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

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

int main(){
  int N;
  int Alice,Bob;
  vector<int>a(N);

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:27: error: expected primary-expression before ')' token
    9 |   for(int i = 0; i < N; i+){
      |                           ^
a.cc:14:21: error: expected ';' before '}' token
   14 |     Alice += a.at(i)
      |                     ^
      |                     ;
   15 |     }
      |     ~                
a.cc:17:19: error: expected ';' before '}' token
   17 |     Bob += a.at(i)
      |                   ^
      |                   ;
   18 |     }
      |     ~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:12:8: error: expected ';' before '}' token
   12 |     i++
      |        ^
      |        ;
   13 |   }
      |   ~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:10:21: error: expected ';' before 'Bob'
   10 |     Alice += a.at(i)
      |                     ^
      |                     ;
   11 |     Bob += a.at(i+1)
      |     ~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:15: error: expected initializer before '+=' token
    9 |     int Alice += a.at(i)
      |               ^~
a.cc:13:11: error: 'Alice' was not declared in this scope
   13 |   cout << Alice - Bob << endl;
      |           ^~~~~
a.cc:13:19: error: 'Bob' was not declared in this scope
   13 |   cout << Alice - Bob << endl;
      |                   ^~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: expected ',' or ';' before 'sort'
    7 |     sort(a.end(),a.begin());
      |     ^~~~
a.cc:9:15: error: expected initializer before '+=' token
    9 |     int Alice += a.at(i)
      |               ^~
a.cc:13:11: error: 'Alice' was not declared in this scope
   13 |   cout << Alice - Bob << endl;
      |           ^~~~~
a.cc:13:19: error: 'Bob' was not declared in this scope
   13 |   cout << Alice - Bob << endl;
      |                   ^~~
Language: Java

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

public class Mian {
    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 A = 0;
        int B = 0;
        
        for (int i = 0; i < N; i+=2) {
            A += a[i];
        }
        
        for (int i = 1; i < N; i+=2) {
            B += a[i];
        }
        
        System.out.println(A - B);
    }
}


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

public class Hello{
    public static void Main(){

        int N = int.Parse(System.Console.ReadLine());
        string[] str = System.Console.ReadLine().Split(' ');
        int[] a = new int[N];
        for(int i = 0; i < N; i++){
            a[i] = int.Parse(str[i]);
        }
        
        System.Array.Sort(a);
        
        int Alice = 0;
        int Bob = 0;
        for(int i = N - 1; i >= 0; i -= 2){
            Alice += a[i];
        }
        for(int i = N - 2; i >= 0; i -= 2){
            Bob += a[i];
        }
        System.Console.WriteLine(Alice - Bob);
    }
}


Compiler output:
Main.java:4: error: class expected
        int N = int.Parse(System.Console.ReadLine());
                    ^
Main.java:4: error: ';' expected
        int N = int.Parse(System.Console.ReadLine());
                         ^
Main.java:4: error: ';' expected
        int N = int.Parse(System.Console.ReadLine());
                                                   ^
Main.java:8: error: class expected
            a[i] = int.Parse(str[i]);
                       ^
Main.java:8: error: ';' expected
            a[i] = int.Parse(str[i]);
                            ^
Main.java:8: error: not a statement
            a[i] = int.Parse(str[i]);
                                ^
Main.java:8: error: ';' expected
            a[i] = int.Parse(str[i]);
                                   ^
7 errors
Language: C++

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

int main(){
  int N,a[100];
  cin >> N;
  for(int i=0;i<N;i++){
    cin >> a[i];
  }
  sort(a,a+N,greater<int>());
  int a=0,b=0;
  for(int i=0;i<N;i++){
    if(i%2==0){
      a+=a[i];}
    else{
      b+=a[i];}
  }
  cout << a-b << endl;
  reutn 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:7: error: conflicting declaration 'int a'
   12 |   int a=0,b=0;
      |       ^
a.cc:6:9: note: previous declaration as 'int a [100]'
    6 |   int N,a[100];
      |         ^
a.cc:15:8: error: incompatible types in assignment of 'int' to 'int [100]'
   15 |       a+=a[i];}
      |       ~^~~~~~
a.cc:20:3: error: 'reutn' was not declared in this scope
   20 |   reutn 0;
      |   ^~~~~
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[i];
  sort(a.begin(),a.end());
  reverse(a.begin(),a.end());
  int cnt=0;
  for(int j=0;j<n;j++){
    if(i%2==0) cnt+=a[j];
    else cnt-=a[j];
  }
  cout<<cnt;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:8: error: 'i' was not declared in this scope
   12 |     if(i%2==0) cnt+=a[j];
      |        ^
Language: C++

