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

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

int main()
{
  int N;
  cin >> N;
  
  vector<int> a(N);
  for(int i = 0; i < N; i++)
  {
    cin >> a.at(i);
  }
  
  int ans = 0;
  sort(a.begin(), a.end());
  reverse(a.begin(), a.end());
  if(N % 2 == 0)
  {
    for(int i = 0; i < N / 2; i++)
    {
      ans += a.at(2i) - a.at(2i + 1);
    }
    cout << ans << endl;
    return 0;
  }
  else
  {
    for(int i = 0; i < (N - 1) / 2; i++)
    {
      ans += a.at(2i) - a.at(2i + 1);
    }
    ans += a.at(N - 1);
    cout << ans << endl;
    return 0;
  }
}

Compiler output:
a.cc:1:9: fatal error: vits/stdc++.h: No such file or directory
    1 | #include<vits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int N;
    int i,j=0;
    cin>>N;
    vector<int> vec(105);
    int countA=0,countB=0;
    for(i=0;i<N;i++ ){
    cin>>vec.at(i);
    }
    sort(vec.begin(),vec.end());
    for(i=N-1;i>=0;i--){
    if(j%2==0){
    countA+-vec.at(i);}
     else
    countB+=vec.at(i);
     j++}
    cout<<countA-countB<<endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: expected ';' before '}' token
   18 |      j++}
      |         ^
      |         ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int N;
    int i,j=0;
    cin>>N;
    vector<int> vec();
    int countA=0,countB=0;
    for(i=0;i<N;i++ ){
    cin>>vec.at(i);
    }
    sort(vec.begin(),vec.end());
    for(i=N-1;i>=0;i--){
    if(j%2==0){
    countA+-vec.at(i);}
     else
    countB+=vec.at(i);
     j++}
    cout<<countA-countB<<endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    7 |     vector<int> vec();
      |                    ^~
a.cc:7:20: note: remove parentheses to default-initialize a variable
    7 |     vector<int> vec();
      |                    ^~
      |                    --
a.cc:10:14: error: request for member 'at' in 'vec', which is of non-class type 'std::vector<int>()'
   10 |     cin>>vec.at(i);
      |              ^~
a.cc:12:14: error: request for member 'begin' in 'vec', which is of non-class type 'std::vector<int>()'
   12 |     sort(vec.begin(),vec.end());
      |              ^~~~~
a.cc:12:26: error: request for member 'end' in 'vec', which is of non-class type 'std::vector<int>()'
   12 |     sort(vec.begin(),vec.end());
      |                          ^~~
a.cc:15:17: error: request for member 'at' in 'vec', which is of non-class type 'std::vector<int>()'
   15 |     countA+-vec.at(i);}
      |                 ^~
a.cc:17:17: error: request for member 'at' in 'vec', which is of non-class type 'std::vector<int>()'
   17 |     countB+=vec.at(i);
      |                 ^~
a.cc:18:9: error: expected ';' before '}' token
   18 |      j++}
      |         ^
      |         ;
Language: C++

#include<iostream>
using namespace std;
int main(){
    int N;
    int i,j=0;
    cin>>N;
    vector<int> vec();
    int countA=0,countB=0;
    for(i=0;i<N;i++ ){
    cin>>vec.at(i);
    }
    sort(vec.begin(),vec.end());
    for(i=N-1;i>=0;i--){
    if(j%2==0){
    countA+-vec.at(i);}
     else
    countB+=vec.at(i);
     j++}
    cout<<countA-countB<<endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'vector' was not declared in this scope
    7 |     vector<int> vec();
      |     ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include<iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:7:12: error: expected primary-expression before 'int'
    7 |     vector<int> vec();
      |            ^~~
a.cc:10:10: error: 'vec' was not declared in this scope
   10 |     cin>>vec.at(i);
      |          ^~~
a.cc:12:10: error: 'vec' was not declared in this scope
   12 |     sort(vec.begin(),vec.end());
      |          ^~~
a.cc:12:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |     sort(vec.begin(),vec.end());
      |     ^~~~
      |     short
a.cc:18:9: error: expected ';' before '}' token
   18 |      j++}
      |         ^
      |         ;
Language: C++

#include<iostream>
using namespace std;
int main(){
    int N;
    int i,j=0;
    cin>>N;
    int vector<int> vec();
    int countA=0,countB=0;
    for(i=0;i<N;i++ ){
    cin>>vec.at(i);
    }
    sort(vec.begin(),vec.end());
    for(i=N-1;i>=0;i--){
    if(j%2==0){
    countA+-vec.at(i);}
     else
    countB+=vec.at(i);
     j++}
    cout<<countA-countB<<endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:7:15: error: expected initializer before '<' token
    7 |     int vector<int> vec();
      |               ^
a.cc:10:10: error: 'vec' was not declared in this scope
   10 |     cin>>vec.at(i);
      |          ^~~
a.cc:12:10: error: 'vec' was not declared in this scope
   12 |     sort(vec.begin(),vec.end());
      |          ^~~
a.cc:12:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |     sort(vec.begin(),vec.end());
      |     ^~~~
      |     short
a.cc:18:9: error: expected ';' before '}' token
   18 |      j++}
      |         ^
      |         ;
Language: C++

#include<iostream>
using namespace std;
int main(){
    int N;
    int i,j=0;
    cin>>N;
    int vec[105];
    int countA=0,countB=0;
    for(i=0;i<N;i++ ){
    cin>>vec[i];
    }
    sort(vec[0],vec[N-1]);
    for(i=N-1;i>=0;i--){
    if(j%2==0){
    countA+-vec[i];}
     else
    countB+=vec[i];
     j++}
    cout<<countA-countB<<endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |     sort(vec[0],vec[N-1]);
      |     ^~~~
      |     short
a.cc:18:9: error: expected ';' before '}' token
   18 |      j++}
      |         ^
      |         ;
Language: C++

