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

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

/*
,,,,
　　　　　　　　　　　　　　　　　　　　　　　　　　,.斗*''“i:i:{
　　　　　　　　　　　　　,.　｡. . . * : : : ''' : : : :” :”“ ''ｰ - 弋,,_
　　　　　 　 　 ,.斗*''“ : : : : : : : : : : : : : ' ' ' ' ' ' : : : : : : : : : : :”: '':* ｡ ,
　　　 ,.斗*''“ ” ＼：　　 ”・・． ' ' ' '　　　　　　　　 ' ' ' ' : : : : : : : : : : : : ”ミ*｡,,,,,,　　　　　　 　 　 　 ＿
　　く.　 ◎　 ﾞ:.ﾞ:..　ﾟ:,　:　───────────　　　--　　,,,,,,__ ' ' ' :.:.:.:.:.”≧s｡.　　＿,,,｡s*i:i:i:i:<
　　ﾏ*s｡ :,　 }　ﾟ:,　 :}　　　　　　　　　　　　　　　　　　　　　　　　　　　　”　''　-　”””：：”：：`*｡i:i:i:i:i:i:i;:’
　　　` .｡`　 ,　,ノ ／｡ ,,,_　　　　　　　　　　　　　　　　　　　　　　　　　　　　　＿＿`　　} }　　ﾉi:i:i:i:i:ﾂ
　　　　　 `　*　｡　　`*｡i:i:i::*=-　　　　　　　　　　　＿＿　　　　　　,,,....｡s*'i,:’　　　”`*｡＿,*’i:i:i:i:r’
　　　　　　　　　　　”　─ --　　　　｡｡｡｡｡　　 -　－`''''''''ヽ ─ '''”　　　｀ｰ“　　　　　　　`*｡i:i:i:i:i:i:
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　`*｡i:i:::
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　`*ﾟ:,
         fozubaoyou    no BUGs alive!
*/

typedef long long ll;
//{
#define mp make_pair
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define dumo dump
#define sysp system("pause")
//}

#define debug_interval ','
#define dump_interval ' '
#define debug_toggle 0

//{
inline int toInt(string s){int v;istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x){ostringstream sout;sout<<x;return sout.str();}
template<class...A> inline void dump(){cout<<endl;}
template<class...A> inline void dump_rest() {cout<<endl;}
template<class T, class...A> inline void dump_rest(const T& first, const A&... rest){cout<<dump_interval<<first;dump_rest(rest...);}
template<class T,class...A> inline void dump(const T&first,const A&...rest){cout<<first;dump_rest(rest...);}
template<class...A> inline void debug(){cout<<endl;}
template<class...A> inline void debug_rest() {cout<<endl;}
template<class T, class...A> inline void debug_rest(const T& first, const A&... rest){cout<<debug_interval<<first;debug_rest(rest...);}
template<class T,class...A> inline void debug(const T&first,const A&...rest){if(debug_toggle)cout<<first,debug_rest(rest...);}
inline long long digitsum(long long v){long long d=0;while(v){d+=v%10;v/=10;}return d;}
inline long long digitnumbersum(long long a){long long b=0;while(a){a/=10;b++;}return b;}
inline long long mysqrt(long long a){long long i=0;for(i=1;a>0;i++){a-=i*2+1;}return i-1;}
//}

long long n,ans,sum;
vector<int>v;

int main(){
	cin>>n;
	int a[n];
	for(int i=0;i<n;i++){
		cin>>a[i];
	}
	reverse(sort(a,a+n));
	for(int i=0;i<n-1;){
		if(v.size()==2){
			dump(v[1]*v[2]);
			return 0;
		}
		if(a[i]==a[i+1]){
			v.push_back(a[i]);
			i+=2;
		}else{
			i++;
		}
	}
	dumo(0);
	system("pause");
}
 

Compiler output:
a.cc: In function 'int main()':
a.cc:58:21: error: invalid use of void expression
   58 |         reverse(sort(a,a+n));
      |                 ~~~~^~~~~~~
Language: C++

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

/*
,,,,
　　　　　　　　　　　　　　　　　　　　　　　　　　,.斗*''“i:i:{
　　　　　　　　　　　　　,.　｡. . . * : : : ''' : : : :” :”“ ''ｰ - 弋,,_
　　　　　 　 　 ,.斗*''“ : : : : : : : : : : : : : ' ' ' ' ' ' : : : : : : : : : : :”: '':* ｡ ,
　　　 ,.斗*''“ ” ＼：　　 ”・・． ' ' ' '　　　　　　　　 ' ' ' ' : : : : : : : : : : : : ”ミ*｡,,,,,,　　　　　　 　 　 　 ＿
　　く.　 ◎　 ﾞ:.ﾞ:..　ﾟ:,　:　───────────　　　--　　,,,,,,__ ' ' ' :.:.:.:.:.”≧s｡.　　＿,,,｡s*i:i:i:i:<
　　ﾏ*s｡ :,　 }　ﾟ:,　 :}　　　　　　　　　　　　　　　　　　　　　　　　　　　　”　''　-　”””：：”：：`*｡i:i:i:i:i:i:i;:’
　　　` .｡`　 ,　,ノ ／｡ ,,,_　　　　　　　　　　　　　　　　　　　　　　　　　　　　　＿＿`　　} }　　ﾉi:i:i:i:i:ﾂ
　　　　　 `　*　｡　　`*｡i:i:i::*=-　　　　　　　　　　　＿＿　　　　　　,,,....｡s*'i,:’　　　”`*｡＿,*’i:i:i:i:r’
　　　　　　　　　　　”　─ --　　　　｡｡｡｡｡　　 -　－`''''''''ヽ ─ '''”　　　｀ｰ“　　　　　　　`*｡i:i:i:i:i:i:
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　`*｡i:i:::
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　`*ﾟ:,
         fozubaoyou    no BUGs alive!
*/

typedef long long ll;
//{
#define mp make_pair
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define dumo dump
#define sysp system("pause")
//}

