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

#include <iostream>
#include <vector>

using namespace std;

int main() {

    int N;
    cin >> N;

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

    std::sort(a.begin(), a.end(), greater<int>());

    int total_alice = 0;
    int total_bob = 0;

    for (int i = 0; i < a.size(); i+=2) total_alice += a[i];
    for (int i = 1; i < a.size(); i+=2) total_bob += a[i];


    cout << total_alice - total_bob << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:10: error: 'sort' is not a member of 'std'; did you mean 'qsort'?
   14 |     std::sort(a.begin(), a.end(), greater<int>());
      |          ^~~~
      |          qsort
Language: C++

#include <iostream>
#include <vector>

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(), greater<int>());

    int total_alice = 0;
    int total_bob = 0;

    for (int i = 0; i < a.size(); i+=2) total_alice += a[i];
    for (int i = 1; i < a.size(); i+=2) total_bob += a[i];


    cout << total_alice - total_bob << endl;

}

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

#include<iostream>
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);
	int A=0,B=0;
	for(int i=n-1;i>=0;i-=2) A+=a[i];
	for(int i=n-2;i>=0;i-=2) B+=a[i];
	
	cout<<A-B<<endl;
	
	return 0;
}


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

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

int main(){
  int N, count1 = 0, count2 = 0, ans;
  vector<int> vec(N);
  cin >> 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){
    count1 += vec.at(i);
  }
  for(int i=1;i < N;i+=2){
    count2 += vec.at(i);
  }
  ans = count1 - count2
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:24: error: expected ';' before 'cout'
   19 |   ans = count1 - count2
      |                        ^
      |                        ;
   20 |   cout << ans << endl;
      |   ~~~~
Language: C++

#include <iostream>
using namespace std;

int main(){
  int N, count1 = 0, count2 = 0, ans;
  vector<int> vec(N);
  cin >> 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){
    count1 += vec.at(i);
  }
  for(int i=1;i < N;i+=2){
    count2 += vec.at(i);
  }
  ans = count1 - count2
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'vector' was not declared in this scope
    6 |   vector<int> vec(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:6:10: error: expected primary-expression before 'int'
    6 |   vector<int> vec(N);
      |          ^~~
a.cc:9:12: error: 'vec' was not declared in this scope
    9 |     cin >> vec.at(i);
      |            ^~~
a.cc:11:8: error: 'vec' was not declared in this scope
   11 |   sort(vec.begin(),vec.end());
      |        ^~~
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(vec.begin(),vec.end());
      |   ^~~~
      |   short
a.cc:12:3: error: 'reverse' was not declared in this scope
   12 |   reverse(vec.begin(),vec.end());
      |   ^~~~~~~
a.cc:19:24: error: expected ';' before 'cout'
   19 |   ans = count1 - count2
      |                        ^
      |                        ;
   20 |   cout << ans << endl;
      |   ~~~~
Language: C++

#include <iostream>
using namespace std;

int main(){
  int N, count1 = 0, count2 = 0, ans;
  vector<int> vec(N);
  cin >> N;
  for(int i=0;i<N;i++){
    cin >> vec[i];
  }
  sort(vec.begin(),vec.end())
  reverse(vec.begin(),vec.end())
  for(int i=0;i < N;i+=2){
    count1 += vec[i];
  }
  for(int i=1;i < N;i+=2){
    count2 += vec[i]
  }
  ans = count1 - count2
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'vector' was not declared in this scope
    6 |   vector<int> vec(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:6:10: error: expected primary-expression before 'int'
    6 |   vector<int> vec(N);
      |          ^~~
a.cc:9:12: error: 'vec' was not declared in this scope
    9 |     cin >> vec[i];
      |            ^~~
a.cc:11:8: error: 'vec' was not declared in this scope
   11 |   sort(vec.begin(),vec.end())
      |        ^~~
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(vec.begin(),vec.end())
      |   ^~~~
      |   short
a.cc:13:15: error: 'i' was not declared in this scope
   13 |   for(int i=0;i < N;i+=2){
      |               ^
a.cc:19:24: error: expected ';' before 'cout'
   19 |   ans = count1 - count2
      |                        ^
      |                        ;
   20 |   cout << ans << endl;
      |   ~~~~
Language: C++

