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

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
using namespace std;
int main(){
    int n;
    cin >> n;
    vector<long long> a(n);
    for(int i=0;i<n;i++){
        cin >> a[i];
    }
    int ans=0;
    int count=1;
    sort(a.begin(),a.end());
    for(int i=1;i<n;i++){
        if(a[i]==a[i-1]){
            count++;
        }else{
            if(count%2!=0){
                ans++;
            }
            count=1;
        }
    }
    if(n==1){
        ans = 1;
    }
    cout << ans << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:29:25: error: expected '}' at end of input
   29 |     cout << ans << endl;
      |                         ^
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main() {
	int N, A[1000000010],B[1000000010];
	for (int i = 0; i < 1000000010; i++) {
		B[i] = 0;
	}
	cin >> N;
	for (int i = 0; i < 1000000010; i++) {
		cin >> A[i];
	}
	for (int i = 0; i < 1000000010; i++) {
		if (B[A[i]] == 0) {
			B[A[i]] = 1;
		}
		else {
			B[A[i]]=0
		}
	}
	int ans=0;
	for (int i = 0; i < 1000000010; i++) {
		if (B[i] == 1) {
			ans++;
		}
	}
	cout << ans << endl;
	return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:34: error: expected ';' before '}' token
   17 |                         B[A[i]]=0
      |                                  ^
      |                                  ;
   18 |                 }
      |                 ~
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  box = new long(1000000000);
     int count = 0;
     for (int i = 0 ; i < n; i ++) {
        box[sc.nextLong()]++;
        if(box[sc.nextLong()] % 2 != 0) {
           count++;
        } else {
           count--;
        }
     }
     System.out.println(count);
  }
}

Compiler output:
Main.java:7: error: '[' expected
     long  box = new long(1000000000);
                         ^
Main.java:7: error: ']' expected
     long  box = new long(1000000000);
                                     ^
2 errors
Language: C++

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

int main(){
  int ans=0,n,A[100000],array[1000000001]={};
  cin>>n;
  for(int i=0;i<n;i++){
    cin>>A[i];
  }
  for(int i=0;i<n;i++){
    if(array[A[i]]%2==0){
      ans++;
      array[A[i]]++;
    }else{
      ans--;
      array[A[i]]--;
    }
  }
  cout<<ans<<endl;
}

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

#include <iostream>
#include <vector>
#include <queue>
#include <cmath>
#include <bitset>

#define rep(i, N) for(int (i) = 0; (i) < (N); (i) ++)
typedef long long ll;
using namespace std;

int main(){
    int N;
    cin >> N;
    vector<int>  as(N, 0);
    rep(i, N){
        cin >> as[i];
    }
    sort(as.begin(), as.end());
    int ans = 0;
    for(int i = 0; i < N;){
        int j = i;
        int tmp = 0;
        for(; j < N && as[j] == as[i]; j++){
            tmp ++;
        }
        ans += tmp % 2;
        i = j;
    }
    cout << ans << endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   18 |     sort(as.begin(), as.end());
      |     ^~~~
      |     sqrt
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  int n,i,ans=1,ans1=0;
  cin>>n;
  for(i=1;i<=n;i++)
    cin>>a[i];
  sort(a+1,a+n+1);
  for(i=2;i<=n;i++)
    {
      if(a[i]==a[i-1])
	    ans=(ans+1)%2;
      else
	  {
	    ans1+=ans;
		ans=1;	
	  }
    }
  if(ans%2!=0)
    ans1++;
  cout<<ans1<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: 'a' was not declared in this scope
    8 |     cin>>a[i];
      |          ^
a.cc:9:8: error: 'a' was not declared in this scope
    9 |   sort(a+1,a+n+1);
      |        ^
Language: C++

#include<iostream>
#include<algorithm>
#include<math.h>
#include<cstdio>
#include<ctype.h>
#include<stdio.h>
#include<set>
#include<vector>
#include<map>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<numeric>
#include<string>
typedef long long ll;
using namespace std;

ll gcd(ll a, ll b) {
	if (a<b) { return gcd(b, a); }
	else if (a%b) { return gcd(b, a%b); }
	else { return b; }
}
int main() {
	ll N;
	ll ans = 0;
	ll cnt = 1;
	cin >> N;
	ll a[N + 100];
	for (ll i = 0; i < N; i++) {
		cin >> a[i];
	}
	sort(a, a + N);
	a[N] = 0;
	for (ll i = 0; i < N-1; i++) {
		if (a[i] == a[i + 1])cnt++;
		else if (cnt % 2 == 1)
			ans++;
			cnt = 1;
		}
	}
	cout << ans << endl;





Compiler output:
a.cc:43:9: error: 'cout' does not name a type
   43 |         cout << ans << endl;
      |         ^~~~
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#include<set>
#include<utility>
using namespace std;
typedef long long ll;
#define rep(i,a,n)	for(int i=a;i<n;i++)
#define rrep(i,a,n) for(int i=(a-1);i>=n;i--)

ll gcd(ll a,ll b){
	if(b==0)return a;
	return gcd(b,a%b);
}
ll lcm(ll a,ll b){
	ll g=gcd(a,b);
	return a/g*b;
}
int main(){
	int n;
	cin>>n;
	ll a[100010];
	rep(i,0,n){
		cin>>a[i];
	}
	sort(a,a+n);
	ll ans=0;
	ll cnt=1;
	rep(i,0,n){
		if(a[i]==a[i-1])cnt++;
		else{
			ans+=(cnt%2);
			cnt=1;
		}
	}
	ans+=cnt%2
	cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:38:19: error: expected ';' before 'cout'
   38 |         ans+=cnt%2
      |                   ^
      |                   ;
   39 |         cout<<ans<<endl;
      |         ~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