#define debug_interval ','
#define dump_interval ' '
#define debug_toggle 0

//{
inline int toInt(string s){int v;istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x){ostringstream sout;sout<<x;return sout.str();}
template<class...A> inline void dump(){cout<<endl;}
template<class...A> inline void dump_rest() {cout<<endl;}
template<class T, class...A> inline void dump_rest(const T& first, const A&... rest){cout<<dump_interval<<first;dump_rest(rest...);}
template<class T,class...A> inline void dump(const T&first,const A&...rest){cout<<first;dump_rest(rest...);}
template<class...A> inline void debug(){cout<<endl;}
template<class...A> inline void debug_rest() {cout<<endl;}
template<class T, class...A> inline void debug_rest(const T& first, const A&... rest){cout<<debug_interval<<first;debug_rest(rest...);}
template<class T,class...A> inline void debug(const T&first,const A&...rest){if(debug_toggle)cout<<first,debug_rest(rest...);}
inline long long digitsum(long long v){long long d=0;while(v){d+=v%10;v/=10;}return d;}
inline long long digitnumbersum(long long a){long long b=0;while(a){a/=10;b++;}return b;}
inline long long mysqrt(long long a){long long i=0;for(i=1;a>0;i++){a-=i*2+1;}return i-1;}
//}

long long n,ans,sum;
vector<int>v;

int main(){
	cin>>n;
	int a[n];
	for(int i=0;i<n;i++){
		cin>>a[i];
	}
	sort(a.rbegin(),a.rend());
	for(int i=0;i<n-1;){
		if(v.size()==2){
			dump(v[1]*v[2]);
			return 0;
		}
		if(a[i]==a[i+1]){
			v.push_back(a[i]);
			i+=2;
		}else{
			i++;
		}
	}
	dumo(0);
	system("pause");
}
 

Compiler output:
a.cc: In function 'int main()':
a.cc:58:16: error: request for member 'rbegin' in 'a', which is of non-class type 'int [n]'
   58 |         sort(a.rbegin(),a.rend());
      |                ^~~~~~
a.cc:58:27: error: request for member 'rend' in 'a', which is of non-class type 'int [n]'
   58 |         sort(a.rbegin(),a.rend());
      |                           ^~~~
Language: C++

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

int main() {
  int n; cin >> n;
  vector<int> v(n + 1);
  for (int i = 0; i < n; i++) {
    cin >> v.at(i);
  }
  sort(v.begin(), v.end(), greater<int>());
  int a = -1, b = -1;
  for (int i = 0; i < n; i++) {
    if (v.at(i) == v.at(i + 1) && a == -1) {
      a = v.at(i);
      i++;
      continue;
    }
    if (v.at(i) == v.at(i + 1) && a != -1) {
      b = v.at(i);
      break;
    }
  }
  if (a == -1 || b == -1) {
    cout << 0 << endl;
  } else {
    cout << a * b << endl;
  }


Compiler output:
a.cc: In function 'int main()':
a.cc:27:4: error: expected '}' at end of input
   27 |   }
      |    ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

int main(int argc, char const *argv[])
{
    long n,a,ans=1,flag=0;
    map<int,int> count;
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>a;
        count[a]++;
    }

    for(auto itr = mp.begin(); itr != mp.end(); ++itr) {
        if(itr->second>1){
            
            itr->second-=2;
            ans*=itr->first;
            flag++;
            if(flag==2){
                cout<<ans;
                break;
            }
        }
    }
    if(flag!=2) cout<<0;
}


Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:16:20: error: 'mp' was not declared in this scope
   16 |     for(auto itr = mp.begin(); itr != mp.end(); ++itr) {
      |                    ^~
Language: C++

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

int main() {
    int n;
    cin >> n;
    map<long long, int> mp;
    vector<long long> v;
    for(int i = 0; i < n; i++) {
        int a;
        cin >> a;
        mp[a]++;
        if(mp[a] >= 2) {
            v.push_back(a);
            mp[a] -= 2;
        }
    }
    sort(v.begin(), v.end(), greater<long long>() );

    if(v.size() > 0) cout << v[0] * v[1] << endl;
    else cout << 0 << endl;

    return 0;
}

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

#include<cstdio>
#include<algorithm>
int main(){
int n;
scanf("%d",&n);
long long int a[n]={};
for(int i=0;i<n;i++){
scanf("%lld",&a[i]);
std::sort(a,a+n);
long long int p=0;
long long int q=0;
int u=0;
for(int i=n-2;i>=0;i--){
if(a[i]==a[i+1]&&u==1){
q=a[i];
break;
}
if(a[i]==a[i+1]&&u==0){
p=a[i];
a[i]=0;
a[i+1]=0;
u++;
}
}
printf("%lld\n",p*q);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:2: error: expected '}' at end of input
   27 | }
      |  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