#include<iostream>
using namespace std;
int main(){
    int N;
    int i,j=0;
    cin>>N;
    int vec[105]
    int countA=0,countB=0;
    for(i=0;i<N;i++ ){
    cin>>vec[i];
    }
    sort(vec[0],vec[N-1])
    for(i=N-1;i>=0;i--){
    if(j%2==0){
    countA+-vec[i];}
     else
    countB+=vec[i];
     j++}
    cout<<countA-countB<<endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: expected initializer before 'int'
    8 |     int countA=0,countB=0;
      |     ^~~
a.cc:10:10: error: 'vec' was not declared in this scope
   10 |     cin>>vec[i];
      |          ^~~
a.cc:12:10: error: 'vec' was not declared in this scope
   12 |     sort(vec[0],vec[N-1])
      |          ^~~
a.cc:12:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |     sort(vec[0],vec[N-1])
      |     ^~~~
      |     short
a.cc:13:23: error: expected ';' before ')' token
   13 |     for(i=N-1;i>=0;i--){
      |                       ^
      |                       ;
a.cc:19:11: error: 'countA' was not declared in this scope
   19 |     cout<<countA-countB<<endl;
      |           ^~~~~~
a.cc:19:18: error: 'countB' was not declared in this scope
   19 |     cout<<countA-countB<<endl;
      |                  ^~~~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
    int N;
    vector<int> card(N);
    for (int i=0; i<N ;i++){
        cin >> card.at(i);
    }
    int point_a,point_b;
    int ans;
    sort(card.begin(), card.end());
    reverse(card.begin(), card.end());
    for(int i=0 ;i<N;i++){
        if(i%2==0){
            point_a += card.at(i)
        }
        if(i%2==1){
            point_b +=card.at(i)
        }
    }
    ans = point_a - point_b
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'vector' was not declared in this scope
    6 |     vector<int> card(N);
      |     ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:6:12: error: expected primary-expression before 'int'
    6 |     vector<int> card(N);
      |            ^~~
a.cc:8:16: error: 'card' was not declared in this scope
    8 |         cin >> card.at(i);
      |                ^~~~
a.cc:12:10: error: 'card' was not declared in this scope
   12 |     sort(card.begin(), card.end());
      |          ^~~~
a.cc:12:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |     sort(card.begin(), card.end());
      |     ^~~~
      |     short
a.cc:13:5: error: 'reverse' was not declared in this scope
   13 |     reverse(card.begin(), card.end());
      |     ^~~~~~~
a.cc:22:28: error: expected ';' before 'cout'
   22 |     ans = point_a - point_b
      |                            ^
      |                            ;
   23 |     cout << ans << endl;
      |     ~~~~
Language: C++

#include <iostream>
using namespace std;
int main() {
  	int n; cin >> n;
	int A[123];
	int a = 0, b = 0;
	for (int i = 0; i < n; ++i) {
		cin >> A[i];
	}
	sort(A, A+n, greater<int>());
	for (int i = 0; i < n; ++i) {
		if (i%2) b += A[i];
		else a += A[i];
	}
	cout << a-b;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   10 |         sort(A, A+n, greater<int>());
      |         ^~~~
      |         short
Language: C++

#include <iostream>
using namespace std;
int main() {
  	int n; cin >> n;
	int A[123];
	for (int i = 0; i < n; ++i) {
		cin >> A[i];
	}
	sort(A, A+n, greater<int>());
	for (int i = 0; i < n; ++i) {
		if (i%2) b += A[i];
		else a += A[i];
	}
	cout << a-b;
}

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
a.cc:11:26: error: 'b' was not declared in this scope
   11 |                 if (i%2) b += A[i];
      |                          ^
a.cc:12:22: error: 'a' was not declared in this scope
   12 |                 else a += A[i];
      |                      ^
a.cc:14:17: error: 'a' was not declared in this scope
   14 |         cout << a-b;
      |                 ^
a.cc:14:19: error: 'b' was not declared in this scope
   14 |         cout << a-b;
      |                   ^
Language: C++

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

int main() {
  int N;
  vector <int> ai(N);
  
  for (int i=0;i<N;i++){
    cin >> ai.at(i);
  }
  
  sort(a,a+N,greater<int>());
  
  int suma=0;
  int sumb=0;
  for(int i=0;i<N;i++){
    if(i%2 == 0) suma+=ai.at(i);
    else if(i%2 == 1) sumb+=ai.at(i);
  }
  
  cout << suma - sumb << endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:8: error: 'a' was not declared in this scope; did you mean 'ai'?
   12 |   sort(a,a+N,greater<int>());
      |        ^
      |        ai
Language: C++

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

int main() {
  int N;
  vector <int> ai(N);
  
  for (int i=0;i<N;i++){
    cin >> a.at(i);
  }
  
  sort(a.begin(),a.end());
  reverse(a.begin(),a.end());
  
  int suma=0;
  int sumb=0;
  for(int i=0;i<N;i++){
    if(i%2 == 0) suma+=ai.at(i);
    else if(i%2 == 1) sumb+=ai.at(i);
  }
  
  cout << suma - sumb << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: 'a' was not declared in this scope
    9 |     cin >> a.at(i);
      |            ^
a.cc:12:8: error: 'a' was not declared in this scope; did you mean 'ai'?
   12 |   sort(a.begin(),a.end());
      |        ^
      |        ai
Language: C++

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

int main() {
  int N;
  vector <int> ai(N);
  
  for (int i=0;i<N;i++){
    cin >> a.at(i);
  }
  
  sort(a.begin(),a.end());
  reverse(a.begin(),a.end());
  
  int suma=0;
  int sumb=0;
  for(int i=0;i<N;i++){
    if(i%2 == 0) suma+=ai.at(i);
    else sumb+=ai.at(i);
  }
  
  cout << suma - sumb << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: 'a' was not declared in this scope
    9 |     cin >> a.at(i);
      |            ^
a.cc:12:8: error: 'a' was not declared in this scope; did you mean 'ai'?
   12 |   sort(a.begin(),a.end());
      |        ^
      |        ai
Language: Java

import java.util.Scanner;
 import java.util.Arrays;

          
public class SolveB {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
         Scanner s=new Scanner(System.in);

        int n=s.nextInt();

        int arr[]=new int[n];

     
        for(int i=0;i<n;i++)
        {
            arr[i]=s.nextInt();
            