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

  map<int, int> a;
  rep(i,n) {
    int s;
    cin >> s;
    a[s]++;
  }

  int ans = 0;
  for (auto i : a) {
    ans += i.second % 2;
  }

  cout << ans << endl;

  return 0;
}


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

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

typedef long long ll;

int main()
{
    int n, ans;
    cin >> n;
    map<int, int> a;
    rep(i, n)
    {
        int s;
        cin >> s;
        if(a[s]>0)
            a[s]++;
        else a[s]=0;
    }
    for (auto i : a)
    {
        if (i->second % 2 == 1)
            ans++;
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:14: error: base operand of '->' has non-pointer type 'std::pair<const int, int>'
   23 |         if (i->second % 2 == 1)
      |              ^~
Language: C++

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

typedef long long ll;

int main()
{
    int n, ans;
    cin >> n;
    map<int, int> a;
    rep(i, n)
    {
        int s;
        cin >> s;
        a[s]++;
    }
    for (auto i : a)
    {
        if (i->second % 2 == 1)
            ans++;
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:14: error: base operand of '->' has non-pointer type 'std::pair<const int, int>'
   21 |         if (i->second % 2 == 1)
      |              ^~
Language: C++

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

typedef long long ll;

int main()
{
    int n,ans;
    cin >> n;
    map<int,int> a;
    rep(i, n) {
        int s;
        a[s]++;
    }
    for (auto i = a.begin(); i!= a.end();i++){
        int s = i->second();
        if(s%2==1)
            ans++;
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:26: error: expression cannot be used as a function
   18 |         int s = i->second();
      |                 ~~~~~~~~~^~
Language: C++

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

typedef long long ll;

int main()
{
    int n,ans;
    cin >> n;
    map<int,int> a;
    rep(i, n) {
        int s;
        a[s]++;
    }
    for (auto i = a.begin(); i!= a.end();i++){
        if(a[i]%2==1)
            ans++;
    }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:13: error: no match for 'operator[]' (operand types are 'std::map<int, int>' and 'std::_Rb_tree_iterator<std::pair<const int, int> >')
   18 |         if(a[i]%2==1)
      |             ^
In file included from /usr/include/c++/14/map:63,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:152,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_map.h:504:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](const key_type&) [with _Key = int; _Tp = int; _Compare = std::less<int>; _Alloc = std::allocator<std::pair<const int, int> >; mapped_type = int; key_type = int]'
  504 |       operator[](const key_type& __k)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_map.h:504:34: note:   no known conversion for argument 1 from 'std::_Rb_tree_iterator<std::pair<const int, int> >' to 'const std::map<int, int>::key_type&' {aka 'const int&'}
  504 |       operator[](const key_type& __k)
      |                  ~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_map.h:524:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](key_type&&) [with _Key = int; _Tp = int; _Compare = std::less<int>; _Alloc = std::allocator<std::pair<const int, int> >; mapped_type = int; key_type = int]'
  524 |       operator[](key_type&& __k)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_map.h:524:29: note:   no known conversion for argument 1 from 'std::_Rb_tree_iterator<std::pair<const int, int> >' to 'std::map<int, int>::key_type&&' {aka 'int&&'}
  524 |       operator[](key_type&& __k)
      |                  ~~~~~~~~~~~^~~
Language: C++

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main() {
	int count = 0, tmp = 0, index = 0, arrcount = 0;
	scanf_s("%d", &count);
	for (int i = 0; i < count; i++) {
		scanf_s("%d", &arrcount);
		int *arr = (int*)malloc(sizeof(int) * arrcount);
		memset(arr, 0, arrcount * sizeof(int));
		for (int j = 0; j < arrcount; j++) {
			scanf_s("%d", &tmp);

			for (int k = 0; k <= j; k++) {
				if (arr[k] == tmp) {
					index--;
					break;
				}
				else if (k == j) {
					arr[index] = tmp; index++;
				}
			}
		}
		printf("#%d %d\n", i + 1, index);
		index = 0;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    6 |         scanf_s("%d", &count);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    set <int> s;
    while(n--)
    {
        int x;
        cin>>x;
        if(s.find(x)!=s.end())
            s.erase(x);
        else
            s.insert(x);
    }
    cout<<s.size();/
    return 0;
 } 

Compiler output:
a.cc: In function 'int main()':
a.cc:17:20: error: expected primary-expression before '/' token
   17 |     cout<<s.size();/
      |                    ^
a.cc:18:5: error: expected primary-expression before 'return'
   18 |     return 0;
      |     ^~~~~~
Language: C++

N=int(input())
sister=[]
for i in range (N):
    A=int(input())
    sister.append(A)
sister
import collections
c=collections.Counter(sister)
sister_unique=list(set(sister))
count=0
for j in range (len(sister_unique)):
    if c[sister_unique[j]]%2!=0:
        count+=1
print (count)

Compiler output:
a.cc:1:1: error: 'N' does not name a type
    1 | N=int(input())
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
long long n;
string st,st1;
const int MAX=4294967295;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>st1;
		if(st.find(st1)==MAX)st+=st1;else 
		st.replace(st.find(st1),st1.size(),"");
	}
	cout<<st.size()<<endl;
	return 0;
}
	return 0;
}