#include<cstdio>
#include<algorithm>
int main(){
int n;
scanf("%d",&n);
long long int a[n]={};
for(int i=0;i<n;i++){
scanf("%lld",&a[i]);
std::sort(a,a+n);
long long int p=0;
long long int q=0;
int u=0;
for(int i=n-2;i>=0;i--){
if(a[i]==a[i+1]&&u==1){
q=a[i];
break;
if(a[i]==a[i+1]&&u==0){
p=a[i];
a[i]=0;
a[i+1]=0;
u++;
}
printf("%lld\n",p*q);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:2: error: expected '}' at end of input
   25 | }
      |  ^
a.cc:13:24: note: to match this '{'
   13 | for(int i=n-2;i>=0;i--){
      |                        ^
a.cc:25:2: error: expected '}' at end of input
   25 | }
      |  ^
a.cc:7:21: note: to match this '{'
    7 | for(int i=0;i<n;i++){
      |                     ^
a.cc:25:2: error: expected '}' at end of input
   25 | }
      |  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: Java


import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long[] a = new long[n];
		for(int i = 0 ; i < n; i++) a[i] = sc.nextInt();
		Map<Long, Long> map = new HashMap<>();
		for(int i = 0 ; i < n ; i++) {
			if(map.containsKey(a[i])) {
				map.put(a[i], map.get(a[i]) + 1);
			} else {
				map.put(a[i], 1L);
			}
		}
		List<Entry<Long, Long>> entry = new ArrayList<>(map.entrySet());
		Collections.sort(entry, new Comparator<Entry<Integer, Integer>>() {
			public int compare(Entry<Integer, Integer> obj1, Entry<Integer, Integer> obj2) {
				if(obj1.getValue() >= 2 && obj2.getValue() >= 2) return obj2.getKey() - obj1.getKey();
				else return obj2.getValue() - obj1.getValue();
			}
		});
		if(entry.get(0).getValue() >= 4) {
			System.out.println(Math.max(entry.get(0).getKey() * entry.get(0).getKey(), entry.get(0).getKey() * entry.get(1).getKey()));
		} else if(entry.get(0).getValue() >= 2 && entry.get(1).getValue() >= 2) {
			System.out.println(entry.get(0).getKey() * entry.get(1).getKey());
		} else {
			System.out.println(0);
		}
	}
}

Compiler output:
Main.java:26: error: no suitable method found for sort(List<Entry<Long,Long>>,<anonymous Comparator<Entry<Integer,Integer>>>)
		Collections.sort(entry, new Comparator<Entry<Integer, Integer>>() {
		           ^
    method Collections.<T#1>sort(List<T#1>) is not applicable
      (cannot infer type-variable(s) T#1
        (actual and formal argument lists differ in length))
    method Collections.<T#2>sort(List<T#2>,Comparator<? super T#2>) is not applicable
      (inference variable T#2 has incompatible bounds
        equality constraints: Entry<Long,Long>
        upper bounds: Entry<Integer,Integer>,Object)
  where T#1,T#2 are type-variables:
    T#1 extends Comparable<? super T#1> declared in method <T#1>sort(List<T#1>)
    T#2 extends Object declared in method <T#2>sort(List<T#2>,Comparator<? super T#2>)
1 error
Language: Java

import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
  int N = sc.nextInt();
  long[] len = new long[1000000001];
  for(int i = 0;i < N;i++){
    long a = sc.nextLong();
    len[a]++;
  }
  long w = 0;
  long h = 0;
  int count = 0;
  out:
  for(long i = 1000000000;;i--){
    if(len[i] == 4 && count == 0){
      w = i;
      h = i;
      break;
    }
    else if(len[i] >= 2){
      if(count == 0){
        w = i;
        count++;
      }
      else if(count == 1){
        h = i;
        break out;
      }
    }
  }
  System.out.println(h*w);
}}
    


Compiler output:
Main.java:9: error: incompatible types: possible lossy conversion from long to int
    len[a]++;
        ^
Main.java:16: error: incompatible types: possible lossy conversion from long to int
    if(len[i] == 4 && count == 0){
           ^
Main.java:21: error: incompatible types: possible lossy conversion from long to int
    else if(len[i] >= 2){
                ^
3 errors
Language: Java

import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
  int N = sc.nextInt();
  long[] len = new long[1000000001];
  for(int i = 0;i < N;i++){
    long a = sc.nextLong();
    len[a]++;
  }
  long w = 0;
  long h = 0;
  int count = 0;
  out:
  for(long i = 1000000000;;i--){
    if(len[i] == 4 && count == 0){
      w = i;
      h = i;
      break;
    }
    else if(len[i] >= 2){
      if(count == 0){
        w == i;
        count++;
      }
      else if(count == 1){
        h == i;
        break out;
      }
    }
  }
  System.out.println(h*w);
}}
    

Compiler output:
Main.java:23: error: not a statement
        w == i;
          ^
Main.java:27: error: not a statement
        h == i;
          ^
2 errors
Language: Java

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class C_71 {

	public static void main(String[] args) {
		ArrayList<Long> nums = new ArrayList<Long>();
		Scanner sc 	   = new Scanner(System.in);
		long N = sc.nextInt();
		long height=0,width=0;
		for(int i=0;i<N;i++) 
		{
			long a = sc.nextInt();
			nums.add(a);
		}
		Collections.sort(nums);
		Collections.reverse(nums);
		
		for(int i=1;i<nums.size();i++) 
		{
			long a = nums.get(i-1);
			long b = nums.get( i );
			if(a==b) 
			{
				 if		(height == 0)  height	 =	a;
				 else if(height != 0) { width	 =	a; break; }
				 nums.remove(i);nums.remove(i-1);i--;
			}
		}
		 System.out.println(height * width);
		
	}

}


Compiler output:
Main.java:5: error: class C_71 is public, should be declared in a file named C_71.java
public class C_71 {
       ^
1 error
Language: C++

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

//while(x!=0){
            //sum+=x%10;
           // x/=10;
        //}
        //各桁の和

//s.find(w[i])==string::npos
//findの使い方

#define rep(i,n) for(long long int (i)=0;(i)<(int)(n);(i)++)
#define rrep(i,a,b) for(long long int i=(a);i<(b);i++)
#define rrrep(i,a,b) for(long long int i=(a);i>(b);i--)

long long int n,cnt=0,ans=0,a,b,c,cmp[100000],data[100000],m,h;

string s,w="abcdefghijklmnopqrstuvwxyz;

int main(void){
      cin >> s;
      rep(i,s.size()){
          if(s.find(w[i])==string::npos){
              cout << w[i] << endl;
              return 0;
          }
      }
      cout << "None" << endl;
return 0;
}