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

int main() {
  int N;
  vector<int> ca(N);
  for (int i = 0; i < N ; i++){
    cin >> ca.at(i);
  }
  
 
  for (int i = 0; i < N - 1; i++){
    bool flg = false;
    for ( int j = 0; j < N - 1 - i ; j++){
      if (ca.at(i) < ca.at(i+1)){
        int temp;
        temp = ca.at(i+1);
        ca.at(i+1) = ca.at(i);
        ca.at(i) = temp;
        flg = true;
      }
    }
    if (flg == false) break;
  }  
   
    int alice = 0;
    int bob = 0;
    
    for (int i = 0; i < N ; i++){
      if ( i % 2 == 0) alice += ca.at(i);
      else bob += ca.at(i);
      }
    } 
    
 cout << alice - bob << endl;
}


Compiler output:
a.cc:35:2: error: 'cout' does not name a type
   35 |  cout << alice - bob << endl;
      |  ^~~~
a.cc:36:1: error: expected declaration before '}' token
   36 | }
      | ^
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class MainB3 {

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

		int N = sc.nextInt();
		int[] a = sc.nextIntArray(N);
		int alice = 0;
		int bob = 0;
		Arrays.sort(a);

		boolean Aflag = true;
		for (int i = N - 1; i >= 0; i--) {
			if (Aflag) {
				 alice += a[i];
			} else {
				bob += a[i];
			}

			Aflag = !Aflag;
		}

		System.out.println(alice - bob);
	}



	static class FastScanner {

		private BufferedReader reader = null;
	    private StringTokenizer tokenizer = null;

	    public FastScanner(InputStream in) {
	        reader = new BufferedReader(new InputStreamReader(in));
	        tokenizer = null;
	    }

	    public String next() {
	        if (tokenizer == null || !tokenizer.hasMoreTokens()) {
	            try {
	                tokenizer = new StringTokenizer(reader.readLine());
	            } catch (IOException e) {
	                throw new RuntimeException(e);
	            }
	        }
	        return tokenizer.nextToken();
	    }

	    public String nextLine() {
	        if (tokenizer == null || !tokenizer.hasMoreTokens()) {
	            try {
	                return reader.readLine();
	            } catch (IOException e) {
	                throw new RuntimeException(e);
	            }
	        }

	        return tokenizer.nextToken("\n");
	    }

	    public long nextLong() {
	        return Long.parseLong(next());
	    }

	    public int nextInt() {
	        return Integer.parseInt(next());
	    }

	    public double nextDouble() {
	         return Double.parseDouble(next());
	     }

	    public int[] nextIntArray(int n) {
	        int[] a = new int[n];
	        for (int i = 0; i < n; i++)
	            a[i] = nextInt();
	        return a;
	    }

	    public long[] nextLongArray(int n) {
	        long[] a = new long[n];
	        for (int i = 0; i < n; i++)
	            a[i] = nextLong();
	        return a;
	    }

	}

}


Compiler output:
Main.java:8: error: class MainB3 is public, should be declared in a file named MainB3.java
public class MainB3 {
       ^
1 error
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:29: error: expected ';' before '{' token
    7 |   sort(a,a+n,greater<int>()){
      |                             ^
      |                             ;
a.cc:15:4: error: expected '}' at end of input
   15 |   }
      |    ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

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

int main(){
  int n,a[100],alice,bob;
  alice =0;
  bob =0;
  cin >> n;
  for(int i=0;i<n;i++){
    cin >> a[i];
  }
  sort(a,a + n,greater<int>());
  int i = 0;
  bool alice = true;
  while(i<n){
    if(alice){
      alice += a[i];
      alice = false;
    }
    else{
      bob += a[i];
      alice = true;
    }
    i++;
  }
  cout << alice -bob << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:8: error: conflicting declaration 'bool alice'
   14 |   bool alice = true;
      |        ^~~~~
a.cc:5:16: note: previous declaration as 'int alice'
    5 |   int n,a[100],alice,bob;
      |                ^~~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:17: error: expected ')' before ';' token
    8 |   sort(c.begin();c.end(),greater<int>());
      |       ~         ^
      |                 )
a.cc:8:23: warning: ignoring return value of 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::end() [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator]', declared with attribute 'nodiscard' [-Wunused-result]
    8 |   sort(c.begin();c.end(),greater<int>());
      |                  ~~~~~^~
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:893:7: note: declared here
  893 |       end() _GLIBCXX_NOEXCEPT
      |       ^~~
a.cc:8:40: error: expected ';' before ')' token
    8 |   sort(c.begin();c.end(),greater<int>());
      |                                        ^
      |                                        ;
Language: C++