Compiler output:
a.cc:18:9: error: expected unqualified-id before 'return'
   18 |         return 0;
      |         ^~~~~~
a.cc:19:1: error: expected declaration before '}' token
   19 | }
      | ^
Language: C++

#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;
using ll = long long;

int main() {
	int n;
	cin >> n;
	vector<long long >v[100000];
	int ans = 0, s = 0;
	for (int i = 0;i < n;i++)cin >> a[i];
	sort(v, v + n);
	while (s < n) {
		int aa = a[s], p = 0;
		while (s < n&&aa == a[s]) {
			p++;
			s++;
		}
		ans += p % 2;
	}
	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:41: error: 'a' was not declared in this scope
   12 |         for (int i = 0;i < n;i++)cin >> a[i];
      |                                         ^
a.cc:15:26: error: 'a' was not declared in this scope; did you mean 'aa'?
   15 |                 int aa = a[s], p = 0;
      |                          ^
      |                          aa
a.cc:17:25: error: 'p' was not declared in this scope
   17 |                         p++;
      |                         ^
a.cc:20:24: error: 'p' was not declared in this scope
   20 |                 ans += p % 2;
      |                        ^
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
using ll = long long;

int main() {
	int n;
	cin >> n;
	int a[n];
	for (int i = 0;i < n;i++)cin >> a[i];
	int ans = 0, s = 0;
	while (s < n) {
		int aa = a[s], p = 0;
		while (s < n&&aa = a[s]) {
			p++;
			s++;
		}
		ans += p % 2;
	}
	cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:29: error: lvalue required as left operand of assignment
   14 |                 while (s < n&&aa = a[s]) {
      |                        ~~~~~^~~~
Language: C++

#include<iostream>
#include<map>
using namespace std;
using ll = long long;

int main() {
	int n;
	cin >> n;
	map<ll,ll> mp;
	for (int i = 0;i < n;i++) {
		ll a;
		cin >> a;
		mp[a]++;
	}
	ll ans = 0;
	ll n = mp.size();
	for (ll i = 0;i < n;i++) {
		if (mp[i] % 2 == 1)ans++;
		if (mp[i] == 0)i--;
	}
	cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:12: error: conflicting declaration 'll n'
   16 |         ll n = mp.size();
      |            ^
a.cc:7:13: note: previous declaration as 'int n'
    7 |         int n;
      |             ^
Language: C++

#include<iostream>
#include<map>
using namespace std;
using ll = long long;

int main() {
	int n;
	cin >> n;
	map<ll,ll> mp;
	for (int i = 0;i < n;i++) {
		ll a;
		cin >> a;
		mp[a]++;
	}
	int ans = 0;
	int n = mp.size();
	for (ll i = 0;i < n;i++) {
		if (mp[i] % 2 == 1)ans++;
		if (mp[i] == 0)i--;
	}
	cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:13: error: redeclaration of 'int n'
   16 |         int n = mp.size();
      |             ^
a.cc:7:13: note: 'int n' previously declared here
    7 |         int n;
      |             ^
Language: C++

#include<iostream>
#include<map>
using namespace std;
using ll = long long;

int main() {
	int n;
	cin >> n;
	map<ll,ll> mp;
	for (int i = 0;i < n;i++) {
		ll a;
		cin >> a;
		mp[a]++
	}
	int ans = 0;
	for (ll i = 0;i < mp.size();i++) {
		if (mp[i] % 2 == 1)ans++;
	}
	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:24: error: expected ';' before '}' token
   13 |                 mp[a]++
      |                        ^
      |                        ;
   14 |         }
      |         ~
Language: C++

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {

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

		int N = s.nextInt();
		int[] nums = new int[N];
		for (int i = 0; i < N; i++) {
			nums[i] = s.nextInt();
		}

		List<Integer> list = new ArrayList<>();
		for (int num : nums) {
			if (!list.contains(num)) {
				list.add(num);
			}else{
				int idx=list.indexOf(num);
				list.remove(idx);
			}

		}

		int[] newNums = new int[list.size()];
		for (int i = 0; i < newNums.length; i++) {
			newNums[i] = list.get(i);
		}
		System.out.println(newNums.length);
	}

}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.ArrayList;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.util.List;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: 'import' does not name a type
    3 | import java.util.Scanner;
      | ^~~~~~
a.cc:3:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:5:1: error: expected unqualified-id before 'public'
    5 | public class Main {
      | ^~~~~~
Language: C++

#include <iostream>
using namespace std;
long long f[1000000001], n;
int main(void){
    // Your code here!
    cin >> n;
    for (int i = 0; i < n; i++) {
        int a;
        cin >> a;
        f[a]++;
    }
    long long res = 0;
    for (int i = 1; i <= 1000000001; i++) {
        if (f[i] % 2 == 1) res++;
    }
    cout << res << endl;
}


Compiler output:
/tmp/cckHccfF.o: in function `main':
a.cc:(.text+0xb): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cckHccfF.o
a.cc:(.text+0x7f): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cckHccfF.o
collect2: error: ld returned 1 exit status
Language: C++

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

int main() {
	int n;
	vector <int> v;
	cin >> n;
	int ans = n;
	for (int i = 0; i < n; i++) {
		cin >> v[i];
	}
	for (int j = 0; j < n; i++) {
		for (int k = 0; k < n; k++) {
			if (v[j] == v[k]) {
				ans -= 2;
				v[j] = j-100000;
				v[k] = k-100000;
			}
		}
	}
	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:32: error: 'i' was not declared in this scope
   13 |         for (int j = 0; j < n; i++) {
      |                                ^
Language: C++