#include <iostream>
using namespace std;

int main(){
  int N, count1 = 0, count2 = 0;
  vector<int> vec(N);
  cin >> N;
  for(int i=0;i<N;i++){
    cin >> vec[i];
  }
  sort(vec.begin(),vec.end())
  reverse(vec.begin(),vec.end())
  for(int i=0;i<N;i+=2){
    count1 += vec[i];
  }
  for(int i=1;i<N;i+=2){
    count2 += vec[i]
  }
  cout << count1 - count2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'vector' was not declared in this scope
    6 |   vector<int> vec(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:6:10: error: expected primary-expression before 'int'
    6 |   vector<int> vec(N);
      |          ^~~
a.cc:9:12: error: 'vec' was not declared in this scope
    9 |     cin >> vec[i];
      |            ^~~
a.cc:11:8: error: 'vec' was not declared in this scope
   11 |   sort(vec.begin(),vec.end())
      |        ^~~
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(vec.begin(),vec.end())
      |   ^~~~
      |   short
a.cc:13:15: error: 'i' was not declared in this scope
   13 |   for(int i=0;i<N;i+=2){
      |               ^
Language: C++

#include <iostream>
using namespace std;

int main(){
  int N, count1, count2;
  vector<int> vec;
  cin >> N;
  for(int i=0;i<N;i++){
    cin >> vec[i];
  }
  sort(vec.begin(),vec.end())
  reverse(vec.begin(),vec.end())
  for(int i=0;i<N;i+=2){
    count1 += vec[i];
  }
  for(int i=1;i<N;i+=2){
    count2 += vec[i]
  }
  cout << count1 - count2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'vector' was not declared in this scope
    6 |   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:6:10: error: expected primary-expression before 'int'
    6 |   vector<int> vec;
      |          ^~~
a.cc:9:12: error: 'vec' was not declared in this scope
    9 |     cin >> vec[i];
      |            ^~~
a.cc:11:8: error: 'vec' was not declared in this scope
   11 |   sort(vec.begin(),vec.end())
      |        ^~~
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(vec.begin(),vec.end())
      |   ^~~~
      |   short
a.cc:13:15: error: 'i' was not declared in this scope
   13 |   for(int i=0;i<N;i+=2){
      |               ^
Language: C++

#include <iostream>
using namespace std;

int main(){
  int N, count1, count2;
  vector<int> vec;
  cin >> N;
  for(i=0;i<N;i++){
    cin >> vec[i];
  }
  sort(vec.begin(),vec.end())
  reverse(vec.begin(),vec.end())
  for(i=0;i<N;i+=2){
    count1 += vec[i];
  }
  for(i=1;i<N;i+=2){
    count2 += vec[i]
  }
  cout << count1 - count2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'vector' was not declared in this scope
    6 |   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:6:10: error: expected primary-expression before 'int'
    6 |   vector<int> vec;
      |          ^~~
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   for(i=0;i<N;i++){
      |       ^
a.cc:9:12: error: 'vec' was not declared in this scope
    9 |     cin >> vec[i];
      |            ^~~
a.cc:11:8: error: 'vec' was not declared in this scope
   11 |   sort(vec.begin(),vec.end())
      |        ^~~
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(vec.begin(),vec.end())
      |   ^~~~
      |   short
a.cc:13:11: error: 'i' was not declared in this scope
   13 |   for(i=0;i<N;i+=2){
      |           ^
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);
  
  sort(A.begin(), A.end(), [](const int x, const int y){return x > y});
  
  int score1 = 0;
  int score2 = 0;
  for(int i = 0; i < N; i+=2) 
  	score1 += A.at(i);
  for(int i = 1; i < N; i+=2) 
  	score2 += A.at(i);
  cout << score1 - score2 << endl;
  
}

Compiler output:
a.cc: In lambda function:
a.cc:11:69: error: expected ';' before '}' token
   11 |   sort(A.begin(), A.end(), [](const int x, const int y){return x > y});
      |                                                                     ^
      |                                                                     ;
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);
  
　sort(A.begin(), A.end(), std::greater<int>());
  
  int score1 = 0;
  int score2 = 0;
  for(int i = 0; i < N; i+=2) 
  	score1 += A.at(i);
  for(int i = 1; i < N; i+=2) 
  	score2 += A.at(i);
  cout << score1 - score2 << endl;
  
}

Compiler output:
a.cc:11:1: error: extended character 　 is not valid in an identifier
   11 | 　sort(A.begin(), A.end(), std::greater<int>());
      | ^
a.cc: In function 'int main()':
a.cc:11:1: error: '\U00003000sort' was not declared in this scope; did you mean 'qsort'?
   11 | 　sort(A.begin(), A.end(), std::greater<int>());
      | ^~~~~~
      | qsort
Language: Java