        }
        Arrays.sort(arr);
        int sum=0,sum1=0;
        for(int i=n-1;i>=0;i=i-2)
        {
            sum=sum+arr[i];
            
            
        }
        for(int j=n-2;j>=0;j=j-2)
        {
            sum1=sum1+arr[j];
        }
        System.out.println(sum-sum1);
         //System.out.println(sum1);
        
        
 
        
       
        
    }
    
}


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

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


int main(){
  cin.tie(0);
  ios_base::sync_with_stdio(false);
  int n;
  cin>>n;
  int a[101];
  for(int i=0;i<n;i++){
    cin>>a[i];
  }
  sort(a,a+n);
  int s=0;
  int t=0;
  int i=n-1;
  while(i>=0){
    s +=a[i];
    t +=s[i-1];
    i=i-2;
  }
  cout<<s-t;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:20:10: error: invalid types 'int[int]' for array subscript
   20 |     t +=s[i-1];
      |          ^
Language: C++

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

int main(){
  int N;
  int a[110];
  cin >>N;
  int sum=0;
  int total=0;
  for(int i=0;i<N;i++){
    cin>>a[i];
    sort(a,a+N,greater<int>());
    if(i%2==0){
      sum+=a{i];
      }
      else {
        total+=a[i];
      }
    }
    cout<<sum-total<<endl;
  }



Compiler output:
a.cc: In function 'int main()':
a.cc:15:10: error: invalid conversion from 'int*' to 'int' [-fpermissive]
   15 |       sum+=a{i];
      |       ~~~^~~
      |          |
      |          int*
a.cc:15:13: error: expected ';' before '{' token
   15 |       sum+=a{i];
      |             ^
      |             ;
a.cc:17:7: error: expected '}' before 'else'
   17 |       else {
      |       ^~~~
a.cc:14:15: note: to match this '{'
   14 |     if(i%2==0){
      |               ^
Language: C++

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

int main(){
  int N;
  int a[110];
  cin >>N;
  int sum=0;
  int total=0;
  for(int i=0;i<N;i++){
    cin>>a[i];
    sort(a,a+N,greater<int>());
    if(i%2==0){
      sum+=a{i];}
      else {
        total+=a[i];
      }
    }
    cout<<sum-total<<endl;
  }



Compiler output:
a.cc: In function 'int main()':
a.cc:15:10: error: invalid conversion from 'int*' to 'int' [-fpermissive]
   15 |       sum+=a{i];}
      |       ~~~^~~
      |          |
      |          int*
a.cc:15:13: error: expected ';' before '{' token
   15 |       sum+=a{i];}
      |             ^
      |             ;
a.cc:16:7: error: expected '}' before 'else'
   16 |       else {
      |       ^~~~
a.cc:14:15: note: to match this '{'
   14 |     if(i%2==0){
      |               ^
Language: C++

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

int main(){
  int N;
  int a[110];
  cin >>N;
  for(int i=0;i<N;i++){
    cin>>a[i];
    sort(a,a+N,greater<int>());
    int sum=0;
    int total=0;
    if(i%2==0){
      sum+=a{i];
            }
      else {
        total+=a[i];
      }
    }
    cout<<sum-total<<endl;
  }



Compiler output:
a.cc: In function 'int main()':
a.cc:15:10: error: invalid conversion from 'int*' to 'int' [-fpermissive]
   15 |       sum+=a{i];
      |       ~~~^~~
      |          |
      |          int*
a.cc:15:13: error: expected ';' before '{' token
   15 |       sum+=a{i];
      |             ^
      |             ;
a.cc:17:7: error: expected '}' before 'else'
   17 |       else {
      |       ^~~~
a.cc:14:15: note: to match this '{'
   14 |     if(i%2==0){
      |               ^
a.cc:21:11: error: 'sum' was not declared in this scope
   21 |     cout<<sum-total<<endl;
      |           ^~~
a.cc:21:15: error: 'total' was not declared in this scope
   21 |     cout<<sum-total<<endl;
      |               ^~~~~
Language: C++

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

int main(){
  int N;
  int a[110];
  cin >>N;
  for(int i=0;i<N;i++){
    cin>>a[i];
    sort(a,a+N,greater<int>());
    int sum=0;
    int total=0;
  }
    for(int i=0;i<N;i++){
    if(i%2==0){
      sum+=a{i];
            }
      else {
        total+=a[i];
      }
    }
    cout<<sum-total<<endl;
  }



Compiler output:
a.cc: In function 'int main()':
a.cc:17:7: error: 'sum' was not declared in this scope
   17 |       sum+=a{i];
      |       ^~~
a.cc:19:7: error: expected '}' before 'else'
   19 |       else {
      |       ^~~~
a.cc:16:15: note: to match this '{'
   16 |     if(i%2==0){
      |               ^
a.cc:20:9: error: 'total' was not declared in this scope
   20 |         total+=a[i];
      |         ^~~~~
a.cc:23:11: error: 'sum' was not declared in this scope
   23 |     cout<<sum-total<<endl;
      |           ^~~
a.cc:23:15: error: 'total' was not declared in this scope
   23 |     cout<<sum-total<<endl;
      |               ^~~~~
Language: C++

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

int main(){
  int N;
  vector<int> a[110];
  cin >>N;
  for(int i=0;i<N;i++){
    cin>>a[i];
    sort(a,a+N,greater<int>());
    int sum=0;
    int total=0;
  }
    for(int i=0;i<N;i++){
    if(i%2==0){
      sum+=a{i];
            }
      else {
        total+=a[i];
      }
    }
    cout<<sum-total<<endl;
  }



Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'vector' was not declared in this scope
    7 |   vector<int> a[110];
      |   ^~~~~~
a.cc:3:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    2 | #include<algorithm>
  +++ |+#include <vector>
    3 | using namespace std;
a.cc:7:10: error: expected primary-expression before 'int'
    7 |   vector<int> a[110];
      |          ^~~
a.cc:10:10: error: 'a' was not declared in this scope
   10 |     cin>>a[i];
      |          ^
a.cc:17:7: error: 'sum' was not declared in this scope
   17 |       sum+=a{i];
      |       ^~~
a.cc:17:12: error: 'a' was not declared in this scope
   17 |       sum+=a{i];
      |            ^
a.cc:19:7: error: expected '}' before 'else'
   19 |       else {
      |       ^~~~
a.cc:16:15: note: to match this '{'
   16 |     if(i%2==0){
      |               ^
a.cc:20:9: error: 'total' was not declared in this scope
   20 |         total+=a[i];
      |         ^~~~~
a.cc:20:16: error: 'a' was not declared in this scope
   20 |         total+=a[i];
      |                ^
a.cc:23:11: error: 'sum' was not declared in this scope
   23 |     cout<<sum-total<<endl;
      |           ^~~
a.cc:23:15: error: 'total' was not declared in this scope
   23 |     cout<<sum-total<<endl;
      |               ^~~~~
Language: C++

#include<iosream>
#include<algorithm>
#include<vector>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;

int main(){
  int n;
  cin>>n;
  vector<int> a(n);
  rep(i,n) cin>>a[i];
  sort(a.begin(),a.end(),greater<int>());
  int sa=0,sb=0;
  rep(i,n){
    if(i%2==0) sa+=a[i];
    else sb+=a[i];
  }
  cout<<sa-sb<<endl;
}

Compiler output:
a.cc:1:9: fatal error: iosream: No such file or directory
    1 | #include<iosream>
      |         ^~~~~~~~~
compilation terminated.
Language: C++

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

int main() {
    vector<int> vec;
    int a;
    a = vec.size();
    sort(vec.begin(), vec.end()); 
    reverse(vec.begin(), vec.end());
    int one answer = 0;
    int two answer = 0;

    for (int i = 0; i < vec.size(); i += 2;) {
        one answer+= vec.at(i);
    }
     for (int j = 1; j < vec.size(); j += 2;) {
        two answer+= vec.at(j);
    }
  cout << one answer - two answer << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: expected initializer before 'answer'
   10 |     int one answer = 0;
      |             ^~~~~~
a.cc:11:13: error: expected initializer before 'answer'
   11 |     int two answer = 0;
      |             ^~~~~~
a.cc:13:43: error: expected ')' before ';' token
   13 |     for (int i = 0; i < vec.size(); i += 2;) {
      |         ~                                 ^
      |                                           )
a.cc:13:44: error: expected primary-expression before ')' token
   13 |     for (int i = 0; i < vec.size(); i += 2;) {
      |                                            ^
a.cc:16:44: error: expected ')' before ';' token
   16 |      for (int j = 1; j < vec.size(); j += 2;) {
      |          ~                                 ^
      |                                            )
a.cc:16:45: error: expected primary-expression before ')' token
   16 |      for (int j = 1; j < vec.size(); j += 2;) {
      |                                             ^
a.cc:19:11: error: 'one' was not declared in this scope
   19 |   cout << one answer - two answer << endl;
      |           ^~~
Language: C++

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

int main() {
  int N;
  cin >> N;
  vector<int> a(N);
  int i,j;
  //dainyu-
  for(i=0;i<N;i++){cin >> a.at(i);}
  
  for(i=0;i<N;i++){
    int max=0,s;
    for(j=0;j<N;j++){
      if(max<a.at(j)){
        max=a.at(j);
        s=j;
      }
    }
    a.at(s)=0;
    if(i%2==0){sum1+=max;}
    else{sum2+=max;}
  }
	cout<<sum1-sum2<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:16: error: 'sum1' was not declared in this scope
   21 |     if(i%2==0){sum1+=max;}
      |                ^~~~
a.cc:22:10: error: 'sum2' was not declared in this scope
   22 |     else{sum2+=max;}
      |          ^~~~
a.cc:24:15: error: 'sum1' was not declared in this scope
   24 |         cout<<sum1-sum2<<endl;
      |               ^~~~
a.cc:24:20: error: 'sum2' was not declared in this scope
   24 |         cout<<sum1-sum2<<endl;
      |                    ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
 
int main() {
  int n;
  vector<int>a(n);
  for(int i(0);i<n;i++)	cin >> a.at(i);
  sort(a.begin(),a.end());
  reverse(a.begin(),a.end());
  int A, B;
  for(int i(0);i<n;i+=2){
    A += a.at(i);
    if(i+1=n)	break;
    B += a.at(i+1);
  }
  cout << A-B;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: lvalue required as left operand of assignment
   13 |     if(i+1=n)   break;
      |        ~^~
Language: C++

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

int main() {
    int N;
    cin >> N;
    vector<int> n(N);
    for(int i=0;i<N;i++) cin >> n[i];
    sort(n.begin(),n.end());
    reverse(n.begin(),n.end());
    int sum1 = 0,sum2 = 0;
    for(int i=0;i<N;i++) {
        if(i % 2 == 0) sum1 += n[i];
        else sum2 += n[i];
    }
    if(sum1 >= sum2) cout << sum1 - sum2;
    else cout << sum2 - sum1;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |     sort(n.begin(),n.end());
      |     ^~~~
      |     short
a.cc:12:5: error: 'reverse' was not declared in this scope
   12 |     reverse(n.begin(),n.end());
      |     ^~~~~~~
Language: C++

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

int main() {
    int N;
    cin >> N;
    vector<int> n(N);
    for(int i=0;i<N;i++) cin >> n[i];
    sort(n.rbegin(),n.rend());
    int sum1 = 0,sum2 = 0;
    for(int i=0;i<N;i+=2) {
        sum1 += n[i];
    }
    for(int i=1;i<N;i+=2) {
        sum2 += n[i];
    }
    if(sum1 >= sum2) cout << sum1 - sum2;
    else cout << sum2 - sum1;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |     sort(n.rbegin(),n.rend());
      |     ^~~~
      |     short
Language: C++

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

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

vector<int> num(N) ;

for( int i = 0 ; i < N ; i++){
       cin >> num.at(i) ;
}
sort(num.begin(), num.end() );
reverse(num.begin(), num.end() );

int A = 0, B = 0 ;
for(int i = 0; i<N ; i++){
       if( i%2 == 0){
               A = A + num.at(i) ;
       else {
               B = B + num.at(i) ;
        }
}
cout << A - B << endl;



