n);
    for(int i=0;i<n;i++) cin >> a.at(i);
    sort(a.begin(),a.end());
    b.at(0)=1;
    for(int i=0;i<n-2;i++){
        b.at(i)=gcd(gcd(a.at(i),a.at(i+1)),gcd(i+2));
        if(b.at(i+1)==1) break;
    }
    cout << b.at(i-1) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:22: error: conflicting declaration 'std::vector<int> b'
    8 |     vector<int> a(n),b(n);
      |                      ^
a.cc:6:11: note: previous declaration as 'int b'
    6 |     int n,b,c=0;
      |           ^
a.cc:11:7: error: request for member 'at' in 'b', which is of non-class type 'int'
   11 |     b.at(0)=1;
      |       ^~
a.cc:13:11: error: request for member 'at' in 'b', which is of non-class type 'int'
   13 |         b.at(i)=gcd(gcd(a.at(i),a.at(i+1)),gcd(i+2));
      |           ^~
a.cc:13:47: error: no matching function for call to 'gcd(int)'
   13 |         b.at(i)=gcd(gcd(a.at(i),a.at(i+1)),gcd(i+2));
      |                                            ~~~^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:58,
                 from a.cc:1:
/usr/include/c++/14/numeric:173:5: note: candidate: 'template<class _Mn, class _Nn> constexpr std::common_type_t<_Mn, _Nn> std::gcd(_Mn, _Nn)'
  173 |     gcd(_Mn __m, _Nn __n) noexcept
      |     ^~~
/usr/include/c++/14/numeric:173:5: note:   candidate expects 2 arguments, 1 provided
a.cc:14:14: error: request for member 'at' in 'b', which is of non-class type 'int'
   14 |         if(b.at(i+1)==1) break;
      |              ^~
a.cc:16:15: error: request for member 'at' in 'b', which is of non-class type 'int'
   16 |     cout << b.at(i-1) << endl;
      |               ^~
a.cc:16:18: error: 'i' was not declared in this scope
   16 |     cout << b.at(i-1) << endl;
      |                  ^
Language: C++

import functools
import math
import copy

n=int(input())
a=list(map(int,input().split()))

ans=0
for i in range(n):
    b=copy.copy(a)
    del b[i]
    gcd=functools.reduce(math.gcd,b)
    ans=max(ans,gcd)
print(ans)

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

#include <bits/stdc++.h>
using namespace std;
 
#define clr(i, j)     memset(i, j, sizeof(i))
#define pb            push_back
 
typedef long long     ll;
 
//-*-*-*-*-*-*-*-*-



ll n,m,k,x,y,ans;ll a[9999999];
 vector<pair<ll,ll>>v;
 // vector<ll>v;
vector<pair<ll,ll>>vv;

int main()
{ 
 //clr(dp,0);
 /*

cin>>a>>n>>m;
for(int i=0;i<n;i++){
   cin>>x>>y;v.push_back({x,y});
}sort(v.begin(),v.end());
   for(int i=0;i<m;i++){
   cin>>x>>y;
   f[x]=min(y,f[x]);
}
for(int i=0;i<a;i++){
   nxt=v[t].first;ll o=
   if(f[i]&&i<=nxt){dp[t]=min(dp[i]+s*)}
}*/
cin>>n; ll pref[n];ans=1;
for(ll i=0;i<n;i++){
    cin>>a[i];
   if(i==0){pref[0]=a[i];}else{
  pref[i]=__gcd(a[i],pref[i-1]);}
}
ll gg=a[n-1];ll tt;ans=pref[n-1];
for(ll i=n-2;i>0;i--){
   ans=max(ans,__gcd(pref[i-1],gg));
   gg=__gcd(a[i],gg);if(i==1){tt=gg;}
}ans=max(ans,tt);if(n==2){ans=max(ans,max(a[0],a[1]));}ans=max(ans,pref[n-2];)
cout<<ans;
}





Compiler output:
a.cc: In function 'int main()':
a.cc:45:77: error: expected ')' before ';' token
   45 | }ans=max(ans,tt);if(n==2){ans=max(ans,max(a[0],a[1]));}ans=max(ans,pref[n-2];)
      |                                                               ~             ^
      |                                                                             )
a.cc:45:78: error: expected primary-expression before ')' token
   45 | }ans=max(ans,tt);if(n==2){ans=max(ans,max(a[0],a[1]));}ans=max(ans,pref[n-2];)
      |                                                                              ^
Language: C++