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

int main() {
	int n;
	vector <int> v;
	cin >> n;
	int ans = n;
	for (int i = 0; i < n; i++) {
		cin >> v[i];
	}
	for (int j = 0; j < n; i++) {
		for (int k = 0; k < n; k++) {
			if (v[j] == v[k]) {
				ans -= 2;
				v[j] = j-100000;
				v[k] = k-100000;
			}
		}
	}
	cout << ans << endl;
	return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:13:32: error: 'i' was not declared in this scope
   13 |         for (int j = 0; j < n; i++) {
      |                                ^
Language: C++

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

int main() {
	int n;
	vector <int> v;
	cin >> n;
	int ans = n;
	for (int i = 0; i < n; i++) {
		cin >> v[i];
	}
	for (int j = 0; j < n; i++) {
		for (int k = 0; k < n; k++) {
			if (v[j] == v[k]) {
				ans -= 2;
				v[j] = -1*j;
				v[k] = -1*k;
			}
		}
	}
	cout << ans << endl;
	return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:13:32: error: 'i' was not declared in this scope
   13 |         for (int j = 0; j < n; i++) {
      |                                ^
Language: C++

#include <iostream>
#include <map>

using namespace std;

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

    map<int, int> m;
    while (n--) {
        int a;
        cin >> a;
        ++m[a];
    }
    int ans = 0;
    for (int& p : m) {
        if (p.second % 2 != 0) ++ans;
    }
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:19: error: invalid initialization of reference of type 'int&' from expression of type 'std::pair<const int, int>'
   18 |     for (int& p : m) {
      |                   ^
a.cc:19:15: error: request for member 'second' in 'p', which is of non-class type 'int'
   19 |         if (p.second % 2 != 0) ++ans;
      |               ^~~~~~
Language: C++

#include <iostream>
#include <unordered_map>

using namespace std;

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

    unordered_map<int, int> m;
    while (n--) {
        int a;
        cin >> a;
        if (m[a]) ++m[a];
        else m[a] = 1;
        }
    }
    int ans = 0;
    for (auto& p : m) {
        if (p.second % 2 != 0) ++ans;
    }
    cout << ans << endl;
}

Compiler output:
a.cc:20:5: error: expected unqualified-id before 'for'
   20 |     for (auto& p : m) {
      |     ^~~
a.cc:23:5: error: 'cout' does not name a type
   23 |     cout << ans << endl;
      |     ^~~~
a.cc:24:1: error: expected declaration before '}' token
   24 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
static const ll MAX=1000000000;
static const int NMAX=100000;
bool flag[MAX];
int cunt;
ll A;
int main(){
    int N;
    cin>>N;
    for(int i=0;i<N;i++){
        cin>>A;
        if(flag[A]){
            flag[A]=0;
            cunt--;
        }else{
            flag[A]=1;
            cunt++;
        }
    }
    cout<<cunt;
    return 0;


Compiler output:
a.cc: In function 'int main()':
a.cc:23:14: error: expected '}' at end of input
   23 |     return 0;
      |              ^
a.cc:9:11: note: to match this '{'
    9 | int main(){
      |           ^
Language: C++

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

bool flag[MAX];
int A[NMAX],cunt;
int main(){
    int N;
    cin>>N;
    for(int i=0;i<N;i++){
        cin>>A[i];
        if(flag[A[i]]){
            flag[A[i]]=0;
            cunt--;
        }else{
            flag[A[i]]=1;
            cunt++;
        }
    }
    cout<<cunt;
    return 0;
}


Compiler output:
a.cc:4:11: error: 'MAX' was not declared in this scope
    4 | bool flag[MAX];
      |           ^~~
a.cc:5:7: error: 'NMAX' was not declared in this scope
    5 | int A[NMAX],cunt;
      |       ^~~~
a.cc: In function 'int main()':
a.cc:10:14: error: 'A' was not declared in this scope
   10 |         cin>>A[i];
      |              ^
a.cc:11:12: error: 'flag' was not declared in this scope
   11 |         if(flag[A[i]]){
      |            ^~~~
Language: C++

#include <iostream>
#include <vector>
#include <map>
using namespace std;
using ll=long long;

int main(){
    ll N;
    cin >> N;
    vector<ll> a;
    for(ll i = 0; i < N; ++i){
        ll tmp;
        cin >> tmp;
        a.push_back(tmp);
    }
    sort(a.begin(),a.end());
    int count = 1;
    vector<pair<int,int> > b;
    if(N == 1){
        b.push_back(make_pair(a[0],count));
    } else {
        for(int i = 0; i < N - 1; ++i){
            if(a[i+1] == a[i]) ++count;
            else{
                b.push_back(make_pair(a[i],count));
                count = 1;
            }
        }
        b.push_back(make_pair(a[N-1],count));
    }
    ll ans = 0;
    for(ll i = 0; i < b.size(); ++i) ans += b[i].second % 2;
    cout << ans << endl;
    return 0;
}

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());
      |     ^~~~
      |     short
Language: C++