}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:8: error: expected '}' before 'else'
   20 |        else {
      |        ^~~~
a.cc:18:21: note: to match this '{'
   18 |        if( i%2 == 0){
      |                     ^
Language: C++

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

int main(){
  int N;
  cin >> N;
  vector<int> a(N);
  rep(i,N){
    cin >> a.at(i);
  }
  sort(a.begin(),a.end());
  reverse(a.begin(),a.end());
  int A=0,B=0;
  rep(i,n){
    if(i%2){
      B += a.at(i);
    }else{
      A += a.at(i);
    }
  }
  cout << A - B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: 'n' was not declared in this scope
   15 |   rep(i,n){
      |         ^
a.cc:3:32: note: in definition of macro 'rep'
    3 | #define rep(i,n) for(int i=0;i<n;++i)
      |                                ^
Language: C++

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

int main(){
  int N;
  cin >> N;
  
  vector<int>a(N);
  for(int i = 0; i < N ; i++){
    cin >> a.at(i);
  }
  int Alice = 0, Bob = 0; 
  
  sort(a.begin(), a.end());
  
  for(int i = 0; i < N / 2; i++){
    Alice += a.at(i * 2);
    Bob += a.at(i * 2 + 1);
  }
  if(N % 2 == 1)Alice += a.(N - 1);
  cout << Alice - Bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:28: error: expected unqualified-id before '(' token
   20 |   if(N % 2 == 1)Alice += a.(N - 1);
      |                            ^
Language: C++

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

int main(){
	int N;
	cin >> N;
	vector<int> Ass(N);
	
	for(int i = 0;i<N;i++){
		cin >> Ass.at(i);
	}
	
	sort(Ass.begin(),Ass.end());
	reserve(Ass.begin(),Ass.end());
	
	int diffs = 0;
	
	for(int j = 0;j<N;j++){
		int c = Ass.at(j);
		
		if(j%2 == 0)
			diffs = diffs + c;
		else
			diffs = diffs - c;
	}
	
	cout << diffs << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: 'reserve' was not declared in this scope
   14 |         reserve(Ass.begin(),Ass.end());
      |         ^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  int a[110];
  cin>>n;
  for(int i=0;i<N;i++){
    cin>>a[i];
    sort(a,a+N,greater<int>());
    int sum=0;
    int total=0;
    for(int i=0;i<N;i++){
      if(i==0||i%2==0){
        sum+=a[i];
      }
      else{
        total+=a[i];
      }
    }
  cout<<sum-total<<endl;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:6:8: error: 'n' was not declared in this scope
    6 |   cin>>n;
      |        ^
a.cc:21:4: error: expected '}' at end of input
   21 |   }
      |    ^
a.cc:3:12: note: to match this '{'
    3 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  cin>>N;
 vector<int> vec;
   
 sort(vec.begin(),vec.end());
  reverse(vec.begin(),vec.end());
   int sum=0;
   int total=0;
  for(i=0;i<N;i++){
    if(i==0||i%2==0){
      sum+=vec.at(i);
    }
    else if(i%2==1){
      total+=vec.at(i);
    }
  }
 cout<<sum-total<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:7: error: 'i' was not declared in this scope
   12 |   for(i=0;i<N;i++){
      |       ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
 vector<int> vec;
   
 sort(vec.begin(),vec.end());
  reverse(vec.begin(),vec.end());
   int sum=0;
   int total=0;
  for(i=0;i<N;i++){
    if(i==0||i%2==0){
      sum+=vec.at(i);
    }
    if(i%2==1){
      total+=vec.at(i);
    }
  }
 cout<<sum-total<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:7: error: 'i' was not declared in this scope
   10 |   for(i=0;i<N;i++){
      |       ^
a.cc:10:13: error: 'N' was not declared in this scope
   10 |   for(i=0;i<N;i++){
      |             ^
Language: C++

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

int main(){
	int N;
	cin >> N;
	vector<int> Ass(N);
	
	for(int i = 0;i<N;i++){
		cin >> Ass.at(i);
	}
	
	int Alice = 0;
	int Bob = 0;
	int DBAB = 0;
	
	for(int j = 0;j<N;j++){
		int MXP = 0;
		int MXK = 0;
		
		for(int k = 0;k<N;k++){
			int c = ASS.at(k);
			
			if(c>MXP){
				MXP = c;
				MXK = k;
			}
		}
		
		ASS.at(MXK) = -1;
		
		if(j%2==0)
			Alice = Alice + MXP;
		else
			Bob = Bob + MXP;
	}
	
	DBAB = Alice - Bob;
	
	cout << DBAB << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:33: error: 'ASS' was not declared in this scope; did you mean 'Ass'?
   22 |                         int c = ASS.at(k);
      |                                 ^~~
      |                                 Ass
a.cc:30:17: error: 'ASS' was not declared in this scope; did you mean 'Ass'?
   30 |                 ASS.at(MXK) = -1;
      |                 ^~~
      |                 Ass
Language: C++

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

int main(){
	int N;
	cin >> N;
	vector<int> Ass(N);
	
	for(int i = 0;i<N;i++){
		cin >> Ass.at(i);
	}
	
	int diffs=0;
	
	for(int j = 0;j<N;j++){
		int PPP=0;
		int PPS=0;
		
		for(int k = 0;k<N;k++){
			int c = Ass.at(k);
			if(PPS<c){
				PPP = k;
				PPS = c;
		}
		
		Ass.at(PPP) = -1;
		
		if(j%2==0)
			diffs = diffs + PPS;
		else
			diffs = diffs - PPS;
		
	}
	
	cout << diffs << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:2: error: expected '}' at end of input
   36 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main() {
  int N;
  cin>>N;
  vector<int> data(N);
  rep(i,N){cin>>data[i];}
  sort(data.begin(),data.end());
  reverse(data.begin(),data.end());
  int a=0,b=0;
  if(N%2==0){
    rep(i,N/2){
    a+=data[i*2]; b+=data[i*2+1];
    }
  }
  else{
    rep(i,N/2){
    a+=data[i*2]; b+=data[i*2+1];
    }
    a+=data[N]
  }
  cout<<(a-b)<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:15: error: expected ';' before '}' token
   22 |     a+=data[N]
      |               ^
      |               ;
   23 |   }
      |   ~
Language: C++