#include<iostream>

int main(){
  int N;
  int a[100];

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

  sort(a, a+N, std::greater<int>());
  int c = 0; //Aliceの点数
  int b = 0; //Bobの点数

  for (int i=0; i<N; ++i){
    if (i%2 ==0){
      c += a[i];
    } else {
      b += a[i];
    }
  }

  std::cout << c-b << std::endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |   sort(a, a+N, std::greater<int>());
      |   ^~~~
      |   short
Language: C++

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

int main() {
  int N;
  cin >> N;
  for (int i=0;i<N;i++){
  int M=max()
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: no matching function for call to 'max()'
    8 |   int M=max()
      |         ~~~^~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 0 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 0 provided
a.cc:9:2: error: expected '}' at end of input
    9 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C

n=int(input())
a=list(map(int,input().split()))
a.sort(reverse=True)
print(sum(a[::2])-sum(a[1::2]))

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n=int(input())
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: expected expression before 'int'
    1 | n=int(input())
      |   ^~~
Language: C++

#include <iostream>
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 alice = 0;
    int bob = 0;
    for (int i = 0; i < N; ++i) {
        if (i % 2 == 0) {
            alice += a[i];
        }
        else {
            bob += a[i];
        }
    }
    cout << alice - bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   10 |     sort(a, a + N, greater<int>());
      |     ^~~~
      |     short
Language: C++

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

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

    int a = 0;
    for(int i=0;i<N/2;,i++){
        a += cardset.at(2*i)-cardset.at(2*i+1);
    }
    if (N%2==1){
        a += cardset.at(N-1);
    }

    cout << a << endl;
}




Compiler output:
a.cc:4:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    4 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:15:23: error: expected primary-expression before ',' token
   15 |     for(int i=0;i<N/2;,i++){
      |                       ^
Language: C++

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

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

    int a = 0;
    for(i=0;i<N/2;,i++){
        a += cardset.at(2*i)-cardset.at(2*i+1);
    }
    if (N%2==1){
        a += cardset.at(N-1);
    }

    cout << a << endl;
}




Compiler output:
a.cc:4:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    4 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:15:9: error: 'i' was not declared in this scope
   15 |     for(i=0;i<N/2;,i++){
      |         ^
a.cc:15:19: error: expected primary-expression before ',' token
   15 |     for(i=0;i<N/2;,i++){
      |                   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main () {
	int n;
	cin >> n;
	std::vector<int> v(n);
	for (int i = 0; i < n; ++i)
	{
		cin >> v[i];
	}
	sort(v.begin(), v.end());
    reverse(v.begin(),v.end());
	int sumA = 0;
	int sumB = 0;
	for (int i = 0; i < n; ++i)
	{
		if(i % 2 == 0){
			sumA += v[i];
		}else{
			sumB += v[i];
		}
	}
	cout << sumA - sumB << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:23:37: error: expected '}' at end of input
   23 |         cout << sumA - sumB << endl;
      |                                     ^
a.cc:3:13: note: to match this '{'
    3 | int main () {
      |             ^
Language: C++

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


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

}


Compiler output:
a.cc:3:2: error: invalid preprocessing directive #inclede; did you mean #include?
    3 | #inclede <algorithm>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:16:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   16 |   sort(a,a+N, greater<int>());
      |   ^~~~
      |   short
Language: C++

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


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

}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   15 |   sort(a,a+N, greater<int>());
      |   ^~~~
      |   short
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
   	int N;
    cin >> N;
  	int a[N];
  	int Alice = 0;
  	int Bob = 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 == 0) Alice += a[i];
      else Bob += a[i];
    }
  	
   
    cout << Alice - Bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:8: error: expected primary-expression before 'if'
   14 |       (if i % 2 == 0) Alice += a[i];
      |        ^~
a.cc:14:8: error: expected ')' before 'if'
   14 |       (if i % 2 == 0) Alice += a[i];
      |       ~^~
      |        )
a.cc:15:7: error: 'else' without a previous 'if'
   15 |       else Bob += a[i];
      |       ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: expected ',' or ';' before 'if'
   15 |     if(j % 2 == 1){
      |     ^~
a.cc:18:5: error: 'else' without a previous 'if'
   18 |     else {
      |     ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'j' was not declared in this scope
   14 |     j = i + 1
      |     ^
a.cc:18:5: error: 'else' without a previous 'if'
   18 |     else{
      |     ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'j' was not declared in this scope
   14 |     j = i + 1
      |     ^
a.cc:17:6: error: 'else' without a previous 'if'
   17 |     }else{
      |      ^~~~
a.cc:18:22: error: no match for call to '(std::vector<int>) (int&)'
   18 |       bob = bob + vec(i);
      |                   ~~~^~~
Language: C++