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

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in);) {
            new Main().solve(sc);
        }
    }

    void solve(Scanner sc) {
        int n = sc.nextInt();
        int alice = 0;
        int bob = 0;
        int[] as = new int[n];
        for (int i = 0; i < max; i++) {
            as[i] = sc.nextInt();
        }
        Arrays.sort(as);
        boolean a = true;
        for (int i = n - 1; i >= 0; i--) {
            if (a) {
                alice += as[i];
                a = false;
            } else {
                bob += as[i];
                a = true;
            }
        }
        System.out.println(alice - bob);
    }
}

Compiler output:
Main.java:16: error: cannot find symbol
        for (int i = 0; i < max; i++) {
                            ^
  symbol:   variable max
  location: class Main
1 error
Language: C++

#include <iostream>
#include <algorithm>
#include <functional>
#include <vector>
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(), greater<int>());
  int ans = 0;
  for (int i = 0; i < n; i++) i % 2 ? ans -= a[i] : ans += a[i];
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:23: error: 'n' was not declared in this scope
   11 |   for (int i = 0; i < n; i++) cin >> a[i];
      |                       ^
a.cc:14:23: error: 'n' was not declared in this scope
   14 |   for (int i = 0; i < n; i++) i % 2 ? ans -= a[i] : ans += a[i];
      |                       ^
Language: C++

#include<iostream>
#include<vector>
#include<math.h>
#include<string>
using namespace std;

int main(){
    int i;
    int N;
    int ans;

    cerr << "Input N" << endl;
    cin >> N;

    vector<double> a(N*N);

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

    std::sort(a.begin(),a.end(),std::greater<int>());

    for(i=0;i<N;i=i+2){
        ans += a[i];
        ans -= a[i+1];
    }

    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:10: error: 'sort' is not a member of 'std'; did you mean 'sqrt'?
   21 |     std::sort(a.begin(),a.end(),std::greater<int>());
      |          ^~~~
      |          sqrt
Language: C++

#include<iostream>
#include<vector>
#include<math.h>
#include<string>
using namespace std;

int main(){
    int i;
    int N;
    int ans;

    cerr << "Input N" << endl;
    cin >> N;

    vector<double> a(N*N);

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

    sort(a.begin(),a.end(),greater<int>());

    for(i=0;i<N;i=i+2){
        ans += a[i];
        ans -= a[i+1];
    }

    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   21 |     sort(a.begin(),a.end(),greater<int>());
      |     ^~~~
      |     sqrt
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:19:19: error: expected '}' at end of input
   19 |   cout<<A-B<<endl;
      |                   ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <iostream>
using namespace std;

int main()
{
    int N;
    int a[N+1];

    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;

    return 0;
}

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

#include <iostream>
using namespace std;

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

    cin >> N;

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

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

    int A = 0;
    int B = 0;

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

    cout << A - B << endl;

    return 0;
}

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

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

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

    cin >> N;

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

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

    int A = 0;
    int B = 0;

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

    int ans;
    ans = A - B;

    cout << ans << endl;

    return 0;
}

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

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

int main() {
  int a,b,num1,num2;
  num1=num2=0;
  vector<int> v;
  cin >> a;
  for(int i=0;i<a;i++){
  	cin>>b;
    v.push_back(b);
  }
  sort(v.begin(),v.end(),greater<int>());//降順ソート
  for(int i=0; i < v.size(); i++){
  	if(i%2==0){
  	  num1+=v.at(i);
    }else{
  	  num2+=v.at(i);
  	}
  }

  cout << num1-num2 <<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(v.begin(),v.end(),greater<int>());//降順ソート
      |   ^~~~
      |   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 scoreA, scoreB;
  for(int i=0;i<N;){
    scoreA = scoreA + num.at(i);
    i++;
    if(i<n){
    scoreB = scoreB + num.at(i);
    i++;
    }
  }
  int r = scoreA - scoreB;
  cout << r << endl;
}

    
    
    
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:18:10: error: 'n' was not declared in this scope
   18 |     if(i<n){
      |          ^
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 scoreA, scoreB;
  for(int i=0;i<n;){
    scoreA = scoreA + num.at(i);
    i++;
    scoreB = scoreB + num.at(i);
    i++;
  }
  int r = scoreA - scoreB;
  cout << r << endl;
}

    
    