Compiler output:
a.cc:19:12: warning: missing terminating " character
   19 | string s,w="abcdefghijklmnopqrstuvwxyz;
      |            ^
a.cc:19:12: error: missing terminating " character
   19 | string s,w="abcdefghijklmnopqrstuvwxyz;
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:21:1: error: expected primary-expression before 'int'
   21 | int main(void){
      | ^~~
a.cc:31:2: error: expected ',' or ';' at end of input
   31 | }
      |  ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
long long n, m, s, a[100000];
int main() {
	int i;

	scanf("%lld", &n);
	for(i=0; i<n; i++) scanf("%lld", &a[i]);

　	sort(a, a+n);

　	for(i=n-1; i; i--) {
		if(a[i]==a[i-1]) {
			if(m==0) m = a[i];
			else {s = m*a[i]; break;}
			i--;
		}
	}

	printf("%lld", s);

	return 0;
}

Compiler output:
a.cc:10:1: error: extended character 　 is not valid in an identifier
   10 | 　      sort(a, a+n);
      | ^
a.cc:12:1: error: extended character 　 is not valid in an identifier
   12 | 　      for(i=n-1; i; i--) {
      | ^
a.cc: In function 'int main()':
a.cc:10:1: error: '\U00003000' was not declared in this scope
   10 | 　      sort(a, a+n);
      | ^~
a.cc:12:8: error: expected ';' before 'for'
   12 | 　      for(i=n-1; i; i--) {
      |   ^~~~~~~~~
      |        ;
a.cc:12:26: error: expected ';' before ')' token
   12 | 　      for(i=n-1; i; i--) {
      |                          ^
      |                          ;
Language: C++

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

int main() {

    int n;
    vector< int > a;
    map< int, int > used;
    cin >> n;
    a.resize(n);
    for(int i = 0; i < n; i++) {
        cin >> a[i]; used[a[i]]++;
    }
    sort(a.begin(), a.end(), greater< int >());
    a.erase(unique(a.begin(), a.end()), a.end());

    int prev = 0, cnt = 0;
    for(int i = 0; i < a.size(); i++) {
        if(!cnt) prev = a[i];
        if(used[a[i]] / 2) {
            cnt += used[a[i]] / 2;
            if(cnt >= 2) {
                cout << prev * a[i] << endl;
                exit(0);
            }
        }
    }
    cout << 0 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   16 |     sort(a.begin(), a.end(), greater< int >());
      |     ^~~~
      |     short
a.cc:17:13: error: 'unique' was not declared in this scope
   17 |     a.erase(unique(a.begin(), a.end()), a.end());
      |             ^~~~~~
Language: C++

#include <algorithm>
#include <iostream>
#include <stdint.h>
#include <vector>
 
using namespace std;
 
int32_t main()
{
  uint32_t N;
  cin >> N;
 
  vector<uint64_t> lines;
  for (uint32_t _ = 0; _ < N; _++) {
    uint64_t line;
    cin >> line;
    lines.push_back(line);
  }
 
  sort(lines.begin(), lines.end());
 
  uint64_t width_found = false;
  uint64_t width = 0;
  uint64_t height = 0;
 
  while (!lines.empty()) {
    uint64_t line = lines.back();
    if (!width_found) {
      if (width == line) {
        width_found = true;
      } else {
        width = line;
      }
    } else {
      if (height == line) {
        break;
      } else {
        height = line;
      }
    }
    lines.pop_back();
  }
 
  cout << width * height << endl;
 
  return 0;


Compiler output:
a.cc: In function 'int32_t main()':
a.cc:46:12: error: expected '}' at end of input
   46 |   return 0;
      |            ^
a.cc:9:1: note: to match this '{'
    9 | {
      | ^
Language: C++

#include<iostream>
#include<algorithm>
#include<functional>
using namespace std;
 
int main()
{
int N, A[100000], w[2] = [0, 0], cnt = 0;
cin >> N;
for(int i = 0; i < N; i++) cin >>A[i];
sort(A, A+N, greater<int>());
 
for(int i = 0; i < N-1 && cnt < 2; i++){
for(int j = i+1; j < N && cnt < 2; j++){
if(A[i] == A[j]){
w[cnt] = A[i];
cnt += 1;
i = j + 1;
j = i;
}
}
}
 
cout << w[0] * w[1] << endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:27: error: expected identifier before numeric constant
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                           ^
a.cc:8:28: error: expected ']' before ',' token
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                            ^
      |                            ]
a.cc: In lambda function:
a.cc:8:28: error: expected '{' before ',' token
a.cc: In function 'int main()':
a.cc:8:26: error: array must be initialized with a brace-enclosed initializer
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                          ^~
a.cc:8:30: error: expected unqualified-id before numeric constant
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                              ^
a.cc:13:27: error: 'cnt' was not declared in this scope; did you mean 'int'?
   13 | for(int i = 0; i < N-1 && cnt < 2; i++){
      |                           ^~~
      |                           int
Language: C++