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<vector>
#include<utility>
#include<string>
#include<stack>
#include<queue>
#include<set>
#include<math.h>
#include <map>
using namespace std;
typedef long long int ll;
#define repi(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,a) repi(i,0,a)
#define all(u) u.begin(),u.end()
#define pl pair<ll,ll>
#define fi first
#define se second
#define inf 1000000007
#define mp(a,b) make_pair(a,b)

ll N;
ll A[100010];
ll Left[100010];
ll Right[100010];

ll gcd(ll a, ll b) {
    if (a < b) swap(a,b);       return b == 0 ? a : gcd(b, a%b);  
}
int main() {
    cin >> N;
    rep(i,N){
        cin >> A[i];
    }
    rep(i,N){
        if (i==0) Left[i] = A[i];
        else Left[i] = gcd(A[i],Left[i-1]);
    }
    for (ll i=N-1;i>=0;i--){
        if (i == N-1) Right[i] = A[i];
        else Right[i] = gcd(A[i],Right[i+1]);
    }
    ll ans = 0;
    rep(i,N){
        if (i==0) ans = max(ans,Right[1]);
        else if(i==N-1) ans = max(ans,Left[N-2]);
        else{
            ans = max(ans,gcd(Left[i-1],Right[i+1]));
        }
    }
    cout << ans << endl;
    
    return 0;
}


Compiler output:
a.cc:29:27: error: extended character   is not valid in an identifier
   29 |     if (a < b) swap(a,b);       return b == 0 ? a : gcd(b, a%b);  
      |                           ^
a.cc:29:32: error: extended character   is not valid in an identifier
   29 |     if (a < b) swap(a,b);       return b == 0 ? a : gcd(b, a%b);  
      |                                ^
a.cc:29:66: error: extended character   is not valid in an identifier
   29 |     if (a < b) swap(a,b);       return b == 0 ? a : gcd(b, a%b);  
      |                                                                  ^
a.cc: In function 'll gcd(ll, ll)':
a.cc:29:27: error: '\U00002028' was not declared in this scope
   29 |     if (a < b) swap(a,b);       return b == 0 ? a : gcd(b, a%b);  
      |                           ^
a.cc:29:67: error: expected ';' before '}' token
   29 |     if (a < b) swap(a,b);       return b == 0 ? a : gcd(b, a%b);  
      |                                                                   ^
      |                                                                   ;
   30 | }
      | ~                                                                  
a.cc:30:1: warning: no return statement in function returning non-void [-Wreturn-type]
   30 | }
      | ^
Language: C++

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

int main(){
    int n,b,c=0;
    cin >> n;
    vector<int> a(n);
    for(int i=0;i<n;i++) cin >> a.at(i);
    sort(a.begin(),a.end());
    for(int i=0;i<n;i++){
        if(b!=1){
            b=gcd(a);
        }
    }
    cout << b << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:18: error: no matching function for call to 'gcd(std::vector<int>&)'
   13 |             b=gcd(a);
      |               ~~~^~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:58,
                 from a.cc:1:
/usr/include/c++/14/numeric:173:5: note: candidate: 'template<class _Mn, class _Nn> constexpr std::common_type_t<_Mn, _Nn> std::gcd(_Mn, _Nn)'
  173 |     gcd(_Mn __m, _Nn __n) noexcept
      |     ^~~
/usr/include/c++/14/numeric:173:5: note:   candidate expects 2 arguments, 1 provided
Language: Java

package atcoder.abc125;

import java.util.Scanner;

public class C {

	static int gcd(int a, int b) 
	{ 
	    if (a == 0) 
	        return b; 
	    return gcd(b % a, a); 
	} 

	static int findGCD(int arr[], int n, int iExclude) 
	{ 
	    int result = arr[0];
	    if(iExclude == 0) result = arr[1];
	    for (int i = 1; i < n; i++) {
	    	if(i==iExclude) continue;
	        result = gcd(arr[i], result); 
	    }
	  
	    return result; 
	} 
	
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		
		int n = in.nextInt();
		
		int[] a = new int[n];
		
		for(int i=0; i<n; i++) {
			a[i] = in.nextInt();
		}
		
		int ans = findGCD(a, n, -1);
		
		if(n > 2)
			for(int i=0; i<n; i++) {
				int gcd = findGCD(a, n, i);
				if(gcd > ans) 
					ans = gcd;
			}
		
		System.out.println(ans);
		
		in.close();

	}

}


Compiler output:
Main.java:5: error: class C is public, should be declared in a file named C.java
public class C {
       ^
1 error
Language: C++

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

using ll=long long;
const int inf=100000000;

int in(){
  int a;
  cin >> a;
  return a;
}//int型関数の受け取り

void forin(int* x,int y){
  for (int i=0;i<y;i++){
    cin >> x[i];
  }
}//(x,y) int型配列x[y]の受け取り

int intpow(int x,int y){
  double a=x,b=y;
  return pow(a,b);
}//(x,y) xをy乗

int intfabs(int x){
  double a=x;
  return fabs(a);
}//(x) xの絶対値

int fact(int x){
  if (x == 1) return 1;
  return x*fact(x-1);
}//(x) x!

int fib(int x){
  if (x <= 2) return x;
  int a[x];
  a[0]=1;
  a[1]=2;
  for (int i=2;i<x;i++){
    a[i]=a[i-1]+a[i-2];
  }
  return a[x-1];
}//(x) フィボナッチ数列のx番目

int div1(ll x){
  return x%1000000007;
}

main(){
  int n=in(),t=0;
  vector<int> a(n);
  for (int i=0;i<n;i++) cin >> a[i];
  sort(a.begin(),a.end());
  for (int i=a[1];i>0;i++){
    for (int i2=0;i2<n;i2++){
      if (a[i]%i2!=0) t++;
      if (t==2) break;
    }
    if (t<2) break;
    t=0;
  }
  cout << i << endl;
}