    
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:7:22: error: 'n' was not declared in this scope
    7 |   for(int i = 0; i < n; i++){
      |                      ^
a.cc:14:17: error: 'n' was not declared in this scope
   14 |   for(int i=0;i<n;){
      |                 ^
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, grater<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:11:20: error: 'grater' was not declared in this scope
   11 |     sort(a, a + N, grater<int>() );
      |                    ^~~~~~
a.cc:11:27: error: expected primary-expression before 'int'
   11 |     sort(a, a + N, grater<int>() );
      |                           ^~~
Language: Java

import java.util.*;
 import java.util.Comparator;
 
public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    List<Integer> list = new ArrayList<Integer>();
    
    for(int i=0; i<N;i++){
      list.add(sc.nextInt());
    }
    
    list.sort(Comparator.naturalOrder());
    
    int alice_sum = 0;
    int bob_sum = 0;
    int count = 0;
    for(int i=N;i<N;i--){
      if (count % 2 == 0){
        alice_sum += list[i];
      }
      else
      {
        bob_sum += list[i];
      }
      count++;
    }
    
    System.out.println(alice_sum-bob_sum);
  }
}

Compiler output:
Main.java:23: error: array required, but List<Integer> found
        alice_sum += list[i];
                         ^
Main.java:27: error: array required, but List<Integer> found
        bob_sum += list[i];
                       ^
2 errors
Language: Java

import java.util.*;
 import java.util.Comparator;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    int[] numlist = new int[N];
    
    for(int i=0; i<N;i++){
      numlist[i] = sc.nextInt();
    }
    
    Arrays.sort(numlist, Comparator.naturalOrder());
    
    int alice_sum = 0;
    int bob_sum = 0;
    int count = 0;
    for(int i=N;i<N;i--){
      if (count % 2 == 0){
        alice_sum += numlist[i];
      }
      else
      {
        bob_sum += numlist[i];
      }
      count++;
    }
    
    System.out.println(alice_sum-bob_sum);
  }
}

Compiler output:
Main.java:16: error: no suitable method found for sort(int[],Comparator<T#1>)
    Arrays.sort(numlist, Comparator.naturalOrder());
          ^
    method Arrays.<T#2>sort(T#2[],Comparator<? super T#2>) is not applicable
      (inference variable T#2 has incompatible bounds
        equality constraints: int
        upper bounds: Object)
    method Arrays.<T#3>sort(T#3[],int,int,Comparator<? super T#3>) is not applicable
      (cannot infer type-variable(s) T#3
        (actual and formal argument lists differ in length))
  where T#1,T#2,T#3 are type-variables:
    T#1 extends Comparable<? super T#1>
    T#2 extends Object declared in method <T#2>sort(T#2[],Comparator<? super T#2>)
    T#3 extends Object declared in method <T#3>sort(T#3[],int,int,Comparator<? super T#3>)
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error
Language: Java

import java.util.*;
 
public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    int[] numlist = new int[N];
    
    for(int i=0; i<N;i++){
      numlist[i] = sc.nextInt();
    }
    
    Arrays.sort(numlist, Comparator.naturalOrder());
    
    int alice_sum = 0;
    int bob_sum = 0;
    int count = 0;
    for(int i=0;i<N;i++){
      if (count % 2 == 0){
        alice_sum += numlist[i];
      }
      else
      {
        bob_sum += numlist[i];
      }
      count++;
    }
    
    System.out.println(alice_sum-bob_sum);
  }
}

Compiler output:
Main.java:15: error: no suitable method found for sort(int[],Comparator<T#1>)
    Arrays.sort(numlist, Comparator.naturalOrder());
          ^
    method Arrays.<T#2>sort(T#2[],Comparator<? super T#2>) is not applicable
      (inference variable T#2 has incompatible bounds
        equality constraints: int
        upper bounds: Object)
    method Arrays.<T#3>sort(T#3[],int,int,Comparator<? super T#3>) is not applicable
      (cannot infer type-variable(s) T#3
        (actual and formal argument lists differ in length))
  where T#1,T#2,T#3 are type-variables:
    T#1 extends Comparable<? super T#1>
    T#2 extends Object declared in method <T#2>sort(T#2[],Comparator<? super T#2>)
    T#3 extends Object declared in method <T#3>sort(T#3[],int,int,Comparator<? super T#3>)
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    int[] numlist = new int[N];
    
    for(int i=0; i<N;i++){
      numlist[i] = sc.nextInt();
    }
    
    Arrays.sort(numlist, Comparator.reverseOrder());
    
    int alice_sum = 0;
    int bob_sum = 0;
    for(int i=0;i<N;i++){
      if (i % 2 == 0){
        alice_sum += numlist[i];
      }
      else
      {
        bob_sum += numlist[i];
      }
    }
    
    System.out.println(alice_sum-bob_sum);
  }
}

      
      
  