// https://atcoder.jp/contests/abc088/tasks/abc088_b

#include <iostream>
#include <vector>
using namespace std;
#define max(a, b) (((a) > (b)) ? (a) : (b))
#define min(a, b) (((a) < (b)) ? (a) : (b))

int main() {
    int n, a = 0, b = 0;
    vector<int> v;
    cin >> n;
    v.resize(n);

    for (int i = 0; i < n; i++) {
        cin >> v[i];
    }
    // 大きい順にソート
    sort(v.begin(), v.end(), greater<int>());

    for (int i = 0; i < n; i++) {
        if (i % 2 == 0) {
            a += v[i];
        } else {
            b += v[i];
        }
    }
    cout << (a - b) << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   19 |     sort(v.begin(), v.end(), greater<int>());
      |     ^~~~
      |     short
Language: C++

#include <iostream>
#include <algorithm>
using namespace std;
 
int main() {
    int N;
  	int ans = 0;
  	int Alice = 0;
  	int Bob = 0;
  	int max = 0;
  	cin >> N;
  	int a[N];
  	for(int i = 0; i < N; ++i){
      	cin >> a[i];
  	}
  	sort(a, a + N, greater<int>());
 	for(i = 0; i < N; ++i){
		if(i % 2 == 0) Alice += a[i];
      	else Bob += a[i];
    }
  	ans = Alice - Bob;
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:13: error: 'i' was not declared in this scope
   17 |         for(i = 0; i < N; ++i){
      |             ^
Language: C++

#include<iostream>
#include<stdio.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 Alice = 0;
  int Bob = 0;
  for(int i=0;i<N;i++){
    if(i%2 == 0){
      Alice += a[i];
    }
    else{
      Bob += a[i];
    }
  }
  cout << Alice-Bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(a,a+N,greater<int>());
      |   ^~~~
      |   short
Language: C++

#include <iostream>
using namespace std;

int main() {

	//initialize
	int N;
    int A[100];
    int Alice = 0;
    int Bob = 0;

    // input
    cin >> N;
    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 == 0){
    		Alice += A[i];
    	}else{
    		Bob += A[i];
    	}
    }

    cout << Alice - Bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   18 |     sort(A, A+N, greater<int>());
      |     ^~~~
      |     short
a.cc:20:25: error: 'n' was not declared in this scope
   20 |     for (int i = 0; i < n; ++i){
      |                         ^
Language: C++

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

void merge(vector<int> &v, int left, int mid, int right) {
    int len = right - left;
    vector<int> tmp(len);

    int i_tmp = 0, i_left = left, i_right = mid;
    while (i_left < mid and i_right < right) {
        if (v[i_left] <= v[i_right])
            tmp[i_tmp++] = v[i_left++];
        else
            tmp[i_tmp++] = v[i_right++];
    }

    while (i_left < mid) tmp[i_tmp++] = v[i_left++];
    while (i_right < right) tmp[i_tmp++] = v[i_right++];

    for (int i = 0; i < len; ++i)
        v[left + i] = tmp[i];
}

void merge_rec(vector<int> &v, int left, int right) {
    int len = right - left;
    if (len <= 1)
        return;
    
    int mid = left + len / 2;
    merge_rec(v, left, mid);
    merge_rec(v, mid, right);

    merge(v, left, mid, right);
}

void merge_sort(vector<int> &v) {
    merge_rec(v, 0, v.size());
}

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

    int a1 = 0, a2 = 0;
    int id1 = N - 1, int id2 = N - 2;
    while (id1 >= 0) {
        a1 += v[id1];
        id1 -= 2;
    }
    while (id2 >= 0) {
        a2 += v[id2];
        id2 -= 2;
    }
    cout << id1 - id2 << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:22: error: expected unqualified-id before 'int'
   50 |     int id1 = N - 1, int id2 = N - 2;
      |                      ^~~
a.cc:55:12: error: 'id2' was not declared in this scope; did you mean 'id1'?
   55 |     while (id2 >= 0) {
      |            ^~~
      |            id1
a.cc:59:19: error: 'id2' was not declared in this scope; did you mean 'id1'?
   59 |     cout << id1 - id2 << endl;
      |                   ^~~
      |                   id1
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 ALice=0;
  int Bob=0;
  for(int i=0;i<n;++i){
    if(i%2==0){
      Alice += a[i];
    }
    else{
      Bob += a[i];
    }
  }
  cout<<Alice-Bob<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:7: error: 'Alice' was not declared in this scope; did you mean 'ALice'?
   16 |       Alice += a[i];
      |       ^~~~~
      |       ALice
a.cc:22:9: error: 'Alice' was not declared in this scope; did you mean 'ALice'?
   22 |   cout<<Alice-Bob<<endl;
      |         ^~~~~
      |         ALice
Language: C++