Compiler output:
a.cc:49:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   49 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:62:11: error: 'i' was not declared in this scope
   62 |   cout << i << endl;
      |           ^
Language: C++

#include <bits/stdc++.h>
#include <vector>
#include <string.h>

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

unsigned gcd(unsigned a, unsigned b) {
  if(a < b) euclidean_gcd(b, a);
  unsigned r;
  while ((r=a%b)) {
    a = b;
    b = r;
  }
  return b;
}

void solve(){
  int n;
  cin >> n;
  vector<int> a;
  rep(i,n){
    int k;
    cin >> k;
    a.push_back(k);
  }
  int x=0;
  //抜く文字a[i]
  for(int i=0; i<n; i++){
    int y=0;
    for(int j=0; j<n; j++){
      if(j!=i){
      if(j==0){y=a[j];}
      else if(i==0&&j==1){y=a[j];}
      else{y=gcd(y,a[j]);}
    }

    }
    //cout << i << " " << x << endl;
    x=max(x,y);
  }
  cout << x << endl;
}

int main(){
  solve();
  return 0;
}


Compiler output:
a.cc: In function 'unsigned int gcd(unsigned int, unsigned int)':
a.cc:9:13: error: 'euclidean_gcd' was not declared in this scope
    9 |   if(a < b) euclidean_gcd(b, a);
      |             ^~~~~~~~~~~~~
Language: C++

#include<iostream>
#include<algorithm>
#include<string>
#include<cstring>
#include<map>
#include<set>
#include<list>
#include<stack>
#include<queue>
#include<cstdio>
#include<cmath>
#include<cctype>
#include<iomanip>
using namespace std;
typedef long long ll;
const int N = 2e5+5;
int a[200005];
int gcd( int a, int b)
{
    if(a<b)swap(a,b);
    if(b==0) return a;
    else  return gcd(b,a%b);
}
set<int,greater<set>> s;
int main()
{
    ios::sync_with_stdio(false);
    // freopen("D:\\in.txt","r",stdin);
    // freopen("D:\\out.txt","w",stdout);
    int n;
    cin>>n;
    for(int i=0;i<n;i++)
    {
        cin>>a[i];
    }
    sort(a,a+n);
    for(int i=0,j=n-1;i<j;i++,j--)
    {
        s.insert(gcd(a[i],a[j]));
    }
    set<int,greater<int> >::iterator ite=s.begin();
    cout<<*ite<<endl;
    return 0;
}


Compiler output:
a.cc:24:17: error: type/value mismatch at argument 1 in template parameter list for 'template<class _Tp> struct std::greater'
   24 | set<int,greater<set>> s;
      |                 ^~~
a.cc:24:17: note:   expected a type, got 'set'
a.cc:24:20: error: template argument 2 is invalid
   24 | set<int,greater<set>> s;
      |                    ^~
a.cc: In function 'int main()':
a.cc:39:11: error: request for member 'insert' in 's', which is of non-class type 'int'
   39 |         s.insert(gcd(a[i],a[j]));
      |           ^~~~~~
a.cc:41:44: error: request for member 'begin' in 's', which is of non-class type 'int'
   41 |     set<int,greater<int> >::iterator ite=s.begin();
      |                                            ^~~~~
Language: C++

#include <iostream>
#include <vector>
#include <numeric>

using namespace std;

int gcd(int a, int b) {
  if (a == 0) return b;
  return gcd(b % a, a);
}

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

  vector<int> A(N, 0);
  for (int i = 0; i < N; i++) {
    cin >> A[i];
  }

  sort(A.begin(), A.end());

  int result_1 = A[0];
  int result_2 = A[1];

  for (int i = 0; i < N; i++) {
    if (i == 0) {
      result_1 = gcd(A[i], result_1);
    } else if (i == 1) {
      result_2 = gcd(A[i], result_2);
    } else {
      result_1 = gcd(A[i], result_1);
      result_2 = gcd(A[i], result_2);
    }
  }

  if (result_1 > result_2) {
    cout << result_1 << '\n';
  } else {
    cout << result_2 << '\n';
  }

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   21 |   sort(A.begin(), A.end());
      |   ^~~~
      |   short
Language: C

#include<stdio.h>

long gcd(a, b) {
    if (b == 0)
        return a;

    return gcd(b, a % b);
}

int main(){
  int i,j,k;
  int N;
  long max;
  scanf("%d",&N);
  long A[N];
  for(i=0;i<N;i++){
  	scanf("%ld ",&A[i]);
    if(i>0){
      B[i] = gcd(B[i-1],A[i]); 
    }
    else
      B[0]=A[i];
  }
  
  printf("%ld\n",B[N-2]);
  return 0;
}
  
  
  
  