Compiler output:
Main.java:15: error: no suitable method found for sort(int[],Comparator<T#1>)
    Arrays.sort(numlist, Comparator.reverseOrder());
          ^
    method Arrays.<T#2>sort(T#2[],Comparator<? super T#2>) is not applicable
      (inference variable T#2 has incompatible bounds
        equality constraints: int
        upper bounds: Object)
    method Arrays.<T#3>sort(T#3[],int,int,Comparator<? super T#3>) is not applicable
      (cannot infer type-variable(s) T#3
        (actual and formal argument lists differ in length))
  where T#1,T#2,T#3 are type-variables:
    T#1 extends Comparable<? super T#1>
    T#2 extends Object declared in method <T#2>sort(T#2[],Comparator<? super T#2>)
    T#3 extends Object declared in method <T#3>sort(T#3[],int,int,Comparator<? super T#3>)
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    int[] numlist = Integer[N];
    
    for(int i=0; i<N;i++){
      numlist[i] = sc.nextInt();
    }
    
    Arrays.sort(numlist, Collections.reverseOrder());
    
    int alice_sum = 0;
    int bob_sum = 0;
    for(int i=0;i<N;i++){
      if (i % 2 == 0){
        alice_sum += numlist[i];
      }
      else
      {
        bob_sum += numlist[i];
      }
    }
    
    System.out.println(alice_sum-bob_sum);
  }
}

      
      
  

Compiler output:
Main.java:9: error: cannot find symbol
    int[] numlist = Integer[N];
                    ^
  symbol:   variable Integer
  location: class Main
Main.java:15: error: no suitable method found for sort(int[],Comparator<Object>)
    Arrays.sort(numlist, Collections.reverseOrder());
          ^
    method Arrays.<T#1>sort(T#1[],Comparator<? super T#1>) is not applicable
      (inference variable T#1 has incompatible bounds
        equality constraints: int
        upper bounds: Object)
    method Arrays.<T#2>sort(T#2[],int,int,Comparator<? super T#2>) is not applicable
      (cannot infer type-variable(s) T#2
        (actual and formal argument lists differ in length))
  where T#1,T#2 are type-variables:
    T#1 extends Object declared in method <T#1>sort(T#1[],Comparator<? super T#1>)
    T#2 extends Object declared in method <T#2>sort(T#2[],int,int,Comparator<? super T#2>)
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
2 errors
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    int[] numlist = new Integer[N];
    
    for(int i=0; i<N;i++){
      numlist[i] = sc.nextInt();
    }
    
    Arrays.sort(numlist, Collections.reverseOrder());
    int alice_sum = 0;
    int bob_sum = 0;
    for(int i=0;i<N;i++){
      if (i % 2 == 0){
        alice_sum += numlist[i];
      }
      else
      {
        bob_sum += numlist[i];
      }
    }
    
    System.out.println(alice_sum-bob_sum);
  }
}

      
      
  

Compiler output:
Main.java:9: error: incompatible types: Integer[] cannot be converted to int[]
    int[] numlist = new Integer[N];
                    ^
Main.java:15: error: no suitable method found for sort(int[],Comparator<Object>)
    Arrays.sort(numlist, Collections.reverseOrder());
          ^
    method Arrays.<T#1>sort(T#1[],Comparator<? super T#1>) is not applicable
      (inference variable T#1 has incompatible bounds
        equality constraints: int
        upper bounds: Object)
    method Arrays.<T#2>sort(T#2[],int,int,Comparator<? super T#2>) is not applicable
      (cannot infer type-variable(s) T#2
        (actual and formal argument lists differ in length))
  where T#1,T#2 are type-variables:
    T#1 extends Object declared in method <T#1>sort(T#1[],Comparator<? super T#1>)
    T#2 extends Object declared in method <T#2>sort(T#2[],int,int,Comparator<? super T#2>)
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
2 errors
Language: C++

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

int main(){
  int N, Aamount = 0, Bamount = 0, answer;
  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());
  
  for(int i = 0; i < N; i+=2){
    Aamount += a.at(i);
  }
  for(int i = 1; i < N; i+=2){
    Bamount += a.at(i);
  }
  answer = Aamount - Bamount;
  cout << answer << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: no match for call to '(std::vector<int>) (int&)'
    9 |     cin >> a(i);
      |            ~^~~
Language: C++

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

int main(){
  int N, Aamount = 0, Bamount = 0, answer;
  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());
  
  for(int i = 0; i < N; i+=2){
    Aamount += a.at(i);
  }
  for(int i = 1; i < N; i+=2){
    Bamount += a.at(i);
  }
  answer = Aamount - Bamount;
  cout << answer << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected ',' or ';' before 'for'
    8 |   for(int i = 0; i < N; i++){
      |   ^~~
a.cc:8:18: error: 'i' was not declared in this scope
    8 |   for(int i = 0; i < N; i++){
      |                  ^
Language: C++