#include<iostream>
using namespace std;

int main(){
  int N;
  cin >>N;
  int numbers[N];
  for(int i=0;i<N;i++){
    cin >> numbers[i];
  }
  bool flag;
  int tmp;
  tmp=0;
  while(flag = true){
    flag = false
    for(int i=0;i<N-1,i++){
      if (numbers[i]<numbers[i+1]){
        tmp = numbers[i];
        numbers[i] = numbers[i+1];
        numbers[i+1] = tmp;
        flag = true;
      }
    }
  }
  
  int A,B;
  for(int i =0;i<N;i++){
    if(i%2=0){
      A += N[i];
    }
    else{
      B += N[i];
    }
  }
  cout << A-B;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:17: error: expected ';' before 'for'
   15 |     flag = false
      |                 ^
      |                 ;
   16 |     for(int i=0;i<N-1,i++){
      |     ~~~          
a.cc:16:17: error: 'i' was not declared in this scope
   16 |     for(int i=0;i<N-1,i++){
      |                 ^
a.cc:28:9: error: lvalue required as left operand of assignment
   28 |     if(i%2=0){
      |        ~^~
a.cc:29:13: error: invalid types 'int[int]' for array subscript
   29 |       A += N[i];
      |             ^
a.cc:32:13: error: invalid types 'int[int]' for array subscript
   32 |       B += N[i];
      |             ^
Language: C++

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

int main(){
    int N,A,B,ans;
    cin >> N;
    vector<int> vec(N);
        for (int i=0; i<N; i++){
            cin >> vec.at(i);
        }
    sort(a, a + N, greater<int>());
    for (int i=0; i<N; i++){
        if (i%2==0) A += vec.at(i);
        else B += vec.at(i);
    }
    ans = A-B;
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:10: error: 'a' was not declared in this scope
   13 |     sort(a, a + N, greater<int>());
      |          ^
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'vector' was not declared in this scope
    8 |     vector<int> vec(N);
      |     ^~~~~~
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:8:12: error: expected primary-expression before 'int'
    8 |     vector<int> vec(N);
      |            ^~~
a.cc:10:20: error: 'vec' was not declared in this scope
   10 |             cin >> vec.at(i);
      |                    ^~~
a.cc:12:11: error: 'vec' was not declared in this scope
   12 |     sort (vec.begin(),vec.end());
      |           ^~~
Language: C++

#include <iostream>
#include <algorithm>

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: 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:7:5: error: 'vector' was not declared in this scope
    7 |     vector<int> vec(N);
      |     ^~~~~~
a.cc:7:12: error: expected primary-expression before 'int'
    7 |     vector<int> vec(N);
      |            ^~~
a.cc:9:20: error: 'vec' was not declared in this scope
    9 |             cin >> vec.at(i);
      |                    ^~~
a.cc:11:11: error: 'vec' was not declared in this scope
   11 |     sort (vec.begin(),vec.end());
      |           ^~~
a.cc:11:5: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
   11 |     sort (vec.begin(),vec.end());
      |     ^~~~
      |     std::sort
In file included from /usr/include/c++/14/algorithm:86,
                 from a.cc:2:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note: 'std::sort' declared here
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
a.cc:12:5: error: 'reverse' was not declared in this scope; did you mean 'std::reverse'?
   12 |     reverse (vec.begin(),vec.end());
      |     ^~~~~~~
      |     std::reverse
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note: 'std::reverse' declared here
  249 | reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last);
      | ^~~~~~~
a.cc:18:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   18 |     cout << ans << endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:18:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   18 |     cout << ans << endl;
      |                    ^~~~
      |                    std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

### coding: UTF-8

#import math
#import random as rd
#import numpy as np


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

line=sorted(line)

#print(line)

s=sum([line[-(i+1)] for i in range(n) if i%2==0])-sum([line[-(i+1)] for i in range(n) if i%2!=0])

print(s)