Compiler output:
main.c: In function 'gcd':
main.c:3:6: error: type of 'a' defaults to 'int' [-Wimplicit-int]
    3 | long gcd(a, b) {
      |      ^~~
main.c:3:6: error: type of 'b' defaults to 'int' [-Wimplicit-int]
main.c: In function 'main':
main.c:19:7: error: 'B' undeclared (first use in this function)
   19 |       B[i] = gcd(B[i-1],A[i]);
      |       ^
main.c:19:7: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,ll> pi;

ll N, M, Q, A, B, C, arr[200005], lgcd[200005], rgcd[200005];
string s, p;

ll gcd(ll x, ll y){
	if (!x || !y) return x+y;
	return gcd(y,x%y);
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	sieve();
	cin >> N;
	for (int i = 1; i <= N; ++i){
		cin >> arr[i];
		lgcd[i] = gcd(arr[i],lgcd[i-1]);
	}
	for (int i = N; i >= 1; --i){
		rgcd[i] = gcd(arr[i],rgcd[i+1]);
	}
	for (int i = 1; i <= N; ++i){
		A = max(A,gcd(lgcd[i-1],rgcd[i+1]));
	}
	cout << A << '\n';
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: 'sieve' was not declared in this scope
   18 |         sieve();
      |         ^~~~~
Language: C++

#include<iostream>
#include<vector>
#include<algorithm>

using namespace std;

int main(){
  int n;
  int i,j,k=1,com;
  vector <int> v;
  
  cin>>n;
  for(i=0;i<n;i++){
    cin>>j;
   v.push_back(j);
  }
  sort(v.begin(),v.end());
  for(i=2;i<=v[1];i++){
    com=0;
    for(j=0;j<n;j++){
      if(v[j]%!=0)
        com++;
      if(com==2)
        break;
    }
    if(com==n-1)
      k=i;
  }
  cout<<k<<endl;
  return 0;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:15: error: expected primary-expression before '!=' token
   21 |       if(v[j]%!=0)
      |               ^~
Language: C++

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

using ll = long long;
const int MOD = 1000000007;
#ifdef LOCAL_ENV
    #define debug(var) std::cout<<#var" = "<<var<<std::endl
#else
    #define debug(var)
#endif
#define p(var)  std::cout<<var<<std::endl
#define PI (acos(-1))
#define rep(i, n)   for(int i=0, i##_length=(n); i< i##_length; ++i)
#define repeq(i, n) for(int i=1, i##_length=(n); i<=i##_length; ++i)
#define all(a) (a).begin(), (a).end()
#define pb push_back
inline double isnatural(double a) { return a>=0 && ceil(a)==floor(a); }
template<typename T> inline T gcd(T a, T b) { return b ? gcd(b,a%b) : a; }
template<typename T> inline T lcm(T a, T b) { return a / gcd(a,  b) * b; }
template<typename T1, typename T2>inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
template<typename T1, typename T2>inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }
template<typename T1, typename T2> ostream& operator<<(ostream& s, const pair<T1, T2>& p) {return s << "(" << p.first << ", " << p.second << ")";}

/*-----8<-----8<-----*/


int main(){
    int n;
    cin >> n;
	vector<ll> a(n,0);
	rep(i,n){
		cin >> a[i];
	}
  
	ll maxval=0;
	rep(i,n){
		[&]{
			ll gcdval;
			gcdval=i==0?a[1]:a[0];
			rep(j,n){
				if(i==j)continue;
				//if(gcdval<a[j])swap(gcdval,a[j]);
				gcdval=__gcd(gcdval,a[j]);
				if(gcdval<maxval)return;
			}
			//debug(gcdval);
			chmax(maxval,gcdval);
		}
	}


	p(maxval);
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:48:18: error: expected ';' before '}' token
   48 |                 }
      |                  ^
      |                  ;
   49 |         }
      |         ~
Language: C++

#include<iostream>
using namespace std;

int main(){
  int N;
  int ans = 0;
  cin >> N;
  int A[N];
  for(int i=0;i<N;i++){
    cin >> A[i];
  }
  for(int i=0;i<N;i++){
    for(int j=0;j<N;j++){
      if(i != j){
   	   ans = max(A[i]/A[j],A[i]/A[j+1])
      }else{
      }
    }
  }
  cout << ans << endl;
}
    
  

Compiler output:
a.cc: In function 'int main()':
a.cc:15:44: error: expected ';' before '}' token
   15 |            ans = max(A[i]/A[j],A[i]/A[j+1])
      |                                            ^
      |                                            ;
   16 |       }else{
      |       ~
Language: C++

#include<iostream>
#include<vector>
#include<algorithm>

using namespace std;

int main(){
  int n;
  int i,j,k=1,com;
  vector <int> v;
  
  cin>>n;
  for(i=0;i<n;i++){
    cin>>j;
   v.push_back(j);
  }
  sort(v.begin(),v.end());
  for(i=2;i<=v[1];i++){
    com=0
    for(j=0;j<n;j++){
      if(v[j]%i==0)
        com++;
    }
    if(com==n-1)
      k=i;
  }
  cout<<k<<endl;
  return 0;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:10: error: expected ';' before 'for'
   19 |     com=0
      |          ^
      |          ;
   20 |     for(j=0;j<n;j++){
      |     ~~~   
a.cc:20:20: error: expected ';' before ')' token
   20 |     for(j=0;j<n;j++){
      |                    ^
      |                    ;
Language: C++