#include <iostream>

using namespace std;

int main(){
    int n,res,s,t;
    cin >> n;
    int a[110];
    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)s+=a[i];
        else t+=a[i];
    }
    res=s-t;
    cout << res << 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(a,a+n,greater<int>());
      |     ^~~~
      |     short
Language: C++

#include <iostream>
using namespace std;

int main(){
    int n,res,s,t;
    cin >> n;
    int a[110];
    for(int i=0;i<n;i++){
        int j;
        cin >> a[i];
    }
    sort(a,a+n,greater<int>());
    for(int i=0;i<n;i++){
        if(i%2==0)s+=a[i];
        else t+=a[i];
    }
    res=s-t;
    cout << res << 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(a,a+n,greater<int>());
      |     ^~~~
      |     short
Language: C++

// #include<iostream>
// using namespace std;
// int main(){
//   int n;cin>>n;
//   int allice=0,bob=0,c;
//   for(int i=0;i<n;i++){
//     cin>>c;
//     if(i%2==0)allice+=c;
//     else if(i%!=0)bob+=c;
//   }
// }

#include<iostream>
using namespace std;
#define MAX 500000
#define SENTINEL 2000000000

int L[MAX/2 + 2], R[MAX/2+2];
int cnt;

void merge(int A[], int n, int left, int mid, int right){
  int n1 = mid - left;
  int n2 = right - mid;
  for( int i = 0; i < n1; i++ )L[i] = A[left + i];
  for( int i = 0; i < n2; i++ )R[i] = A[mid + i];
  L[n1] = R[n2] = SENTINEL;
  int i = 0, j = 0;
  for ( int k = left; k < right; k++ ){
    cnt++;
    if(L[i] <= R[j]){
      A[k] = L[i++];
    }else{
      A[k] = R[j++];
    }
  }
}

void mergeSort(int A[], int n, int left, int right){
  if( left+1 < right){
    int mid = (left + right) / 2;
    mergeSort(A, n, left, mid);
    mergeSort(A, n, mid, right);
    merge(A, n, left, mid, right);
  }
}

int main(){
  int A[MAX], n, i;
  cnt = 0;cin>>n;
  for (i=0;i<n;i++)cin>>A[i];
  mergeSort(A, n, 0, n);
  for(int i=n;i>=0;i-=2){
    allice+=A[i];
  }
  for(int i=n-1;i>=0;i-=2){
    bob+=A[i];
  }
  cout<<allice-bob<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:53:5: error: 'allice' was not declared in this scope; did you mean 'alloca'?
   53 |     allice+=A[i];
      |     ^~~~~~
      |     alloca
a.cc:56:5: error: 'bob' was not declared in this scope
   56 |     bob+=A[i];
      |     ^~~
a.cc:58:9: error: 'allice' was not declared in this scope; did you mean 'alloca'?
   58 |   cout<<allice-bob<<endl;
      |         ^~~~~~
      |         alloca
a.cc:58:16: error: 'bob' was not declared in this scope
   58 |   cout<<allice-bob<<endl;
      |                ^~~
Language: C++

#include<iosteram>
#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 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;
}
return 0;
}

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

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <thread>
#include <chrono>
#include <queue>
#include <set>

using namespace std;

int main(void){
	int n;
	cin >> n;
	vector<int> array;
	for(int i=0;i<n;i++){
		cin >> array[i];
	}
	sort(array.begin(), array.end());

	//alice
	int alice = 0;
	for(int i=0;i<array.length();i=i+2){
		alice += array[i];
	}

	int bob = 0;
	for(int i=1;i<array.length();i=i+2){
		bob += array[i];
	}

	cout << alice - bob << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:29: error: 'class std::vector<int>' has no member named 'length'
   25 |         for(int i=0;i<array.length();i=i+2){
      |                             ^~~~~~
a.cc:30:29: error: 'class std::vector<int>' has no member named 'length'
   30 |         for(int i=1;i<array.length();i=i+2){
      |                             ^~~~~~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:22:13: error: 'Alice' was not declared in this scope
   22 |   int ans = Alice - Bob;
      |             ^~~~~
a.cc:22:21: error: 'Bob' was not declared in this scope
   22 |   int ans = Alice - Bob;
      |                     ^~~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:20:19: error: expected ';' before '}' token
   20 |     Bob += a.at(i)
      |                   ^
      |                   ;
   21 |   }
      |   ~                
a.cc:22:13: error: 'Alice' was not declared in this scope
   22 |   int ans = Alice - Bob;
      |             ^~~~~
a.cc:22:21: error: 'Bob' was not declared in this scope
   22 |   int ans = Alice - Bob;
      |                     ^~~
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];
  }
  int A = 0;
  int B = 0 : sort(a.begin(), a.end());
  for (int i = 0; i < N; i++) {
    if (i % 2 == 0)
      A += a[i];
    else
      B += a[i];
  }
  cout << A - B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: expected ',' or ';' before ':' token
   12 |   int B = 0 : sort(a.begin(), a.end());
      |             ^
Language: C++