Compiler output:
a.cc:1:1: error: stray '##' in program
    1 | ### coding: UTF-8
      | ^~
a.cc:1:3: error: stray '#' in program
    1 | ### coding: UTF-8
      |   ^
a.cc:3:2: warning: #import is a deprecated GCC extension [-Wdeprecated]
    3 | #import math
      |  ^~~~~~
a.cc:3:9: error: #import expects "FILENAME" or <FILENAME>
    3 | #import math
      |         ^~~~
a.cc:4:2: warning: #import is a deprecated GCC extension [-Wdeprecated]
    4 | #import random as rd
      |  ^~~~~~
a.cc:4:9: error: #import expects "FILENAME" or <FILENAME>
    4 | #import random as rd
      |         ^~~~~~
a.cc:5:2: warning: #import is a deprecated GCC extension [-Wdeprecated]
    5 | #import numpy as np
      |  ^~~~~~
a.cc:5:9: error: #import expects "FILENAME" or <FILENAME>
    5 | #import numpy as np
      |         ^~~~~
a.cc:13:2: error: invalid preprocessing directive #print
   13 | #print(line)
      |  ^~~~~
a.cc:1:11: error: found ':' in nested-name-specifier, expected '::'
    1 | ### coding: UTF-8
      |           ^
      |           ::
a.cc:1:5: error: 'coding' does not name a type
    1 | ### coding: UTF-8
      |     ^~~~~~
Language: C++

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

  vector<int> vec(N);
  for (int i = 0; i < N; i++) {
    cin >> vec.at(i);
  }
  
  sort(vec.begin(), vec.end());
  int a = 0;
  int b = 0;

  for (int i = 0; i < vec.size(); i++) {
    if (i % 2 == 0){
      a += vec.at(i);
    }else{
      b += vec.at(i);
    }
  }
  
  cout << a - b;
  



Compiler output:
a.cc: In function 'int main()':
a.cc:5:11: error: cannot convert 'std::istream' {aka 'std::basic_istream<char>'} to 'int' in initialization
    5 |   int N = cin;
      |           ^~~
      |           |
      |           std::istream {aka std::basic_istream<char>}
a.cc:24:17: error: expected '}' at end of input
   24 |   cout << a - b;
      |                 ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:14:21: error: 'daga' was not declared in this scope; did you mean 'data'?
   14 |   sort(data.begin(),daga.end());
      |                     ^~~~
      |                     data
a.cc:15:10: error: no matching function for call to 'reverse(std::vector<int>&)'
   15 |   reverse(data);
      |   ~~~~~~~^~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h:1083:5: note: candidate: 'template<class _BIter> void std::reverse(_BIter, _BIter)'
 1083 |     reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
      |     ^~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1083:5: note:   candidate expects 2 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note: candidate: 'template<class _ExecutionPolicy, class _BidirectionalIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::reverse(_ExecutionPolicy&&, _BidirectionalIterator, _BidirectionalIterator)'
  249 | reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last);
      | ^~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note:   candidate expects 3 arguments, 1 provided
Language: C++

#include<iostream>
using namespace std;

int N;
int main(){
    int A[101];
    cin >> N;
    for (int i = 0; i < N; ++i) cin >> A[i];
    sort(A, A + N, greater<int>());
    int total = 0;
    int Alice=0;
    int Bob = 0;
    for(int i = 0; i<=N;++i){
        if(i%2==0){
            Alice += A[i];
        }else{
            Bob +=A[i];
        }
    }
    int t =0;
    t = Alice - Bob;
    cout << t << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'sort' was not declared in this scope; did you mean 'short'?
    9 |     sort(A, A + N, greater<int>());
      |     ^~~~
      |     short
Language: C++

#include<bits/stdc++.h>
#include<algorithm>

using namespace std;
int main(){
  int a,b=0,c=0,i;
  vector<int> p(110)
  cin>>a;
  for(i=0;i<a;i++){
    cin>>p.at(i);
  sort(p.begin(),p.end());
  reverse(p.begin(),p.end());
  }
  for(i=0;i<a;i+=2){
    b+=p.at(i);
   }
  for(i=1;i<a;i+=2){
    c+=p.at(i);
  }
  cout<<b-c<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected ',' or ';' before 'cin'
    8 |   cin>>a;
      |   ^~~
Language: C++

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

using namespace std;
int main(){
  int a,b=0,c=0,i;
  vector<int> p(110)
  cin>>a;
  for(i=0;i<a;i++){
    cin>>p.at(i);
  sort(p.begin(),p.end());
  reverse(p.begin(),p.end());
  }
  for(i=0;i<a;i+=2){
    b+=p.at(i);
   }
  for(i=1;i<a;i+=2){
    c+=p.at(i);
  }
  cout<<b-c<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: expected ',' or ';' before 'cin'
    9 |   cin>>a;
      |   ^~~
Language: C++

#include<iostream>
#include<algorithm>
#include<functional>
vector<int> p(110);

using namespace std;
int main(){
  int a,b=0,c=0,i;
  cin>>a;
  for(i=0;i<a;i++){
    cin>>p.at(i);
  sort(p.begin(),p.end());
  reverse(p.begin(),p.end());
  }
  for(i=0;i<a;i+=2){
    b+=p.at(i);
   }
  for(i=1;i<a;i+=2){
    c+=p.at(i);
  }
  cout<<b-c<<endl;
}