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

int main() {
  int N;
  cin>>N;
  int data[N];
  rep(i,N){cin>>data[i];}
  sort(data.begin(),data.end());
  reverse(data.begin(),data.end());
  int a=0,b=0;
  if(N%2==0){
    rep(i,N/2){
    a+=data[i*2]; b+=data[i*2+1];
    }
  }
  else{
    rep(i,N/2){
    a+=data[i*2]; b+=data[i*2+1];
    }
    a+=data[N]
  }
  cout<<(a-b)<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: request for member 'begin' in 'data', which is of non-class type 'int [N]'
   10 |   sort(data.begin(),data.end());
      |             ^~~~~
a.cc:10:26: error: request for member 'end' in 'data', which is of non-class type 'int [N]'
   10 |   sort(data.begin(),data.end());
      |                          ^~~
a.cc:11:16: error: request for member 'begin' in 'data', which is of non-class type 'int [N]'
   11 |   reverse(data.begin(),data.end());
      |                ^~~~~
a.cc:11:29: error: request for member 'end' in 'data', which is of non-class type 'int [N]'
   11 |   reverse(data.begin(),data.end());
      |                             ^~~
a.cc:22:15: error: expected ';' before '}' token
   22 |     a+=data[N]
      |               ^
      |               ;
   23 |   }
      |   ~
Language: Java

import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer a[] = new Integer[N];
		for(int i=0;i<N;i++){
			a[i] = sc.nextint();
		}
		Arrays.sort(a,Comparator.reverseOrder());
		
		int Alice = 0;
		int Bob = 0;
		for(int i=0; i<N; i+=2){
			Alice += a[i];
		}
		for(int i=1;i<N;i+=2){
			Bob += a[i];
		}
		System.out.println(Alice - Bob);
	}
}

Compiler output:
Main.java:9: error: cannot find symbol
			a[i] = sc.nextint();
			         ^
  symbol:   method nextint()
  location: variable sc of type Scanner
1 error
Language: C++

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

int main() {
  int N,i,count=0;
  cin>>N;
  vector<int> num(N);
  for(i=0;i<N;i++)cin>>num[i];    
  sort(num.begin(),num.end());
  reverse(num.begin().num.end());
  for(i=0;i<N;i++){
    if(i%2==0)count+=num[i];
    else count-=num[i];
  }
  cout<<count<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:23: error: 'std::vector<int>::iterator' has no member named 'num'
   10 |   reverse(num.begin().num.end());
      |                       ^~~
Language: C++

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

int main() {
  int N,i,count=0;
  cin>>N;
  vector<int> num(N);
  for(i=0;i<N;i++)cin>>num[i];    
  sort(num.begin(),num.end());
  reverse(num.begin().num.end());
  for(i=0;i<N;i++){
    if(i%2==0)count+=num[i];
    else count-=num[i]
  }
  cout<<count<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:23: error: 'std::vector<int>::iterator' has no member named 'num'
   10 |   reverse(num.begin().num.end());
      |                       ^~~
a.cc:13:23: error: expected ';' before '}' token
   13 |     else count-=num[i]
      |                       ^
      |                       ;
   14 |   }
      |   ~
Language: C++

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

int main() {
  int N,j,i;
  cin>>N;
  vector<int> num(N);
  vector<int> ren(N);
  for(i=0;i<N;i++)cin>>num[i];
  ren[0]=num[0];
  for(j=0;i<N;j++){
    for(i=0;i<N;i++){
      if(ren[j]<num[i]){
        ren[j]=num[i];
      }
    }
    for(i=0;i<N;i++){
      if(ren[j]==num[i]){
        num[i]=0;
        break;
      }
    }
  }
  int sum=0
  for(i=0;i<N;i++){
    if(i%2==0)sum+=ren[i];
    else sum-=ren[i];
  }
  cout<<sum<<endl;
  
        
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:3: error: expected ',' or ';' before 'for'
   25 |   for(i=0;i<N;i++){
      |   ^~~
a.cc:25:18: error: expected ';' before ')' token
   25 |   for(i=0;i<N;i++){
      |                  ^
      |                  ;
Language: C++

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

int main(){
    int n;
    cin >> n;
    vector<int> a(n);
    for(int i=0;i<n;i++){
        cin >> a.at(i);
    }
    sort(a.begin(),a.end());
    reverse(a.begin(),a.end());
    int alice=0,bob=0;
    for(int i=0;i<n;i++){
        if(i%2==0){
            //アリスのターン
            alice+=a.at(i);
        }
        else{
            bob+=a.at(i);
        }
    }
    cout << alice-bob << endl;
}


Compiler output:
a.cc:4:9: fatal error: bits/std++.h: No such file or directory
    4 | #include<bits/std++.h>
      |         ^~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

int main(){
    int n;
    cin >> n;
    vector<int> a(n);
    for(int i=0;i<n;i++){
        cin >> a.at(i);
    }
    sort(a.begin(),a.end());
    reverse(a.begin(),a.end());
    int alice=0,bob=0;
    for(int i=0;i<n;i++){
        if(i%2==0){
            //アリスのターン
            alice+=a.at(i);
        }
        else{
            bob+=a.at(i);
        }
    }
    cout << alice-bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   13 |     sort(a.begin(),a.end());
      |     ^~~~
      |     short
a.cc:14:5: error: 'reverse' was not declared in this scope
   14 |     reverse(a.begin(),a.end());
      |     ^~~~~~~
Language: C++


#include <bits/stdc++.h>
using namespace std;
int main(){
    int  N; 
    cin>>N;

    
    vector<int> vec(N);
    for (int i = 0; i < N; i++){
        cin >> vec.at(i);
    }

    int a=0;
    int b=0;
       
    sort(vec.begin(),vec.end());//並び替え
    reverse(vec.begin(),vec.end());//おおきい順
    if(i%2==0){
     for(int i=0; i<N;i++){
     a=a+vec.at(i);
    }
    }
  else{
    for(int i=0; i<N;i++){
     b=b+vec.at(i);
    }
  }
    cout<<a-b<<endl;
   }