#include <iostream>
#include <stdlib.h>
using namespace std;


int main(){
	int n;
	int k = 0;
	bool[1000000000] ans = {0};
	cin >> n;
	for(int i=0;i<n;i++){
		int a = 0;
		if(ans[a]){
			ans[a] = false;
			k--;
		}else{
			ans[a] = true;
			k++;
		}
	}
	cout << k;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: expected identifier before numeric constant
    9 |         bool[1000000000] ans = {0};
      |              ^~~~~~~~~~
a.cc:9:14: error: expected ']' before numeric constant
    9 |         bool[1000000000] ans = {0};
      |              ^~~~~~~~~~
      |              ]
a.cc:9:13: error: structured binding declaration cannot have type 'bool'
    9 |         bool[1000000000] ans = {0};
      |             ^
a.cc:9:13: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:9:13: error: empty structured binding declaration
a.cc:9:26: error: expected initializer before 'ans'
    9 |         bool[1000000000] ans = {0};
      |                          ^~~
a.cc:13:20: error: 'ans' was not declared in this scope; did you mean 'abs'?
   13 |                 if(ans[a]){
      |                    ^~~
      |                    abs
Language: Java

import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
  long N = sc.nextLong();
  Set<Integer> s = new HashSet<Integer>();
  for(long i = 0;i < N;i++){
    long temp = sc.nextLong();
    if(s.contains(temp))s.remove(temp);
    else s.add(temp);
  }
  System.out.println(s.size());
}}

Compiler output:
Main.java:10: error: incompatible types: long cannot be converted to Integer
    else s.add(temp);
               ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error
Language: C++

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

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

    vector<int> v;
    for (int i = 0; i < N; i++) {
        cin >> A;
        vector<int>::iterator itr = find(v.begin(), v.end(), A);
        if (itr != v.end()) {
            itr = v.erase(itr);
        } else {
            v.push_back(A);
        }
    }
    cout << v.size() << endl;
}

Compiler output:
a.cc:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:13:41: error: no matching function for call to 'find(std::vector<int>::iterator, std::vector<int>::iterator, int&)'
   13 |         vector<int>::iterator itr = find(v.begin(), v.end(), A);
      |                                     ~~~~^~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note: candidate: 'template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(istreambuf_iterator<_CharT>, istreambuf_iterator<_CharT>, const _CharT2&)'
  435 |     find(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note:   template argument deduction/substitution failed:
a.cc:13:41: note:   '__gnu_cxx::__normal_iterator<int*, std::vector<int> >' is not derived from 'std::istreambuf_iterator<_CharT>'
   13 |         vector<int>::iterator itr = find(v.begin(), v.end(), A);
      |                                     ~~~~^~~~~~~~~~~~~~~~~~~~~~~
Language: C++

// ConsoleApplication11.cpp : アプリケーションのエントリ ポイントを定義します。
//

#include "stdafx.h"


// ConsoleApplication10.cpp : アプリケーションのエントリ ポイントを定義します。
//


// ConsoleApplication10.cpp : アプリケーションのエントリ ポイントを定義します。
//
#include<iostream>
#include<cmath>
#include<vector>
#include<algorithm>
using namespace std;


int main()
{
	int N, M, x, y, j, c,ans, i, k, ptr,l, m, sum;
	cin >> N;
	vector<int> A(N);
	for (i = 0; i < N; i++) {
		cin >> A[i];
	}
	sum = 0;
	m = 0;
	ptr = 0;
	sort(A.begin(), A.end());
	while(ptr<N){
		int un;
		un = A[ptr];
		while (ptr < N&&A[ptr] == un) {
			ptr++;
			m++;
		}
		sum += m % 2;
	}

	cout << sum << endl;







	return 0;
}





Compiler output:
a.cc:4:10: fatal error: stdafx.h: No such file or directory
    4 | #include "stdafx.h"
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

//#include <bits/stdc++.h>
#include<iostream>
#include<string>
#include<queue>
#include<vector>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)//初期値a,i<bの範囲でループ
#define REP(i,n) FOR(i,0,n)//初期値0,i<nの範囲でループ
using namespace std;
typedef long long ll;//int64
typedef unsigned long long ull;

int n;
ll c[100010],a;
int cnt,flag;
int cc;
int main(){
    cin>>n;
    REP(i,n){
        cin>>c[i];
        
/*
        REP(j,i){
            if(c[j]==c[i]){
                cout<<"kaburi"<<endl;
                c[j]=0;
                c[i]=0;
            }
        }
        */
    }
    sort(c,c+n);


    REP(i,n-1){
        if(c[i]==c[i+1]){
            cnt++;
        }else{
            if(cnt%2==0)cc++;
            cnt=0;
        }



    }
    cout<<cc;
    

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:31:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   31 |     sort(c,c+n);
      |     ^~~~
      |     short
Language: C++

#include <iostream>
#include <algorithm>

using namespace std;

int main() {
    int N, A[100000] = {0};
    int ptr = 0, ans = 0;

    cin >> N;

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

    sort(A, A + N);

    while ( ptr < N ) {
        int cc = A[ptr], t = 0;
        while (ptr < N && A[i] == cc) { t++, ptr++; }
        ans += t % 2;
    }

    cout << ans << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:29: error: 'i' was not declared in this scope
   20 |         while (ptr < N && A[i] == cc) { t++, ptr++; }
      |                             ^
Language: C

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

public class Main {

	public static void main(String[] args) {
		ArrayList<Integer> list =new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt(),ans=0;
		
		for(int i=0;i<N;i++) 
			list.add(sc.nextInt());
		Collections.sort(list);
		for(int i=0;i<N;)
		{
			int target  = list.get(i);
			int count = 0;
			while(i<N && list.get(i)==target)
			{
				count ++; i++;
			}
			ans +=  count % 2;
			