#incluce<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.rbegin(), a.rend());
  int ans = 0, sign = 1;
  for(int i = 0 ; i < n ; i++){
    ans += sign * a[i];
    sign = -sign;
  }
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incluce; did you mean #include?
    1 | #incluce<bits/stdc++.h>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> n;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #incluce<bits/stdc++.h>
a.cc:7:3: error: 'vector' was not declared in this scope
    7 |   vector<int> a(n);
      |   ^~~~~~
a.cc:1:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
  +++ |+#include <vector>
    1 | #incluce<bits/stdc++.h>
a.cc:7:10: error: expected primary-expression before 'int'
    7 |   vector<int> a(n);
      |          ^~~
a.cc:9:12: error: 'a' was not declared in this scope
    9 |     cin >> a[i];
      |            ^
a.cc:11:8: error: 'a' was not declared in this scope
   11 |   sort(a.rbegin(), a.rend());
      |        ^
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(a.rbegin(), a.rend());
      |   ^~~~
      |   short
a.cc:17:3: error: 'cout' was not declared in this scope
   17 |   cout << ans << endl;
      |   ^~~~
a.cc:17:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:17:18: error: 'endl' was not declared in this scope
   17 |   cout << ans << endl;
      |                  ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #incluce<bits/stdc++.h>
Language: C++

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

int main() {
	int N, A = 0, B = 0;
	cin >> N;
	vector<int>v(N);
	REP(i, N) {
		cin >> v[i];
	}
	sort(v.begin(), v.end());
	REP(i, N) {
		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:7:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |         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:8:9: error: 'vector' was not declared in this scope
    8 |         vector<int>v(N);
      |         ^~~~~~
a.cc:8:9: note: suggested alternatives:
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:3:
/usr/include/c++/14/bits/stl_vector.h:428:11: note:   'std::vector'
  428 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
/usr/include/c++/14/vector:93:13: note:   'std::pmr::vector'
   93 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
a.cc:8:16: error: expected primary-expression before 'int'
    8 |         vector<int>v(N);
      |                ^~~
a.cc:9:13: error: 'i' was not declared in this scope
    9 |         REP(i, N) {
      |             ^
a.cc:9:9: error: 'REP' was not declared in this scope
    9 |         REP(i, N) {
      |         ^~~
a.cc:12:14: error: 'v' was not declared in this scope
   12 |         sort(v.begin(), v.end());
      |              ^
a.cc:12:9: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
   12 |         sort(v.begin(), v.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:22:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   22 |         cout << A - B << 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:22:26: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   22 |         cout << A - B << 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++

#include<iostream>
#include<algorithm>

int main() {
	int N, A = 0, B = 0;
	cin >> N;
	vector<int>v(N);
	REP(i, N) {
		cin >> v[i];
	}
	sort(v.begin(), v.end());
	REP(i, N) {
		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:6:9: 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:7:9: error: 'vector' was not declared in this scope
    7 |         vector<int>v(N);
      |         ^~~~~~
a.cc:7:16: error: expected primary-expression before 'int'
    7 |         vector<int>v(N);
      |                ^~~
a.cc:8:13: error: 'i' was not declared in this scope
    8 |         REP(i, N) {
      |             ^
a.cc:8:9: error: 'REP' was not declared in this scope
    8 |         REP(i, N) {
      |         ^~~
a.cc:11:14: error: 'v' was not declared in this scope
   11 |         sort(v.begin(), v.end());
      |              ^
a.cc:11:9: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
   11 |         sort(v.begin(), v.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:21:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   21 |         cout << A - B << 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:21:26: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   21 |         cout << A - B << 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++

#include<iostream>
#include<algorithm>

using namespace std;

int main(){
	int n;
  	int a[100];
    int alice=0,bob=0;
  	cin >> n;
  	for(int i=0;i<n;++i) cin >> a[i];
  	sort(a,a+n);
  	reverse(a.begin(),a.end());
  	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:13:19: error: request for member 'begin' in 'a', which is of non-class type 'int [100]'
   13 |         reverse(a.begin(),a.end());
      |                   ^~~~~
a.cc:13:29: error: request for member 'end' in 'a', which is of non-class type 'int [100]'
   13 |         reverse(a.begin(),a.end());
      |                             ^~~
Language: C++