Compiler output:
a.cc: In function 'int main()':
a.cc:19:8: error: 'i' was not declared in this scope
   19 |     if(i%2==0){
      |        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int  N; 
    cin>>N;

    
    vector<int> vec(N);
    for (int i = 0; i < N; i++){
        cin >> vec.at(i);
    }

    int a=0;
    int b=0;
       
    sort(vec.begin(),vec.end());//並び替え
    reverse(vec.begin(),vec.end());//おおきい順
    if(i%2==0){
     for(int i=0; i<N;i++){
     a=a+vec.at(i)
    }
    }
  else{
    for(int i=0; i<N;i+){
     b=b+vec.at(i+)
    }
  }
    cout<<Sa-Sb<<endl;
   }


Compiler output:
a.cc: In function 'int main()':
a.cc:18:8: error: 'i' was not declared in this scope
   18 |     if(i%2==0){
      |        ^
a.cc:20:19: error: expected ';' before '}' token
   20 |      a=a+vec.at(i)
      |                   ^
      |                   ;
   21 |     }
      |     ~              
a.cc:24:24: error: expected primary-expression before ')' token
   24 |     for(int i=0; i<N;i+){
      |                        ^
a.cc:25:19: error: expected primary-expression before ')' token
   25 |      b=b+vec.at(i+)
      |                   ^
a.cc:28:11: error: 'Sa' was not declared in this scope; did you mean 'a'?
   28 |     cout<<Sa-Sb<<endl;
      |           ^~
      |           a
a.cc:28:14: error: 'Sb' was not declared in this scope; did you mean 'b'?
   28 |     cout<<Sa-Sb<<endl;
      |              ^~
      |              b
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int  N; 
    cin>>N;

    
    vector<int> vec(N);
    for (int i = 0; i < N; i++){
        cin >> vec.at(i);
    }

    int Sa=0;
    int Sb=0;
       
    sort(vec.begin(),vec.end());//並び替え
    reverse(vec.begin(),vec.end());//おおきい順
    for(int i=0; i<N;i++){
     Sa=Sa+vec.at(2*i)
    }
    for(int i=0; i<N;i+){
     Sb=Sb+vec.at(2*i+1)
    }
    cout<<Sa-Sb<<endl;
   }


Compiler output:
a.cc: In function 'int main()':
a.cc:19:23: error: expected ';' before '}' token
   19 |      Sa=Sa+vec.at(2*i)
      |                       ^
      |                       ;
   20 |     }
      |     ~                  
a.cc:21:24: error: expected primary-expression before ')' token
   21 |     for(int i=0; i<N;i+){
      |                        ^
a.cc:22:25: error: expected ';' before '}' token
   22 |      Sb=Sb+vec.at(2*i+1)
      |                         ^
      |                         ;
   23 |     }
      |     ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int  N; 
    cin>>N;

    
    vector<int> vec(N);
    for (int i = 0; i < N; i++)
    {
        cin >> vec.at(i);
    }

    int Sa=0;
    int Sb=0;
       
    sort(vec.begin(),vec.end());//並び替え
    reverse(vec.begin(),vec.end());//おおきい順
    for(int i=0; i<N;i++){
    Sa=Sa+vec.at(2*i)
    Sb=Sb+vec.at(2*i+1)
    }
    cout<<Sa-Sb<<endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:20:22: error: expected ';' before 'Sb'
   20 |     Sa=Sa+vec.at(2*i)
      |                      ^
      |                      ;
   21 |     Sb=Sb+vec.at(2*i+1)
      |     ~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int  N; 
    cin>>N;

    
    vector<int> vec(N);
    for (int i = 0; i < N; i++)
    {
        cin >> vec.at(i);
    }

    int Sa=0
    int Sb=0
       
    sort(vec.begin(),vec.end());//並び替え
    reverse(vec.begin(),vec.end());//おおきい順
    for(int i=0; i<N;i++){
    Sa=Sa+vec.at(2*i)
    Sb=Sb+vec.at(2*i+1)
    }
    cout<<Sa-Sb<<endl;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: expected ',' or ';' before 'int'
   15 |     int Sb=0
      |     ^~~
a.cc:20:22: error: expected ';' before 'Sb'
   20 |     Sa=Sa+vec.at(2*i)
      |                      ^
      |                      ;
   21 |     Sb=Sb+vec.at(2*i+1)
      |     ~~                
a.cc:23:14: error: 'Sb' was not declared in this scope; did you mean 'Sa'?
   23 |     cout<<Sa-Sb<<endl;
      |              ^~
      |              Sa
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int>card(n);
  for(int i=0;i<n;i++) {
    cin >> card.at(i);}
  sort(card.begin(),card.end());
  reverce(card.begin(),card.end());
  int Alice=0;
  int Bob=0;
  char x='a';
  for(int i=0;i<n;i++) {
    if(x=='a') {
      Alice+=card.at(i);
      x='b';}
    else {
      Bob+=card.at(i);
      x='a';}
    int y=Alice-Bob;
    cout << y << endl;
    return 0;
  }
}

      
      
  


Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: 'reverce' was not declared in this scope
   10 |   reverce(card.begin(),card.end());
      |   ^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int>card(n);
  for(int i=0;i<n;i++) {
    cin >> card.at(i);}
  sort(card.begin(),card.end());
  reverce(card.begin(),card.end());
  int Alice=0;
  int Bob=0;
  char x='a';
  for(int i=0;i<n;i++) {
    if(x=='a') {
      Alice+=card.at(i);
      x='b';}
    else {
      Bob+=card.at(i);
      x='a';}
    int y=Alice-Bob;
    cout << y << endl;
    return 0;
  }
      
      
  


Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: 'reverce' was not declared in this scope
   10 |   reverce(card.begin(),card.end());
      |   ^~~~~~~
a.cc:24:4: error: expected '}' at end of input
   24 |   }
      |    ^
a.cc:3:12: note: to match this '{'
    3 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int>card(n);
  for(int i=0;i<n;i++) {
    cin >> card.at(i);}
  sort(card.begin(),card.end());
  reverce(card.begin(),card.end());
  int Alice=0;
  int Bob=0;
  string x=a;
  for(int i=0;i<n;i++) {
    if(x==a) {
      Alice+=card.at(i);
      x=b;}
    else {
      Bob+=card.at(i);
      x=a;}
    int y=Alice-Bob;
    cout << y << endl;
    return 0;
  }
      