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

int main()
{
int N, A[100000], w[2] = [0, 0], cnt = 0;
cin >> N:
for(int i = 0; i < N; i++) cin >>A[i];
sort(A, A+N, greater<int>());

for(int i = 0; i < N-1 && cnt < 2; i++){
for(int j = i+1; j < N && cnt < 2; j++){
if(A[i] == A[j]){
w[cnt] = A[i];
cnt += 1;
i = j + 1;
j = i;
}
}
}

cout << w[0] * w[1] << endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:27: error: expected identifier before numeric constant
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                           ^
a.cc:8:28: error: expected ']' before ',' token
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                            ^
      |                            ]
a.cc: In lambda function:
a.cc:8:28: error: expected '{' before ',' token
a.cc: In function 'int main()':
a.cc:8:26: error: array must be initialized with a brace-enclosed initializer
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                          ^~
a.cc:8:30: error: expected unqualified-id before numeric constant
    8 | int N, A[100000], w[2] = [0, 0], cnt = 0;
      |                              ^
a.cc:9:9: error: expected ';' before ':' token
    9 | cin >> N:
      |         ^
      |         ;
a.cc:10:16: error: 'i' was not declared in this scope
   10 | for(int i = 0; i < N; i++) cin >>A[i];
      |                ^
a.cc:13:27: error: 'cnt' was not declared in this scope; did you mean 'int'?
   13 | for(int i = 0; i < N-1 && cnt < 2; i++){
      |                           ^~~
      |                           int
Language: Java

import java.util.*;
 
public class Main {
    public static void  main (String[] args) {
        Scanner sc = new Scanner(System.in);
        
        int str = sc.nextInt();
        
        List<Integer> all = new ArrayList<Integer>();
        List<Integer> db = new ArrayList<Integer>();
        for (int i = 0; i < str; i++) {
            int lg = sc.nextInt();
            if (all.contains(lg)) {
                all.remove((Integer)lg);
                db.add(lg);
            } else {
                all.add((lg));
            }
        }
        
        if (db.size() < 2) {
            System.out.println(0);
        } else {
            Collections.sort(db);
            Collections.reverse(db);
            System.out.println((Long)(db.get(0) * db.get(1)));
        }
    }
}

Compiler output:
Main.java:26: error: incompatible types: int cannot be converted to Long
            System.out.println((Long)(db.get(0) * db.get(1)));
                                     ^
1 error
Language: C++

#include<iostream>
#include<algorithm>
#include<functional>

int main()
{
int N,  A[100000], w[2] = {0, 0}, cnt = 0;

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

sort(A, A + N, greater<int>());

for(int i = 0; i < N - 1 && cnt < 2; i++){
for(int j = 0; j < N && cnt < 2; j++){
if(A[i] == A[j]){
w[cnt] = A[i];
cnt +=1;
i=j+1;
j=i;
}
}
}

cout << w[0] * w[1] << endl;

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    9 | cin >> N;
      | ^~~
      | 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
      |                  ^~~
a.cc:12:16: error: 'greater' was not declared in this scope; did you mean 'std::greater'?
   12 | sort(A, A + N, greater<int>());
      |                ^~~~~~~
      |                std::greater
In file included from /usr/include/c++/14/string:49,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/bits/stl_function.h:353:12: note: 'std::greater' declared here
  353 |     struct greater;
      |            ^~~~~~~
a.cc:12:24: error: expected primary-expression before 'int'
   12 | sort(A, A + N, greater<int>());
      |                        ^~~
a.cc:12:1: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
   12 | sort(A, A + N, greater<int>());
      | ^~~~
      | std::sort
In file included from /usr/include/c++/14/algorithm:86,
                 from a.cc:2:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note: 'std::sort' declared here
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
a.cc:25:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   25 | cout << w[0] * w[1] << 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:25:24: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   25 | cout << w[0] * w[1] << 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;

void Sort(int x[ ], int n)
{
    int i, j, temp;

    for (i = 0; i < n - 1; i++) {
        for (j = n - 1; j > i; j--) {
            if (x[j - 1] > x[j]) {  /* 前の要素の方が大きかったら */
                temp = x[j];        /* 交換する */
                x[j] = x[j - 1];
                x[j - 1]= temp;
            }
        }	
    }
}

int main() {
	int a;
	cin >> a;
	int b[a];
	for (int i = 0;i < a;i++) {
		cin >> b[i];
	}
	Sort(b,a);
	int c = 0;
	int co = 0;
	int ans = 1;
	for (int i = a - 1;i => 0;i--) {
		if (co == 2) {
			break;
		}
		if (c != b[i]) {
			c = b[i];
		}
		else {
			ans *= b[i];
			co++;
		}
	}
	cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:31:31: error: expected primary-expression before '>' token
   31 |         for (int i = a - 1;i => 0;i--) {
      |                               ^
Language: C++

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <array>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <bitset>
using namespace std;
typedef long long ll;
typedef unsigned long long int ull;
#define rep(i,a,n) for(ll i = (a);i < (n);i++)
#define per(i,a,n) for(ll i = (a);i > (n);i--)
#define lep(i,a,n) for(ll i = (a);i <= (n);i++)
#define pel(i,a,n) for(ll i = (a);i >= (n);i--)
#define all(v) (v).begin(),(v).end()
#define clr(a,b) memset((a),(b),sizeof(a))
#define sz size()
#define pb push_back
#define print(x) cout << x << endl
array<ll,1000000000> ar = {};
vector<ll> vec;

int main(){
  ll a = 0,b = 0;
  ll n,m;
  cin >> n;
  rep(i,0,n){
    cin >> m;
    ar[m]++;
    if(m > a)a = m;
    if(m < b)b = m;
  }
  pel(i,a,b){
    if(ar[i] >= 4){
      print(i*i);
      return 0;
    }else if(ar[i] == 2 || ar[i] == 3){
      vec.pb(i);
    }
    //
    if(vec.sz == 2){
      print(vec[0]*vec[1]);
      return 0;
    }
  }
  print("0");
  return 0;
}