#include<iostream>
#include<algorithm>

using namespace std;

int main(){
	int n;
  	int a[100];]
    int alice=0,bob=0;
  	cin >> n;
  	for(int i=0;i<n;++i) cin >> a[i];
  	sort(a.begin(),a.end());
  	reverse(a.begin(),a.end());
  	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:8:20: error: expected primary-expression before ']' token
    8 |         int a[100];]
      |                    ^
a.cc:12:16: error: request for member 'begin' in 'a', which is of non-class type 'int [100]'
   12 |         sort(a.begin(),a.end());
      |                ^~~~~
a.cc:12:26: error: request for member 'end' in 'a', which is of non-class type 'int [100]'
   12 |         sort(a.begin(),a.end());
      |                          ^~~
a.cc:13:19: error: request for member 'begin' in 'a', which is of non-class type 'int [100]'
   13 |         reverse(a.begin(),a.end());
      |                   ^~~~~
a.cc:13:29: error: request for member 'end' in 'a', which is of non-class type 'int [100]'
   13 |         reverse(a.begin(),a.end());
      |                             ^~~
a.cc:16:17: error: 'alice' was not declared in this scope
   16 |                 alice+=a[i];
      |                 ^~~~~
a.cc:18:17: error: 'bob' was not declared in this scope
   18 |                 bob+=a[i];
      |                 ^~~
a.cc:20:17: error: 'alice' was not declared in this scope
   20 |         cout << alice-bob << endl;
      |                 ^~~~~
a.cc:20:23: error: 'bob' was not declared in this scope
   20 |         cout << alice-bob << endl;
      |                       ^~~
Language: C++

#include<iostream>
#include<algorithm>

using namespace std;

int main(){
	int n;
  	int a[100];]
    int alice=0,bob=0;
  	cin >> n;
  	for(int i=0;i<n:++i) cin >> a[i];
  	sort(a.begin(),a.end());
  	reverse(a.begin(),a.end());
  	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:8:20: error: expected primary-expression before ']' token
    8 |         int a[100];]
      |                    ^
a.cc:11:21: warning: range-based 'for' loops with initializer only available with '-std=c++20' or '-std=gnu++20' [-Wc++20-extensions]
   11 |         for(int i=0;i<n:++i) cin >> a[i];
      |                     ^
a.cc:11:24: error: expected ';' before ':' token
   11 |         for(int i=0;i<n:++i) cin >> a[i];
      |                        ^
      |                        ;
a.cc:12:16: error: request for member 'begin' in 'a', which is of non-class type 'int [100]'
   12 |         sort(a.begin(),a.end());
      |                ^~~~~
a.cc:12:26: error: request for member 'end' in 'a', which is of non-class type 'int [100]'
   12 |         sort(a.begin(),a.end());
      |                          ^~~
a.cc:13:19: error: request for member 'begin' in 'a', which is of non-class type 'int [100]'
   13 |         reverse(a.begin(),a.end());
      |                   ^~~~~
a.cc:13:29: error: request for member 'end' in 'a', which is of non-class type 'int [100]'
   13 |         reverse(a.begin(),a.end());
      |                             ^~~
a.cc:13:35: error: expected ')' before ';' token
   13 |         reverse(a.begin(),a.end());
      |                                   ^
      |                                   )
a.cc:11:12: note: to match this '('
   11 |         for(int i=0;i<n:++i) cin >> a[i];
      |            ^
a.cc:16:17: error: 'alice' was not declared in this scope
   16 |                 alice+=a[i];
      |                 ^~~~~
a.cc:18:17: error: 'bob' was not declared in this scope
   18 |                 bob+=a[i];
      |                 ^~~
a.cc:20:17: error: 'alice' was not declared in this scope
   20 |         cout << alice-bob << endl;
      |                 ^~~~~
a.cc:20:23: error: 'bob' was not declared in this scope
   20 |         cout << alice-bob << endl;
      |                       ^~~
Language: C++

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

int main() {
  int N;
  cin >> N;
  vector<int> v;
  int Alice = 0, Bob = 0;

  for(int i = 0; i < N; i++) {
    int input;
    cin >> input;
    v.push_back(input);
  }

  sort(v.begin(), v.end(), std::greater<int>());

  for(int i = 0; i < N; i++) {
    if (i % 2 == 0)
      Alice += v[i];
    else
      Bob += v[i];
  }

  cout << Alice - Bob;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |   sort(v.begin(), v.end(), std::greater<int>());
      |   ^~~~
      |   short