Compiler output:
a.cc:4:1: error: 'vector' does not name a type
    4 | vector<int> p(110);
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:11:10: error: 'p' was not declared in this scope
   11 |     cin>>p.at(i);
      |          ^
a.cc:16:8: error: 'p' was not declared in this scope
   16 |     b+=p.at(i);
      |        ^
a.cc:19:8: error: 'p' was not declared in this scope
   19 |     c+=p.at(i);
      |        ^
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int p[110];

int main(){
  int a,b=0,c=0,i;
  cin>>a;
  for(i=0;i<a;i++){
    cin>>p[i];
  sort(p.begin(),p.end());
  reverse(p.begin(),p.end());
  }
  for(i=0;i<a;i+=2){
    b+=p[i];
   }
  for(i=1;i<a;i+=2){
    c+=p[i];
  }
  cout<<b-c<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:10: error: request for member 'begin' in 'p', which is of non-class type 'int [110]'
   11 |   sort(p.begin(),p.end());
      |          ^~~~~
a.cc:11:20: error: request for member 'end' in 'p', which is of non-class type 'int [110]'
   11 |   sort(p.begin(),p.end());
      |                    ^~~
a.cc:12:13: error: request for member 'begin' in 'p', which is of non-class type 'int [110]'
   12 |   reverse(p.begin(),p.end());
      |             ^~~~~
a.cc:12:23: error: request for member 'end' in 'p', which is of non-class type 'int [110]'
   12 |   reverse(p.begin(),p.end());
      |                       ^~~
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int p[110]

int main(){
  int a,b=0,c=0,i;
  cin>>a;
  for(i=0;i<a;i++){
    cin>>p[i];
  sort(p.begin(),p.end());
  reverse(p.begin(),p.end());
  }
  for(i=0;i<a;i+=2){
    b+=p[i];
   }
  for(i=1;i<a;i+=2){
    c+=p[i];
  }
  cout<<b-c<<endl;
}


Compiler output:
a.cc:6:1: error: expected initializer before 'int'
    6 | int main(){
      | ^~~
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main(){
  int a,b=0,c=0,i;
  cin>>a;
  int p[110];
  for(i=0;i<a;i++){
    cin>>p.at(i);
  sort(p.begin(),p.end());
  reverse(p.begin(),p.end());
  }
  for(i=0;i<a;i+=2){
    b+=p.at(i);
   }
  for(i=1;i<a;i+=2){
    c+=p.at(i);
  }
  cout<<b-c<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: request for member 'at' in 'p', which is of non-class type 'int [110]'
    9 |     cin>>p.at(i);
      |            ^~
a.cc:10:10: error: request for member 'begin' in 'p', which is of non-class type 'int [110]'
   10 |   sort(p.begin(),p.end());
      |          ^~~~~
a.cc:10:20: error: request for member 'end' in 'p', which is of non-class type 'int [110]'
   10 |   sort(p.begin(),p.end());
      |                    ^~~
a.cc:11:13: error: request for member 'begin' in 'p', which is of non-class type 'int [110]'
   11 |   reverse(p.begin(),p.end());
      |             ^~~~~
a.cc:11:23: error: request for member 'end' in 'p', which is of non-class type 'int [110]'
   11 |   reverse(p.begin(),p.end());
      |                       ^~~
a.cc:14:10: error: request for member 'at' in 'p', which is of non-class type 'int [110]'
   14 |     b+=p.at(i);
      |          ^~
a.cc:17:10: error: request for member 'at' in 'p', which is of non-class type 'int [110]'
   17 |     c+=p.at(i);
      |          ^~
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main(){
  int a,b=0,c=0,i;
  cin>>a;
  int p[110];
  for(i=0;i<a;i++){
    cin>>p.at(i);
  }
  sort(p.begin(),p.end());
  reverse(p.begin(),p.end());
  for(i=0;i<a;i+=2){
    b+=p.at(i);
   }
  for(i=1;i<a;i+=2){
    c+=p.at(i);
  }
  cout<<b-c<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: request for member 'at' in 'p', which is of non-class type 'int [110]'
    9 |     cin>>p.at(i);
      |            ^~
a.cc:11:10: error: request for member 'begin' in 'p', which is of non-class type 'int [110]'
   11 |   sort(p.begin(),p.end());
      |          ^~~~~
a.cc:11:20: error: request for member 'end' in 'p', which is of non-class type 'int [110]'
   11 |   sort(p.begin(),p.end());
      |                    ^~~
a.cc:12:13: error: request for member 'begin' in 'p', which is of non-class type 'int [110]'
   12 |   reverse(p.begin(),p.end());
      |             ^~~~~
a.cc:12:23: error: request for member 'end' in 'p', which is of non-class type 'int [110]'
   12 |   reverse(p.begin(),p.end());
      |                       ^~~
a.cc:14:10: error: request for member 'at' in 'p', which is of non-class type 'int [110]'
   14 |     b+=p.at(i);
      |          ^~
a.cc:17:10: error: request for member 'at' in 'p', which is of non-class type 'int [110]'
   17 |     c+=p.at(i);
      |          ^~
Language: C++