Compiler output:
/tmp/ccdwLpzN.o: in function `main':
a.cc:(.text+0x165): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccdwLpzN.o
a.cc:(.text+0x174): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccdwLpzN.o
a.cc:(.text+0x193): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccdwLpzN.o
a.cc:(.text+0x1aa): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccdwLpzN.o
/tmp/ccdwLpzN.o: in function `__static_initialization_and_destruction_0()':
a.cc:(.text+0x23f): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccdwLpzN.o
a.cc:(.text+0x258): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccdwLpzN.o
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <array>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <bitset>
using namespace std;
typedef long long ll;
typedef unsigned long long int ull;
#define rep(i,a,n) for(ll i = (a);i < (n);i++)
#define per(i,a,n) for(ll i = (a);i > (n);i--)
#define lep(i,a,n) for(ll i = (a);i <= (n);i++)
#define pel(i,a,n) for(ll i = (a);i >= (n);i--)
#define all(v) (v).begin(),(v).end()
#define clr(a,b) memset((a),(b),sizeof(a))
#define sz size()
#define pb push_back
#define print(x) cout << x << endl
array<ll,1000000000> ar = {};
vector<int> vec;

int main(){
  int a = 0,b = 0;
  int n,m;
  cin >> n;
  rep(i,0,n){
    cin >> m;
    ar[m]++;
    if(m > a)a = m;
    if(m < b)b = m;
  }
  pel(i,a,b){
    if(ar[i] >= 4){
      print(i*i);
      return 0;
    }else if(ar[i] == 2 || ar[i] == 3){
      vec.pb(i);
    }
    //
    if(vec.sz == 2){
      print(vec[0]*vec[1]);
      return 0;
    }
  }
  print("0");
  return 0;
}


Compiler output:
/tmp/ccp27QFe.o: in function `main':
a.cc:(.text+0x161): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccp27QFe.o
a.cc:(.text+0x170): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccp27QFe.o
a.cc:(.text+0x18f): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccp27QFe.o
a.cc:(.text+0x1a5): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccp27QFe.o
/tmp/ccp27QFe.o: in function `__static_initialization_and_destruction_0()':
a.cc:(.text+0x231): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccp27QFe.o
a.cc:(.text+0x24a): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccp27QFe.o
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <array>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <bitset>
using namespace std;
typedef long long ll;
typedef unsigned long long int ull;
#define rep(i,a,n) for(ll i = (a);i < (n);i++)
#define per(i,a,n) for(ll i = (a);i > (n);i--)
#define lep(i,a,n) for(ll i = (a);i <= (n);i++)
#define pel(i,a,n) for(ll i = (a);i >= (n);i--)
#define all(v) (v).begin(),(v).end()
#define clr(a,b) memset((a),(b),sizeof(a))
#define sz size()
#define pb push_back
#define print(x) cout << x << endl
int n,m;
int ans = 0;
array<int,1000000000> ar = {};
vector<int> vec;

int main(){
  int a = 0,b = 0;
  cin >> n;
  rep(i,0,n){
    cin >> m;
    ar[m]++;
    if(m > a)a = m;
    if(m < b)b = m;
  }
  per(i,a,b){
    if(ar[i] >= 4){
      print(i*i);
      return 0;
    }else if(ar[i] == 2 || ar[i] == 3){
      vec.pb(i);
    }
    //
    if(vec.sz == 2){
      print(vec[0]*vec[1]);
      return 0;
    }
  }
  print("0");
  return 0;
}


Compiler output:
/tmp/ccWGrfct.o: in function `main':
a.cc:(.text+0x170): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccWGrfct.o
a.cc:(.text+0x17f): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccWGrfct.o
a.cc:(.text+0x19e): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccWGrfct.o
a.cc:(.text+0x1b4): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccWGrfct.o
/tmp/ccWGrfct.o: in function `__static_initialization_and_destruction_0()':
a.cc:(.text+0x240): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccWGrfct.o
a.cc:(.text+0x259): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccWGrfct.o
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <array>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <bitset>
using namespace std;
typedef long long ll;
typedef unsigned long long int ull;
#define rep(i,a,n) for(ll i = (a);i < (n);i++)
#define per(i,a,n) for(ll i = (a);i > (n);i--)
#define lep(i,a,n) for(ll i = (a);i <= (n);i++)
#define pel(i,a,n) for(ll i = (a);i >= (n);i--)
#define all(v) (v).begin(),(v).end()
#define clr(a,b) memset((a),(b),sizeof(a))
#define sz size()
#define pb push_back
#define print(x) cout << x << endl
int n,m;
int ans = 0;
array<int,1000000000> ar = {};
vector<int> vec;

int main(){
  int a = 0,b = 0;
  cin >> n;
  rep(i,0,n){
    cin >> m;
    ar[m]++;
    if(m > a)a = m;
    if(m < b)b = m;
  }
  pel(i,a,b){
    if(ar[i] >= 4){
      print(i*i);
      return 0;
    }else if(ar[i] == 2 || ar[i] == 3){
      vec.pb(i);
    }
    //
    if(vec.sz == 2){
      print(vec[0]*vec[1]);
      return 0;
    }
  }
  print("0");
  return 0;
}


Compiler output:
/tmp/ccH12noS.o: in function `main':
a.cc:(.text+0x170): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccH12noS.o
a.cc:(.text+0x17f): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccH12noS.o
a.cc:(.text+0x19e): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccH12noS.o
a.cc:(.text+0x1b4): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccH12noS.o
/tmp/ccH12noS.o: in function `__static_initialization_and_destruction_0()':
a.cc:(.text+0x240): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccH12noS.o
a.cc:(.text+0x259): relocation truncated to fit: R_X86_64_PC32 against symbol `vec' defined in .bss section in /tmp/ccH12noS.o
collect2: error: ld returned 1 exit status
Language: C++

#include<iostream>
using namespace std;

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

    int bars[100000] = {0};

    int i;
    for (i = 0; i < N; i++) {
        int c;
        cin >> c;
        bars[i] = c;
    }
    sort(begin(bars), end(bars));

    int first = -1;
    int second = -1;
    int s = N - 1;

    for (i = 0; i < N - 1; i++) {
      if (bars[s-i] == bars[s-i-1]) {
          if (first == -1) {
              first = bars[s-i];
              i++;
          } else {
              second = bars[s-i];
            break;
          }
      }
    }

    cout << first * second << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |     sort(begin(bars), end(bars));
      |     ^~~~
      |     short
Language: C++