		}
		System.out.println(ans);
	}

}


Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import java.util.ArrayList;
      | ^~~~~~
main.c:1:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    1 | import java.util.ArrayList;
      |            ^
main.c:2:1: error: unknown type name 'import'
    2 | import java.util.Collections;
      | ^~~~~~
main.c:2:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    2 | import java.util.Collections;
      |            ^
main.c:3:1: error: unknown type name 'import'
    3 | import java.util.Scanner;
      | ^~~~~~
main.c:3:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    3 | import java.util.Scanner;
      |            ^
main.c:5:1: error: unknown type name 'public'
    5 | public class Main {
      | ^~~~~~
main.c:5:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Main'
    5 | public class Main {
      |              ^~~~
Language: C

# include < cstdio >
# include < algorithm >
using namespace std ;
int N , ptr , res ;
int A [100000];
int main ()
{
scanf ( " % d " ,& N );
for ( int i =0; i < N ; i ++) scanf ( " % d " ,& A [ i ]);
sort (A , A + N );
while ( ptr < N )
{
int cc = A [ ptr ] , f =0;
while ( ptr < N && A [ ptr ]== cc ) f ++ , ptr ++;
res += f %2;
}
printf ( " % d \ n " , res );
}

Compiler output:
main.c:1:11: fatal error:  cstdio : No such file or directory
    1 | # include < cstdio >
      |           ^~~~~~~~~~
compilation terminated.
Language: Java

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

public class C_73 {

	public static void main(String[] args) {
		ArrayList<Integer> list =new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt(),ans=0;
		
		for(int i=0;i<N;i++) 
			list.add(sc.nextInt());
		Collections.sort(list);
		
		for(int i=1;i<N;i++) 
		{
			int count = 0;
			while(i<N && list.get(i)==list.get(i-1))
			{
				count ++;i++;
			}
			ans +=  count % 2;
			
		}
		System.out.println(ans);
	}

}


Compiler output:
Main.java:5: error: class C_73 is public, should be declared in a file named C_73.java
public class C_73 {
       ^
1 error
Language: Java

import java.util.ArrayList;
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		ArrayList<Integer> list =new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		C_73 c_73 =new C_73();
		int N = sc.nextInt();
		int num;
		for(int i=0;i<N;i++) 
		{
			num = sc.nextInt();
			if(c_73.search(list, num)==false) list.add(num);
			else								 list.remove(c_73.Idx(list, num));
		}
		System.out.println(list.size());
	}
	
	boolean search(ArrayList<Integer> list,int target) 
	{
		for(int i=0;i<list.size();i++) 
			if(list.get(i) == target) return true;
		return false;
	}
	int Idx(ArrayList<Integer> list,int n) 
	{
		int idx=0;
		for(int i=0;i<list.size();i++) 
			if(list.get(i) == n) idx = i;
		return idx;
	}
	
}


Compiler output:
Main.java:8: error: cannot find symbol
		C_73 c_73 =new C_73();
		^
  symbol:   class C_73
  location: class Main
Main.java:8: error: cannot find symbol
		C_73 c_73 =new C_73();
		               ^
  symbol:   class C_73
  location: class Main
2 errors
Language: C++

#include <iostream>
#include <vector>
#include<algorithm>
#include<iomanip>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define REP(i,m,n) for(int i=m;i<(int)(n);i++)
typedef pair<int,int> pint;
typedef long long ll;
const int inf   = 1<<30;
const ll  longinf = 1LL<<60;
int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};
int main(){
  int n;
  cin>>n;
  int a[n];
  rep(i,n)scanf("%d",&a[i]);
  sort(a,a+n);
  int i=0,ans=0;
  while(i<n){
    if(a[i]==a[i+1])
      i+=2;
    else{
      ans++;
      i++;
      }
    }
  printf("%d\n",ans);
  return 0;
  }
#include <iostream>
#include <vector>
#include<algorithm>
#include<iomanip>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define REP(i,m,n) for(int i=m;i<(int)(n);i++)
typedef pair<int,int> pint;
typedef long long ll;
const int inf   = 1<<30;
const ll  longinf = 1LL<<60;
int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};
int main(){
  int n;
  cin>>n;
  int a[n];
  rep(i,n)scanf("%d",&a[i]);
  sort(a,a+n);
  int i=0,ans=0;
  while(i<n){
    if(a[i]==a[i+1])
      i+=2;
    else{
      ans++;
      i++;
      }
    }
  printf("%d\n",ans);
  return 0;
  }

Compiler output:
a.cc:40:11: error: redefinition of 'const int inf'
   40 | const int inf   = 1<<30;
      |           ^~~
a.cc:10:11: note: 'const int inf' previously defined here
   10 | const int inf   = 1<<30;
      |           ^~~
a.cc:41:11: error: redefinition of 'const ll longinf'
   41 | const ll  longinf = 1LL<<60;
      |           ^~~~~~~
a.cc:11:11: note: 'const ll longinf' previously defined here
   11 | const ll  longinf = 1LL<<60;
      |           ^~~~~~~
a.cc:42:5: error: redefinition of 'int dx [4]'
   42 | int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};
      |     ^~
a.cc:12:5: note: 'int dx [4]' previously defined here
   12 | int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};
      |     ^~
a.cc:42:23: error: redefinition of 'int dy [4]'
   42 | int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};
      |                       ^~
a.cc:12:23: note: 'int dy [4]' previously defined here
   12 | int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};
      |                       ^~
a.cc:43:5: error: redefinition of 'int main()'
   43 | int main(){
      |     ^~~~
a.cc:13:5: note: 'int main()' previously defined here
   13 | int main(){
      |     ^~~~
Language: C++