#include<bits/stdc++.h>
#define LL long long
#define MOD 1000000007
using namespace std;

struct data{
	vector <LL> faktor;
	unordered_map <LL,LL> faktorCount;
};

data ar;

void faktorin(LL n){
	for(LL i=1;i*i<=n;i++){
		if (i*i==n){
			ar.faktor.push_back(i);
			ar.faktorCount[i]++;
		}
		else if (n%i==0){
			ar.faktor.push_back(i);
			ar.faktorCount[i]++;
			ar.faktor.push_back(n/i);
			ar.faktorCount[n/i]++;
		}
	}
}

int main(){
  	ios::sync_with_stdio(FALSE);
  	cin.tie(NULL);
	LL n;
	cin>>n;
	for(LL i=1;i<=n;i++){
		LL a;
		cin>>a;
		faktorin(a);
	}
	LL x=0;
	for(LL i=0;i<ar.faktor.size();i++){
		if (ar.faktorCount[ar.faktor[i]]>1){
			x=max(x,ar.faktor[i]);
		}
	}
	cout<<x<<endl;
}


Compiler output:
a.cc:11:1: error: reference to 'data' is ambiguous
   11 | data ar;
      | ^~~~
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/range_access.h:344:5: note: candidates are: 'template<class _Tp> constexpr const _Tp* std::data(initializer_list<_Tp>)'
  344 |     data(initializer_list<_Tp> __il) noexcept
      |     ^~~~
/usr/include/c++/14/bits/range_access.h:334:5: note:                 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::data(_Tp (&)[_Nm])'
  334 |     data(_Tp (&__array)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/14/bits/range_access.h:323:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(const _Container&)'
  323 |     data(const _Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
/usr/include/c++/14/bits/range_access.h:312:5: note:                 'template<class _Container> constexpr decltype (__cont.data()) std::data(_Container&)'
  312 |     data(_Container& __cont) noexcept(noexcept(__cont.data()))
      |     ^~~~
a.cc:6:8: note:                 'struct data'
    6 | struct data{
      |        ^~~~
a.cc: In function 'void faktorin(long long int)':
a.cc:16:25: error: 'ar' was not declared in this scope
   16 |                         ar.faktor.push_back(i);
      |                         ^~
a.cc:20:25: error: 'ar' was not declared in this scope
   20 |                         ar.faktor.push_back(i);
      |                         ^~
a.cc: In function 'int main()':
a.cc:29:30: error: 'FALSE' was not declared in this scope
   29 |         ios::sync_with_stdio(FALSE);
      |                              ^~~~~
a.cc:39:22: error: 'ar' was not declared in this scope
   39 |         for(LL i=0;i<ar.faktor.size();i++){
      |                      ^~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long
typedef pair<ll,ll> P;
#define M 1000000007
int gcd(int a,int b){
  if(a%b==0){
    return b;
  }
  return gcd(b,a%b);
}
int main(){
  int n;
  cin>>n;
  vector<int> a(n);
  for(int i=0;i<n;i++) cin>>a[i];
  sort(a.begin(),a.end(),greater<int>());
  if(n==2){
    cout<<a[0];
    return 0;
  }
  int s=a[0],t=a[1];
  for(int i=2;i<n;i++){
    s=gcd(s,a[i]);
    t=gcd(t,a[i]);
  }
  int m=gcd(a[0],a[1]);
  bool f=true,ff==true;
  for(int i=0;i<n;i++){
    if(a[i]%m!=0){
      if(f){
        f=false;
      }else{
        ff=false;
      }
    }
  }
  if(ff)cout<<max({s,t,m});
  else cout<<max(s,t);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:17: error: expected initializer before '==' token
   28 |   bool f=true,ff==true;
      |                 ^~
a.cc:34:9: error: 'ff' was not declared in this scope; did you mean 'f'?
   34 |         ff=false;
      |         ^~
      |         f
a.cc:38:6: error: 'ff' was not declared in this scope; did you mean 'f'?
   38 |   if(ff)cout<<max({s,t,m});
      |      ^~
      |      f
Language: C++

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

int gcd(int a, int b) {
    if (b == 0) return a;
    return gcd(b, a % b);
}

int main() {
    cin.tie(0); cout.tie(0);
    ios::sync_with_stdio(false);
    int N;
    cin >> N;
    vector<int> A_list(N);
    for (int i = 0; i < N; i++) {
        int tmp;
        cin >> tmp;
        A_list.at(i) = tmp;
    }
    vector<int> prefix_gcd(N);
    int cur_gcd = A_list.at(0);
    prefix_gcd.at(0) = cur_gcd;
    for (int i = 1; i < N; i++) {
        cur_gcd = gcd(cur_gcd, A_list.at(i));
        prefix_gcd.at(i) = cur_gcd;
    }
    vector<int> suffix_gcd(N);
    cur_gcd = A_list.at(N - 1);
    suffix_gcd.at(N - 1) = cur_gcd;
    for (int i = N - 2; i >= 0; i--) {
        cur_gcd = gcd(cur_gcd, A_list.at(i));
        suffix_gcd.at(i) = cur_gcd;
    }
    int max_gcd = suffix_gcd.at(0);
    for (int i = 0; i < N - 2; i++) {
        max_gcd = max(max_gcd, gcd(prefix_gcd.at(i), suffix_gcd.at(i + 2)));
    }
    max_gcd = max(max_gcd, prefix_gcd.at(N - 2));
    cout << max_gcd << "\n";
}
}