      
  

Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: 'reverce' was not declared in this scope
   10 |   reverce(card.begin(),card.end());
      |   ^~~~~~~
a.cc:13:12: error: 'a' was not declared in this scope
   13 |   string x=a;
      |            ^
a.cc:17:9: error: 'b' was not declared in this scope
   17 |       x=b;}
      |         ^
a.cc:24:4: error: expected '}' at end of input
   24 |   }
      |    ^
a.cc:3:12: note: to match this '{'
    3 | int main() {
      |            ^
Language: C++

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

int main(){
  int cards = 0;
  cin >> cards;
  
  vector<int> points(cards);  
  for(int i = 0; i < points.size(); i++){
    cin >> points(i);
  }
  
  sort(points.begin(),points.end());
  revarse(points.begin(),points.end());
  
  int alice = 0;
  int bob = 0;
  for(int i = 0; i < points.size() i++){
    if(i % 2 == 0){
      alice += points.at(i);
    }
    else{
      bob += points.at(i);
    }
  }
  
  cout << alice - bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: no match for call to '(std::vector<int>) (int&)'
   10 |     cin >> points(i);
      |            ~~~~~~^~~
a.cc:14:3: error: 'revarse' was not declared in this scope
   14 |   revarse(points.begin(),points.end());
      |   ^~~~~~~
a.cc:18:35: error: expected ';' before 'i'
   18 |   for(int i = 0; i < points.size() i++){
      |                                   ^~
      |                                   ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int n, p[100];
  cin >> n;
  for(int i = 0; i < n; i++) cin >> p[i];
  sort(p, p + n, greater<int>());
  int a, b;
  for(int i = 0, i < n; i++){
    if(a % 2 == 0) a += p[i];
    else b += p[i];
  }
  cout << a - b << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: expected ';' before '<' token
    9 |   for(int i = 0, i < n; i++){
      |                   ^~
      |                   ;
a.cc:9:20: error: expected primary-expression before '<' token
    9 |   for(int i = 0, i < n; i++){
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int n, p[100];
  cin >> n;
  for(int i = 0; i < n; i++) cin >> p[i];
  sort(p.begin(), p.end(), greater<int>());
  int a, b;
  for(int i = 0, i < n; i++){
    if(a % 2 == 0) a += p[i];
    else b += p[i];
  }
  cout << a - b << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: request for member 'begin' in 'p', which is of non-class type 'int [100]'
    7 |   sort(p.begin(), p.end(), greater<int>());
      |          ^~~~~
a.cc:7:21: error: request for member 'end' in 'p', which is of non-class type 'int [100]'
    7 |   sort(p.begin(), p.end(), greater<int>());
      |                     ^~~
a.cc:9:19: error: expected ';' before '<' token
    9 |   for(int i = 0, i < n; i++){
      |                   ^~
      |                   ;
a.cc:9:20: error: expected primary-expression before '<' token
    9 |   for(int i = 0, i < n; i++){
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int n, p[];
  cin >> n;
  for(int i = 0; i < n; i++) cin >> p[i];
  sort(p.begin(), p.end(), greater<int>());
  int a, b;
  for(int i = 0, i < n; i++){
    if(a % 2 == 0) a += p[i];
    else b += p[i];
  }
  cout << a - b << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:10: error: storage size of 'p' isn't known
    4 |   int n, p[];
      |          ^
a.cc:9:19: error: expected ';' before '<' token
    9 |   for(int i = 0, i < n; i++){
      |                   ^~
      |                   ;
a.cc:9:20: error: expected primary-expression before '<' token
    9 |   for(int i = 0, i < n; i++){
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  int sub;
  sub = 0;
  cin >> N;
  vector<int> v(N);
  for(int i = 0; i < N; i++){
    cin >> v[i];
  }
  sort(v.begin(),v.end());
  reverse(v.begin(),v.end());
  for(int j = 0; j < N; j++){
    if(j %2 = 0){
      sum += v[j];
    }
    else{
      sum -= v[j];
    }
   
    
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:10: error: lvalue required as left operand of assignment
   16 |     if(j %2 = 0){
      |        ~~^~
a.cc:17:7: error: 'sum' was not declared in this scope; did you mean 'sub'?
   17 |       sum += v[j];
      |       ^~~
      |       sub
a.cc:20:7: error: 'sum' was not declared in this scope; did you mean 'sub'?
   20 |       sum -= v[j];
      |       ^~~
      |       sub
Language: C++

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

int main(){
  int n,alice,bob;
  m=0;
  cin >> n;
  vector<int> vec(n);
  
  for(int i=0;i<n;i++)
    cin >> vec.at(i);
  
  sort(vec.begin(),vec.end());
  reverse(vec.begin(),vec.end());
  
  for(int i=0;i<n;i+=2)
    alice+=vec.at(i);
  
  for(int i=0;i<n;i+=2)
    bob+=vec.at(i+1)
    
  cout << alice-bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'm' was not declared in this scope
    6 |   m=0;
      |   ^
a.cc:20:21: error: expected ';' before 'cout'
   20 |     bob+=vec.at(i+1)
      |                     ^
      |                     ;
   21 | 
   22 |   cout << alice-bob << endl;
      |   ~~~~
Language: C++

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

int main(){
  int n,m;
  cin >> n;
  vector<int> vec.(n);
  
  for(int i=0;i<n;i++)
    cin >> vec.at(i);
  
  sort(vec.begin(),vec.end());
  reverse(vec.begin(),vec.end());
  
  for(int i=0;i<n;i+=2)
    m+=vec.at(i)-vec.at(i+1);
  
  cout << m << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: expected initializer before '.' token
    7 |   vector<int> vec.(n);
      |                  ^
a.cc:10:12: error: 'vec' was not declared in this scope
   10 |     cin >> vec.at(i);
      |            ^~~
a.cc:12:8: error: 'vec' was not declared in this scope
   12 |   sort(vec.begin(),vec.end());
      |        ^~~