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

int main(void){
  int n,s=0,i,j,x;
  int *a;

  scanf("%d",&n);
  a = calloc(n,sizeof(int));

  for(i=0;i<n;i++)
    a[i]=0;

  for(i=0;i<n;i++){
    scanf("%d",&x);
    for(j=0;j<n;j++){
      if(a[j]==x){
        a[j]=0;
        break;
      }
    }
    if(j==n)a[i]=x;
  }

  for(i=0;i<n;i++){
    if(a[i]!=0) s++;
  }

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

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: invalid conversion from 'void*' to 'int*' [-fpermissive]
    9 |   a = calloc(n,sizeof(int));
      |       ~~~~~~^~~~~~~~~~~~~~~
      |             |
      |             void*
Language: C++

# -*- coding: utf-8 -*-
import math
import sys
import itertools
import numpy as np
import functools
import collections
mo = 1000000007
INF = 10**100
r = range

class infix(object):
    def __init__(self, function):
        self.function = function

    def __ror__(self, other):
        self.left = other
        return self

    def __or__(self, other):
        return self.function(self.left, other)

    def __call__(self, value1, value2):
        return self.function(value1, value2)

@infix
def c(f_t_u, f_u_r): return lambda t: f_u_r(f_t_u(t))

class _Ap(object):
    def __rlshift__(self, other):
        self.value = other
        return self

    def __rshift__(self, other):
        return other(self.value)
Ap = _Ap()
A = Ap

#d = {1:2, 3:5, 6:10, 1000043:3814}
#zip(d.keys(), d.values())<<ap>>(list |c| sorted |c| reversed |c| list |c| print)

n=input()<<A>>int
memo = {}
for i in range(n):
    x = input()<<A>>int
    if x in memo:
        memo[x] += 1
    else:
        memo[x] = 1;

ret = 0
for x in memo.values():
    ret += x % 2

print(ret)



Compiler output:
a.cc:1:3: error: invalid preprocessing directive #-
    1 | # -*- coding: utf-8 -*-
      |   ^
a.cc:26:1: error: stray '@' in program
   26 | @infix
      | ^
a.cc:39:2: error: invalid preprocessing directive #d
   39 | #d = {1:2, 3:5, 6:10, 1000043:3814}
      |  ^
a.cc:40:2: error: invalid preprocessing directive #zip
   40 | #zip(d.keys(), d.values())<<ap>>(list |c| sorted |c| reversed |c| list |c| print)
      |  ^~~
a.cc:2:1: error: 'import' does not name a type
    2 | import math
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:44:1: error: expected unqualified-id before 'for'
   44 | for i in range(n):
      | ^~~
a.cc:51:1: error: 'ret' does not name a type
   51 | ret = 0
      | ^~~
Language: C++

#include <iostream>
#define int long long
signed main(){
  int N;
  bool A[1000000000]={};
  cin >> N;
  int in;
  int ans=0;
  for(int i=0;i<N;i++){
    cin >> in;
    if(A[in]==1)A[in]=0;
    else		A[in]=1;
  }
  for(int i=0;i<1000000000;i++){
    ans+=A[i];
  }
  cout << ans;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   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:17:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   17 |   cout << ans;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
int N;
cin>>N;
map<int,int> mp;
for(int i=0;i<N;i++){
int a;
cin>>a;
mp[a]++;
}
int ans = 0;
for(auto it:mp){
if(it.sc%2==1) ans++;
}
cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:7: error: 'struct std::pair<const int, int>' has no member named 'sc'
   14 | if(it.sc%2==1) ans++;
      |       ^~
Language: C++

import java.util.HashMap;
import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		HashMap<Integer,Boolean> hm=new HashMap<Integer,Boolean>();
		int n=sc.nextInt();
		for(int i=0;i<n;i++){
			int buf=sc.nextInt();
			if(hm.containsKey(buf)){
				hm.remove(buf);
			}else{
				hm.put(buf,true);
			}
		}
		System.out.println(hm.size());
	}

}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.HashMap;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.util.Scanner;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:5:15: error: expected ':' before 'static'
    5 |         public static void main(String[] args) {
      |               ^~~~~~~
      |               :
a.cc:5:33: error: 'String' has not been declared
    5 |         public static void main(String[] args) {
      |                                 ^~~~~~
a.cc:5:42: error: expected ',' or '...' before 'args'
    5 |         public static void main(String[] args) {
      |                                          ^~~~
a.cc:20:2: error: expected ';' after class definition
   20 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:6:17: error: 'Scanner' was not declared in this scope
    6 |                 Scanner sc = new Scanner(System.in);
      |                 ^~~~~~~
a.cc:7:17: error: 'HashMap' was not declared in this scope
    7 |                 HashMap<Integer,Boolean> hm=new HashMap<Integer,Boolean>();
      |                 ^~~~~~~
a.cc:7:25: error: 'Integer' was not declared in this scope
    7 |                 HashMap<Integer,Boolean> hm=new HashMap<Integer,Boolean>();
      |                         ^~~~~~~
a.cc:7:33: error: 'Boolean' was not declared in this scope
    7 |                 HashMap<Integer,Boolean> hm=new HashMap<Integer,Boolean>();
      |                                 ^~~~~~~
a.cc:7:42: error: 'hm' was not declared in this scope
    7 |                 HashMap<Integer,Boolean> hm=new HashMap<Integer,Boolean>();
      |                                          ^~
a.cc:7:49: error: 'HashMap' does not name a type
    7 |                 HashMap<Integer,Boolean> hm=new HashMap<Integer,Boolean>();
      |                                                 ^~~~~~~
a.cc:7:74: error: expected primary-expression before ')' token
    7 |                 HashMap<Integer,Boolean> hm=new HashMap<Integer,Boolean>();
      |                                                                          ^
a.cc:8:23: error: 'sc' was not declared in this scope
    8 |                 int n=sc.nextInt();
      |                       ^~
a.cc:17:17: error: 'System' was not declared in this scope
   17 |                 System.out.println(hm.size());
      |                 ^~~~~~
Language: C++