Compiler output:
a.cc:41:1: error: expected declaration before '}' token
   41 | }
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long
typedef pair<ll,ll> P;
#define M 1000000007
int gcd(int a,int b){
  if(a%b==0){
    return b;
  }
  return gcd(b,a%b);
}
int main(){
  int n;
  cin>>n;
  vector<int> a(n);
  for(int i=0;i<n;i++) cin>>a[i];
  sort(a.begin(),a.end(),greater<int>());
  if(n==2){
    cout<<a[0];
    return 0;
  }
  int s=a[0],t=a[1];
  for(int i=2;i<n;i++){
    s=gcd(s,a[i]);
    t=gcd(t,a[i]);
  }
  int m=gcd(a[0],a[1]);
  bool f=true;ff==true;
  for(int i=0;i<n;i++){
    if(a[i]%m!=0){
      if(f){
        f=false;
      }else{
        ff=false;
      }
    }
  }
  if(ff)cout<<max({s,t,m});
  else cout<<max(s,t);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:15: error: 'ff' was not declared in this scope; did you mean 'f'?
   28 |   bool f=true;ff==true;
      |               ^~
      |               f
Language: C++

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

int main(){
  int N;
  cin>>N;
  int mn=1000000000;
  vector<int> A;
  for(int i=0; i<N; ++i){
    int a;
    cin>>a;
    A.push_back(a);
  }
  
  sort(A.begin(),A.end());
  
  int ans=0;
  for(int i=A[0]; i>0; --i){
    int count=0;
    for(j=0; j<N; ++j){
      if(A[j]%i==0) count++;
    }
    if(count>=N-1){
      ans=i;
      break;
    }
  }
  
  cout<<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:9: error: 'j' was not declared in this scope
   25 |     for(j=0; j<N; ++j){
      |         ^
Language: C++

#include <iostream>
#include <algorithm>
#include <iomanip>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <numeric>
#include <bitset>
#include <cmath>

static const int MOD = 1000000007;
using ll = long long;
using u32 = uint32_t;
using namespace std;

template<class T> constexpr T INF = ::numeric_limits<T>::max()/32*15+208;

template<class T>
vector<T> divisor(T n){
    vector<T> ret;
    for(T i = 1; i * i <= n; i++) {
        if(n % i == 0) {
            ret.push_back(i);
            if(i * i != n) ret.push_back(n / i);
        }
    }
    sort(begin(ret), end(ret));
    return(ret);
}

int main() {
    int n;
    cin >> n;
    vector<int> v(n);
    for (auto &&i : v) scanf("%d", &i);
    int valid = true;
    for (int i = 0; i < n-1; ++i) {
        if(v[i] != v[i+1]) valid = false;
    }
    if(valid) {
        cout << v[0] << "\n";
        return 0;
    }
    map<int, int> m;
    for (int i = 0; i < n; ++i) {
        for (auto &&j : divisor(v[i])) {
            m[j]++;
        }
    }
    int ans = g;
    for (auto &&k : m) {
        if(k.second >= n-1){
            ans = max(ans, k.first);
        }
    }
    cout << ans << "\n";
    return 0;
}

Compiler output:
a.cc:14:13: error: 'uint32_t' does not name a type
   14 | using u32 = uint32_t;
      |             ^~~~~~~~
a.cc:11:1: note: 'uint32_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
   10 | #include <cmath>
  +++ |+#include <cstdint>
   11 | 
a.cc: In function 'int main()':
a.cc:51:15: error: 'g' was not declared in this scope
   51 |     int ans = g;
      |               ^
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <tuple>
#include <climits>
#include <cmath>
#include <unordered_map>

using namespace std;

typedef long long ll;

int gcd(int a, int b) {
  if (a < b)
    gcd(b, a);
  int r;
  while ( (r = a % b) ) {
    a = b;
    b = r;
  }
  return b;
}

int main(void) {
  int N; cin >> N;
  vector<int> A(N, 0);
  for (int i = 0; i < N; i++) { cin >> A[i]; }
  // sort(A.begin(), A.end());
  // for (auto v : A) { cout << v << " "; } cout << endl;

  vector<int> eGCD(N, 0);
  int maxGCDI = -1;
  for (int i = 0; i < N; i++) {
    int gcdi = -1;
    for (int j = 0; j < N; j++) {
      if (j == i)
        continue;
      if (gcdi < 0)
        gcdi = A[j];
      } else {
        gcdi = gcd(gcdi, A[j]);
        if (gcdi < maxGCDI)
          break;
      }
    }
    if (gcdi > maxGCDI)
      maxGCDI = gcdi;
    if (maxGCDI == 1)
      break;
  }

  cout << maxGCDI << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:41:9: error: 'else' without a previous 'if'
   41 |       } else {
      |         ^~~~
a.cc:42:28: error: 'j' was not declared in this scope
   42 |         gcdi = gcd(gcdi, A[j]);
      |                            ^
a.cc:47:9: error: 'gcdi' was not declared in this scope; did you mean 'gcd'?
   47 |     if (gcdi > maxGCDI)
      |         ^~~~
      |         gcd
a.cc:50:7: error: break statement not within loop or switch
   50 |       break;
      |       ^~~~~
a.cc: At global scope:
a.cc:53:3: error: 'cout' does not name a type
   53 |   cout << maxGCDI << endl;
      |   ^~~~
a.cc:54:1: error: expected declaration before '}' token
   54 | }
      | ^
Language: C++