#include<bits/stdc++.h>
#include<algorithm>
using namespace std;
int main(){
  int a,i;
  cin>>a;
  vector<int> point;
  for(i=0;i<a;i++){
    cin>>point.at(i);
  }
  sort(point.begin(),point.end());
  reverse(point.begin(),point.end());
  int b,c,d;
  for(i=1;i<=a;i++){
    if(i%2==1){
      b+=point.at(i-1);
    }
    else{
      c+=point.at(i-1)
    }
    cout<<b-c<<endl;
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:23: error: expected ';' before '}' token
   19 |       c+=point.at(i-1)
      |                       ^
      |                       ;
   20 |     }
      |     ~
Language: C++

#include<bits/stdc++.h>
#include<algorithm>
using namespace std;
int main(){
  int a,i;
  cin>>a;
  vector<int> point;
  for(i=0;i<a;i++){
    cin>>point.at(i);
  }
  sort(point.begin(),point.end());
  reverse(point.begin(),point.end());
  int b,c,d;
  for(i=1;i<=a;i++){
    if(i%2==1){
      b+=point.at(i-1)
    }
    else{
      c+=point.at(i-1)
    }
    cout<<b-c<<endl;
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:23: error: expected ';' before '}' token
   16 |       b+=point.at(i-1)
      |                       ^
      |                       ;
   17 |     }
      |     ~                  
a.cc:19:23: error: expected ';' before '}' token
   19 |       c+=point.at(i-1)
      |                       ^
      |                       ;
   20 |     }
      |     ~
Language: C++

#include<iostream>
#include<algorithm>
#inclume<vector>
using namespace std;
int main(){
  int a,i;
  cin>>a;
  vector<int> point;
  for(i=0;i<a;i++){
    cin>>point.at(i);
  }
  sort(point.begin(),point.end());
  reverse(point.begin(),point.end());
  int b,c,d;
  for(i=1;i<=a;i++){
    if(i%2==1){
      b+=point.at(i-1)
    }
    else{
      c+=point.at(i-1)
    }
    cout<<b-c<<endl;
  }
  
}

Compiler output:
a.cc:3:2: error: invalid preprocessing directive #inclume; did you mean #include?
    3 | #inclume<vector>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:8:3: error: 'vector' was not declared in this scope
    8 |   vector<int> point;
      |   ^~~~~~
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 | #inclume<vector>
a.cc:8:10: error: expected primary-expression before 'int'
    8 |   vector<int> point;
      |          ^~~
a.cc:10:10: error: 'point' was not declared in this scope
   10 |     cin>>point.at(i);
      |          ^~~~~
a.cc:12:8: error: 'point' was not declared in this scope
   12 |   sort(point.begin(),point.end());
      |        ^~~~~
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main(){
  int a,i;
  cin>>a;
  vector<int> point;
  for(i=0;i<a;i++){
    cin>>point.at(i);
  }
  sort(point.begin(),point.end());
  reverse(point.begin(),point.end());
  int b,c,d;
  for(i=1;i<=a;i++){
    if(i%2==1){
      b+=point.at(i-1)
    }
    else{
      c+=point.at(i-1)
    }
    cout<<b-c<<endl;
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'vector' was not declared in this scope
    7 |   vector<int> point;
      |   ^~~~~~
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> point;
      |          ^~~
a.cc:9:10: error: 'point' was not declared in this scope
    9 |     cin>>point.at(i);
      |          ^~~~~
a.cc:11:8: error: 'point' was not declared in this scope
   11 |   sort(point.begin(),point.end());
      |        ^~~~~
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |   sort(a.begin(), a.end(), greater<int>());
      |   ^~~~
      |   short
Language: C++

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

sort_list = sorted(a)
rev_list = list(reversed(sort_list))

alice_sum = 0
bob_sum = 0

alice = rev_list[::2]
bob = rev_list[1::2]

for i in alice:
    alice_sum += i
for i in bob:
    bob_sum += i

ans = alice_sum - bob_sum

print(ans)





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