#include <stdio.h>
#include <vector>
#include<iostream>
#include<queue>
#include<map>
using namespace std;

int main() {

 int n;
 vector< int > arr;
 vector < pair < int , int > > vct;
 map < int , int > mp;
 map < int , int > :: iterator it;
 scanf ("%d" , &n);
 arr.resize(n);

 for ( int i = 0 ; i < n ; ++i){
	  scanf ("%d" , &arr[i]);
	  mp [arr[i]]++;
   }

 for ( it = mp.begin() ; it != mp.end() ; ++it)
	   vct.push_back ( make_pair ( it->first, it -> second ));

 reverse ( vct.begin() , vct.end());

   int t = 0 ;
   long long ans1 = 0 , ans2 = 0;
   while ( t < vct.size()  ){
	   if ( vct[t].second >= 2){
		   vct[t].second -= 2;
		   ans1 = vct[t].first;
		   break;
	   }
	   t++;
   }

   for ( int i = t ; i < vct.size() ; ++i)
	   if ( vct[i].second >= 2){
		   ans2 = vct[i].first;
		   break;
	   }

   printf ("%lld\n" , ans1 * ans2);

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:2: error: 'reverse' was not declared in this scope
   26 |  reverse ( vct.begin() , vct.end());
      |  ^~~~~~~
Language: C++

#include <stdio.h>
#include <vector>
#include<iostream>
#include<queue>
#include<map>
using namespace std;

int main() {

 int n;
 vector< int > arr;
 vector < pair < int , int > > vct;
 map < int , int > mp;
 map < int , int > :: iterator it;
 scanf ("%d" , &n);
 arr.resize(n);

 for ( int i = 0 ; i < n ; ++i){
	  scanf ("%d" , &arr[i]);
	  mp [arr[i]]++;
   }

 for ( it = mp.begin() ; it != mp.end() ; ++it)
	   vct.push_back ( make_pair ( it->first, it -> second ));

 reverse ( vct.begin() , vct.end());

   int t = 0 ;
   long long ans1 = 0 , ans2 = 0;
   while ( t < vct.size()  ){
	   if ( vct[t].second >= 2){
		   ans1 = vct[t].first;
		   break;
	   }
	   t++;
   }

   for ( int i = t + 1; i < vct.size() ; ++i)
	   if ( vct[i].second >= 2){
		   ans2 = vct[i].first;
		   break;
	   }

   printf ("%lld\n" , ans1 * ans2);

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:2: error: 'reverse' was not declared in this scope
   26 |  reverse ( vct.begin() , vct.end());
      |  ^~~~~~~
Language: C++

#include<iostream>

using namespace std;

int main() {
	int n,a[100000];
	cin >> n;
	for (int i = 0; i < n; i++)cin >> a[i];
	sort(a, a + n,greater<int>());
	int j = 0,x=0,y=0;
	while (!(x > 0 && y > 0) && j < n) {
		if (a[j] == a[j + 1]) {
			if (x == 0)x = a[j];
			else if (y == 0) {
				y = a[j];
				break;
			}
			j += 2;
		}
		else j++;
	}
	cout << x*y << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'sort' was not declared in this scope; did you mean 'short'?
    9 |         sort(a, a + n,greater<int>());
      |         ^~~~
      |         short
Language: C

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

int comp(const void *a, const void *b){
    return *(long int *)b - *(long int *)a;
}

int main(void){
    long int N;
    long int A[100000];
    int i, j;
    int flag;
    int tmp;
    long int a, b;
    a = 0;
    b = 0;

    scanf("%ld", &N);
    for (i = 0; i < N; i++){
        scanf("%ld", &A[i]);
    }

    for (i = 0; i < N; i++){
        flag = 0;
        for (j = N - 1; j > 0; j--){
            if (A[j] > A[j - 1]){
                tmp = A[j];
                A[j] = A[j - 1];
                A[j - 1] = tmp;
                flag = 1
            }
        }
        if (flag == 0){
            break;
        }
    }

    flag = 0;

    for (i = 0; i < N; i++){
        if (A[i] == A[i + 1] && flag == 0){
            a = A[i];
            i++;
            flag = 1;
        }else if (A[i] == A[i + 1] && flag == 1){
            b = A[i];
            break;
        }
    }

    printf("%ld\n", a * b);
    
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:30:25: error: expected ';' before '}' token
   30 |                 flag = 1
      |                         ^
      |                         ;
   31 |             }
      |             ~
Language: C

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

int comp(const void *a, const void *b){
    return *(long int *)b - *(long int *)a;
}

int main(void){
    long int N;
    long int A[100000];
    int i, j;
    int flag;
    int tmp;
    long int a, b;
    a = 0;
    b = 0;

    scanf("%ld", &N);
    for (i = 0; i < N; i++){
        scanf("%ld", &A[i]);
    }

    for (i = 0; i < N; i++){
        flag = 0
        for (j = N - 1; j > 0; j--){
            if (A[j] > A[j - 1]){
                tmp = A[j];
                A[j] = A[j - 1];
                A[j - 1] = tmp;
                flag = 1
            }
        }
        if (flag == 0){
            break;
        }
    }

    flag = 0;

    for (i = 0; i < N; i++){
        if (A[i] == A[i + 1] && flag == 0){
            a = A[i];
            i++;
            flag = 1;
        }else if (A[i] == A[i + 1] && flag == 1){
            b = A[i];
            break;
        }
    }

    printf("%ld\n", a * b);
    
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:24:17: error: expected ';' before 'for'
   24 |         flag = 0
      |                 ^
      |                 ;
   25 |         for (j = N - 1; j > 0; j--){
      |         ~~~
Language: C++