#include<bits/stdc++.h>
int main()
{
  int N;
  std::cin>>N;
  std::vector<int>A(N);
  for (int i=0;i<N;i++){
  std::cin>>A[i];
  }
  auto f=[](ll A){
    std::vector<ll> ans;
    for (int i=1;i*i<=A;i++){
      if (A%i==0){
        ans.push_back(i),ans.push_back(A/i);
      }
    }
    return ans;
  };
  ll ans=1;
  for(const ll d:f(A[0])){
    int n=0;
    for(int i=0;i<N;i++){
      if(A[i]%d==0){n++;}
    }
    if(n>=N-1){ans=std::max(ans,d);}
  }
  for(const ll d:f(A[1])){
    int n=0;
    for(int i=0;i<N;i++){
      if(A[i]%d==0){n++;}
    }
    if(n>=N-1){ans=std::max(ans,d);}
  }
  std::cout<<ans<<std::endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: 'll' has not been declared
   10 |   auto f=[](ll A){
      |             ^~
a.cc: In lambda function:
a.cc:11:17: error: 'll' was not declared in this scope
   11 |     std::vector<ll> ans;
      |                 ^~
a.cc:11:19: error: template argument 1 is invalid
   11 |     std::vector<ll> ans;
      |                   ^
a.cc:11:19: error: template argument 2 is invalid
a.cc:14:13: error: request for member 'push_back' in 'ans', which is of non-class type 'int'
   14 |         ans.push_back(i),ans.push_back(A/i);
      |             ^~~~~~~~~
a.cc:14:30: error: request for member 'push_back' in 'ans', which is of non-class type 'int'
   14 |         ans.push_back(i),ans.push_back(A/i);
      |                              ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:19:3: error: 'll' was not declared in this scope
   19 |   ll ans=1;
      |   ^~
a.cc:20:13: error: 'll' does not name a type
   20 |   for(const ll d:f(A[0])){
      |             ^~
a.cc:26:4: error: expected ';' before 'for'
   26 |   }
      |    ^
      |    ;
   27 |   for(const ll d:f(A[1])){
      |   ~~~
a.cc:27:3: error: expected primary-expression before 'for'
   27 |   for(const ll d:f(A[1])){
      |   ^~~
a.cc:26:4: error: expected ';' before 'for'
   26 |   }
      |    ^
      |    ;
   27 |   for(const ll d:f(A[1])){
      |   ~~~
a.cc:27:3: error: expected primary-expression before 'for'
   27 |   for(const ll d:f(A[1])){
      |   ^~~
a.cc:26:4: error: expected ')' before 'for'
   26 |   }
      |    ^
      |    )
   27 |   for(const ll d:f(A[1])){
      |   ~~~
a.cc:20:6: note: to match this '('
   20 |   for(const ll d:f(A[0])){
      |      ^
a.cc:27:13: error: 'll' does not name a type
   27 |   for(const ll d:f(A[1])){
      |             ^~
a.cc:33:4: error: expected ';' before 'std'
   33 |   }
      |    ^
      |    ;
   34 |   std::cout<<ans<<std::endl;
      |   ~~~
a.cc:34:14: error: 'ans' was not declared in this scope; did you mean 'abs'?
   34 |   std::cout<<ans<<std::endl;
      |              ^~~
      |              abs
a.cc:35:3: error: expected primary-expression before 'return'
   35 |   return 0;
      |   ^~~~~~
a.cc:34:29: error: expected ')' before 'return'
   34 |   std::cout<<ans<<std::endl;
      |                             ^
      |                             )
   35 |   return 0;
      |   ~~~~~~                     
a.cc:27:6: note: to match this '('
   27 |   for(const ll d:f(A[1])){
      |      ^
Language: C++

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

typedef vector<int> vi;

int main() {
    int n;
    vi a;
    scanf("%d", &n);
    for (int i = 0; i < n; i++) {
        int v;
        scanf("%d", &v);
        a.push_back(v);
    }
    vi cand;
    for (int i = 0; i < 2; i++)
        for (int d = 1; d * d <= a[i]; d++)
            if (a[i] % d == 0) {
                cand.push_back(d);
                cand.push_back(a[i] / d);
            }
    int ans = 1;
    for (auto v : cand) {
        int cnt = 0;
        for (auto aa : a[i])
            if (aa % v == 0)
                cnt++;
        if (cnt >= n - 1)
            ans = max(ans, v);
    }
    printf("%d\n", ans);