int N, i = 0, ct = 0, j = 0,ans = 0;
	cin >> N;
	int new_n, erace=0;
	int num[100000];
	cin >> num[0];
	ct++;
	while (ct < N) {
		cin >> new_n;
		for (j = 0; j < (ct-erace); j++) {
			if (new_n == num[j]) {
				num[j] = -1;
				erace++;
				break;
			}
		}


		
		if (j == (ct-erace)) {
			num[ct-erace] = new_n;
		}
		
		ct++;
	}
	for (i = 0; i < N;i++) {
		if (num[i] > 0) {
			ans++;
		}
	}
	cout << ans;

	
    return 0;
}

Compiler output:
a.cc:2:9: error: 'cin' does not name a type
    2 |         cin >> N;
      |         ^~~
a.cc:5:9: error: 'cin' does not name a type
    5 |         cin >> num[0];
      |         ^~~
a.cc:6:9: error: 'ct' does not name a type
    6 |         ct++;
      |         ^~
a.cc:7:9: error: expected unqualified-id before 'while'
    7 |         while (ct < N) {
      |         ^~~~~
a.cc:25:9: error: expected unqualified-id before 'for'
   25 |         for (i = 0; i < N;i++) {
      |         ^~~
a.cc:25:21: error: 'i' does not name a type
   25 |         for (i = 0; i < N;i++) {
      |                     ^
a.cc:25:27: error: 'i' does not name a type
   25 |         for (i = 0; i < N;i++) {
      |                           ^
a.cc:30:9: error: 'cout' does not name a type
   30 |         cout << ans;
      |         ^~~~
a.cc:33:5: error: expected unqualified-id before 'return'
   33 |     return 0;
      |     ^~~~~~
a.cc:34:1: error: expected declaration before '}' token
   34 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
unordered_set<int> s;
int main() {
int n; cin >> n;
for (Int i = 0; i < n; i++) {
int a; cin >> a;
auto it = s.find(a);
if (it != s.end()) {
s.erase(a);
} else {
s.insert(a);
}
}
std::cout << s.size() << "\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:6: error: 'Int' was not declared in this scope; did you mean 'int'?
    6 | for (Int i = 0; i < n; i++) {
      |      ^~~
      |      int
a.cc:6:17: error: 'i' was not declared in this scope
    6 | for (Int i = 0; i < n; i++) {
      |                 ^
Language: C++

# include < cstdio >
# include < algorithm >
using namespace std ;
int N , ptr , res ;
int A [100000];
int main ()
{
scanf ( " % d " ,& N );
for ( int i =0; i < N ; i ++) scanf ( " % d " ,& A [ i ]);
sort (A , A + N );
while ( ptr < N )
{
int cc = A [ ptr ] , f =0;
while ( ptr < N && A [ ptr ]== cc ) f ++ , ptr ++;
res += f %2;
}
printf ( " % d \ n " , res );
}


Compiler output:
a.cc:1:11: fatal error:  cstdio : No such file or directory
    1 | # include < cstdio >
      |           ^~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
#include<string>
#include<set>
using namespace std;

int main()
{
	set<int> intList;
	set<int>::iterator p;

	int N;
	cin >> N;


	for (int i = 0; i < N; i++) {
		int tmp;
		cin >> tmp;
		auto ite = find(intList.begin(), intList.end(), tmp);
		if (ite != intList.end()){
			intList.erase(ite);
		}
		else{
			intList.insert(tmp);
		}
	}

	cout << intList.size() << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:32: error: no matching function for call to 'find(std::set<int>::iterator, std::set<int>::iterator, int&)'
   18 |                 auto ite = find(intList.begin(), intList.end(), tmp);
      |                            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note: candidate: 'template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(istreambuf_iterator<_CharT>, istreambuf_iterator<_CharT>, const _CharT2&)'
  435 |     find(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note:   template argument deduction/substitution failed:
a.cc:18:32: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'std::istreambuf_iterator<_CharT>'
   18 |                 auto ite = find(intList.begin(), intList.end(), tmp);
      |                            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

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

int main()
{
	vector<int> intList;
	vector<int>::iterator p;

	int N;
	cin >> N;


	for (int i = 0; i < N; i++) {
		int tmp;
		cin >> tmp;
		auto ite = find(intList.begin(), intList.end(), tmp);
		if (ite != intList.end()){
			intList.erase(ite);
		}
		else{
			intList.push_back(tmp);
		}
	}

	cout << intList.size() << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:32: error: no matching function for call to 'find(std::vector<int>::iterator, std::vector<int>::iterator, int&)'
   18 |                 auto ite = find(intList.begin(), intList.end(), tmp);
      |                            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note: candidate: 'template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(istreambuf_iterator<_CharT>, istreambuf_iterator<_CharT>, const _CharT2&)'
  435 |     find(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note:   template argument deduction/substitution failed:
a.cc:18:32: note:   '__gnu_cxx::__normal_iterator<int*, std::vector<int> >' is not derived from 'std::istreambuf_iterator<_CharT>'
   18 |                 auto ite = find(intList.begin(), intList.end(), tmp);
      |                            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~