#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main(){
    int n, num, count_num, select = -1;
    vector<int> stick;
    cin >> n;
    stick.resize(n);
    for(vector<int>::iterator itr = stick.begin(); itr < stick.end(); itr++)
        cin >> *itr;
    sort(stick.begin(), stick.end());
    for(vector<int>::iterator itr = stick.end() - 1; itr >= stick.begin();){
        num = *itr;
        count_num = 0;
        while(itr >= stick.begin() && *itr == num){
            count_num++;
            itr--;
        }
        if(count_num < 2)
            continue;
        else if(count_num < 4){
            if(select < 1){
                select = num;
                continue;
            }else{
                cout << select * num  << endl;
                return 0;
            }
        }else{
            if(select < 1){
                cout << select * select << endl;
                return 0;
            }else{
                cout << select * num  << endl;
                return 0;
            }
        }
    }
    cout << 0 << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   14 |     sort(stick.begin(), stick.end());
      |     ^~~~
      |     short
Language: C++

#include <iostream>
using namespace std;

int N;
int arr[1000000000];
int input;
int highest;
int highest2;

int main()
{
	cin >> N;
	for(int i = 0 ; i <= N - 1 ; i ++)
	{
		cin >> input;
		arr[input - 1] ++;
	}
	for(int i = 99999999 ; i >= 0 ; i --)
	{
		if(highest == 0)
		{
			if(arr[i] > 1)
			{
				if(arr[i] >= 4)
				{
					cout << (i + 1)* (i + 1);
					break;
				}
				else
				{
					highest = i;
				}
			}
		}
		else
		{
			if(arr[i] > 1)
			{
				cout << (highest + 1) * (i + 1) << endl;
				break;
			}
		}
	}
	return 0;
}


Compiler output:
/tmp/cc93z5M2.o: in function `main':
a.cc:(.text+0x2d): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/cc93z5M2.o
a.cc:(.text+0x45): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/cc93z5M2.o
a.cc:(.text+0x95): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/cc93z5M2.o
a.cc:(.text+0x100): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/cc93z5M2.o
a.cc:(.text+0x124): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/cc93z5M2.o
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream>
using namespace std;

int N;
int arr[1000000000];
int input;
int highest;
int highest2;

int main()
{
	cin >> N;
	for(int i = 0 ; i <= N - 1 ; i ++)
	{
		cin >> input;
		arr[input - 1] ++;
	}
	for(int i = 99999999 ; i >= 0 ; i --)
	{
		if(highest == 0)
		{
			if(arr[i] > 1)
			{
				if(arr[i] >= 4)
				{
					cout << (i + 1)* (i + 1);
					break;
				}
				else
				{
					highest = i;
				}
			}
		}
		else
		{
			if(arr[i] > 1)
			{
				cout << (highest + 1) * (i + 1) << endl;
				break;
			}
		}
	}
	return 0;
}


Compiler output:
/tmp/cctQlZIe.o: in function `main':
a.cc:(.text+0x2d): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/cctQlZIe.o
a.cc:(.text+0x45): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/cctQlZIe.o
a.cc:(.text+0x95): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/cctQlZIe.o
a.cc:(.text+0x100): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/cctQlZIe.o
a.cc:(.text+0x124): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/cctQlZIe.o
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream>
using namespace std;

int N;
int arr[1000000005];
int input;
int highest;
int highest2;

int main()
{
	cin >> N;
	for(int i = 0 ; i <= N - 1 ; i ++)
	{
		cin >> input;
		arr[input - 1] ++;
	}
	for(int i = 99999999 ; i >= 0 ; i --)
	{
		if(highest == 0)
		{
			if(arr[i] > 1)
			{
				if(arr[i] >= 4)
				{
					cout << (i + 1)* (i + 1);
					break;
				}
				else
				{
					highest = i;
				}
			}
		}
		else
		{
			if(arr[i] > 1)
			{
				cout << (highest + 1) * (i + 1) << endl;
				break;
			}
		}
	}
	return 0;
}


Compiler output:
/tmp/ccLrymXK.o: in function `main':
a.cc:(.text+0x2d): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/ccLrymXK.o
a.cc:(.text+0x45): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/ccLrymXK.o
a.cc:(.text+0x95): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/ccLrymXK.o
a.cc:(.text+0x100): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/ccLrymXK.o
a.cc:(.text+0x124): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/ccLrymXK.o
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream>
using namespace std;

int N;
int arr[1000000005];
int input;
int highest;
int highest2;

int main()
{
	cin >> N;
	for(int i = 0 ; i <= N - 1 ; i ++)
	{
		cin >> input;
		arr[input - 1] ++;
	}
	for(int i = 99999999 ; i >= 0 ; i --)
	{
		if(highest == 0)
		{
			if(arr[i] > 1)
			{
				if(arr[i] >= 4)
				{
					cout << (i + 1)* (i + 1);
					break;
				}
				else
				{
					highest = i;
				}
			}
		}
		else
		{
			if(arr[i] > 1)
			{
				cout << (highest + 1) * (i + 1) << endl;
				break;
			}
		}
	}
	return 0;
}


Compiler output:
/tmp/ccADVbyn.o: in function `main':
a.cc:(.text+0x2d): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/ccADVbyn.o
a.cc:(.text+0x45): relocation truncated to fit: R_X86_64_PC32 against symbol `input' defined in .bss section in /tmp/ccADVbyn.o
a.cc:(.text+0x95): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/ccADVbyn.o
a.cc:(.text+0x100): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/ccADVbyn.o
a.cc:(.text+0x124): relocation truncated to fit: R_X86_64_PC32 against symbol `highest' defined in .bss section in /tmp/ccADVbyn.o
collect2: error: ld returned 1 exit status