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:26: error: 'i' was not declared in this scope
   27 |         for (auto aa : a[i])
      |                          ^
Language: C++

#include <string>
#include <vector>
#include <map>
#include <iostream>
#define MAXC 222222
#define MODD 1000000007
#define ll long long
using namespace std;


int A[111111];
int fwd_gcd[111111];
int bck_gcd[111111];

int GetGcd(int x,int y) {
    if (x == 0)
        return y;
    if (y == 0)
        return x;
    return __gcd(x,y);
}

int main() {
    int N;
    cin>>N;
    for(int i=1;i<=N;i++) {
        cin>>A[i];
    }
    
    fwd_gcd[0]=0;
    fwd_gcd[1]=A[1];
    for(int i=2;i<=N;i++){
        fwd_gcd[i]=__gcd(fwd_gcd[i-1],A[i]);
    }
    
    
    bck_gcd[0]=0;
    bck_gcd[N]=A[N];
    for(int i=N-1;i>=1;i--) {
        bck_gcd[i]=__gcd(bck_gcd[i+1],A[i]);
    }
    
    
    int ans = fwd_gcd[N];

    for(int i=1;i<=N;i++) {
        ans = max(ans, GetGcd(fwd_gcd[i-1],bck_gcd[i+1]));
    }
    cout << ans << endl;
    
}

Compiler output:
a.cc: In function 'int GetGcd(int, int)':
a.cc:20:12: error: '__gcd' was not declared in this scope; did you mean 'fwd_gcd'?
   20 |     return __gcd(x,y);
      |            ^~~~~
      |            fwd_gcd
a.cc: In function 'int main()':
a.cc:33:20: error: '__gcd' was not declared in this scope; did you mean 'fwd_gcd'?
   33 |         fwd_gcd[i]=__gcd(fwd_gcd[i-1],A[i]);
      |                    ^~~~~
      |                    fwd_gcd
a.cc:40:20: error: '__gcd' was not declared in this scope; did you mean 'fwd_gcd'?
   40 |         bck_gcd[i]=__gcd(bck_gcd[i+1],A[i]);
      |                    ^~~~~
      |                    fwd_gcd
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int gcd(int a, int b)
{
    if(b == 0) return a;
    return gcd(b, a%b);
}

int main()
{
    int n;
    cin >> n;
    vector<int> a(n);
    for(int i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    for(int i = 0; i < n; i++)
    {
        int tmp = 1;
        for(int j = 0; j < n; j++)
        {
            if(j != i)
            {
                tmp = gcd(tmp, a[j]);
            }
        }
        ans = max(ans, tmp);
    }
    cout << ans << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:29:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   29 |         ans = max(ans, tmp);
      |         ^~~
      |         abs
a.cc:31:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   31 |     cout << ans << endl;
      |             ^~~
      |             abs
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define ALL(V) (V).begin(), (V).end()
#define ALLR(V) (V).rbegin(), (V).rend()
#define DEBUGGING

template <typename T> using V = vector<T>;
template <typename T> using VV = V<V<T>>;
template <typename T, typename U> using P = pair<T, U>;
using ll = int64_t;
using PLL = P<ll, ll>;

template <typename T> const T& var_min(const T &t) { return t; }
template <typename T> const T& var_max(const T &t) { return t; }
template <typename Head, typename... Tail> const Head& var_min(const Head &head, const Tail&... tail) { return min(head, var_min(tail...)); }
template <typename Head, typename... Tail> const Head& var_max(const Head &head, const Tail&... tail) { return max(head, var_max(tail...)); }
template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); }
template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); }

namespace __init {

struct InitIO {
    InitIO() {
        cin.tie(0);
        ios_base::sync_with_stdio(false);
        cout << fixed << setprecision(30);
    }
} init_io;

}

#ifdef DEBUGGING
#include "../debug.cpp"
#else
#define DEBUG(...) 0
#endif

template <typename T>
T make_v(T init) { return init; }

template <typename T, typename... Tail>
auto make_v(T init, size_t s, Tail... tail) {
#define rec make_v(init, tail...)
    return V<decltype(rec)>(s, rec);
#undef rec
}

int main() {
    ll N;
    cin >> N;
    V<ll> A(N);
    for(ll &e : A) cin >> e;

    bool same = true;
    for(ll i = 1; i < N; i++) same &= (A[i - 1] == A[i]);
    if(same) {
        cout << A[0] << endl;
        return 0;
    }

    sort(ALL(A));

    ll ans = 1;
    for(ll i = 0; i <= 1; i++) {
        ll e = A[i];
        for(ll j = 1; j * j <= e; j++) {
            if(e % j) continue;
            for(ll d : { j, e / j }) {
                ll cnt = 0;
                for(ll k = 0; k < N; k++) cnt += !!(A[k] % d);
                if(cnt == 1) chmax(ans, d);
            }
        }
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc:34:10: fatal error: ../debug.cpp: No such file or directory
   34 | #include "../debug.cpp"
      |          ^~~~~~~~~~~~~~
compilation terminated.