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

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  vector<int> card(N);
  for (int i = 0; i < N; i++){
	  cin >> card.at(N);
  }
  sort(card.begin(), card.end());
  int A, B;
  for (int j = 0; i < N; i += 2){
	  A += card.at(i);
  }
  for (int k = 1; i < N; i += 2){
	  B += card.at(i);
  }
  cout << A - B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:19: error: 'i' was not declared in this scope
   13 |   for (int j = 0; i < N; i += 2){
      |                   ^
a.cc:16:19: error: 'i' was not declared in this scope
   16 |   for (int k = 1; i < N; i += 2){
      |                   ^
Language: Java

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

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int number = Integer.parseInt(sc.next());
        List<Integer> list = new ArrayList<>();
        for(int i = 0; i < number; i++) {
            list.add(Integer.parseInt(sc.next()));
        }
        int sum = 0;
        for(int i = 0; i < number; i++) {
            int max = list.remove(0);
            if(i % 2 == 0) {
                sum += max;
            } else {
                sum -= max;
            }
        }
        return sum;
    }
}

Compiler output:
Main.java:22: error: incompatible types: unexpected return value
        return sum;
               ^
1 error
Language: Java

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

public class CardGameForTwo{
    public static void main(String args[]){
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        Integer a[] = new Integer [n];
        int sum = 0;
        int flag = 1;

        for(int i = 0;i < n;i++){
            a[i] = scanner.nextInt();
        }

        Arrays.sort(a,Comparator.reverseOrder());
        for(int i = 0;i < n;i++){
            sum += flag * a[i];
            flag = -flag;
        }

        System.out.println(sum);
    }
}

Compiler output:
Main.java:6: error: class CardGameForTwo is public, should be declared in a file named CardGameForTwo.java
public class CardGameForTwo{
       ^
1 error
Language: Java

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


    public static void main(String args[]){
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        Integer a[] = new Integer [n];
        int sum = 0;
        int flag = 1;

        for(int i = 0;i < n;i++){
            a[i] = scanner.nextInt();
        }

        Arrays.sort(a,Comparator.reverseOrder());
        for(int i = 0;i < n;i++){
            sum += flag * a[i];
            flag = -flag;
        }

        System.out.println(sum);


Compiler output:
Main.java:7: error: unnamed classes are a preview feature and are disabled by default.
    public static void main(String args[]){
                  ^
  (use --enable-preview to enable unnamed classes)
Main.java:24: error: reached end of file while parsing
        System.out.println(sum);
                                ^
2 errors
Language: Java

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

public class CardForTwo{
    public static void main(String args[]){
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        Integer a[] = new Integer [n];
        int sum = 0;
        int flag = 1;

        for(int i = 0;i < n;i++){
            a[i] = scanner.nextInt();
        }

        Arrays.sort(a,Comparator.reverseOrder());
        for(int i = 0;i < n;i++){
            sum += flag * a[i];
            flag = -flag;
        }

        System.out.println(sum);
    }
}

Compiler output:
Main.java:6: error: class CardForTwo is public, should be declared in a file named CardForTwo.java
public class CardForTwo{
       ^
1 error
Language: C++

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main (void)
{
 int a[100],n,ans = 0;

  cin >> n;

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

  sort(a.begin(),a.end());

  for(j = 1;j <= n;j++){
    if(j % 2 == 1){
      ans += a[n - j];
    }
    else{
      ans -= a[n - j];
    }
  }
  
  cout << ans << endl;

  return 0;
}





Compiler output:
a.cc: In function 'int main()':
a.cc:13:7: error: 'i' was not declared in this scope
   13 |   for(i = 0;i < n;i++){
      |       ^
a.cc:17:10: error: request for member 'begin' in 'a', which is of non-class type 'int [100]'
   17 |   sort(a.begin(),a.end());
      |          ^~~~~
a.cc:17:20: error: request for member 'end' in 'a', which is of non-class type 'int [100]'
   17 |   sort(a.begin(),a.end());
      |                    ^~~
a.cc:19:7: error: 'j' was not declared in this scope
   19 |   for(j = 1;j <= n;j++){
      |       ^
Language: C++

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main (void)
{
 int a[100],n,ans = 0;

  cin >> n;

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

  sort(a,a+n);

  for(j = 1;j <= n;j++){
    if(j % 2 == 1){
      ans += a[n - j];
    }
    else{
      ans -= a[n - j];
    }
  }
  
  cout << ans << endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:7: error: 'i' was not declared in this scope
   13 |   for(i = 0;i < n;i++){
      |       ^
a.cc:19:7: error: 'j' was not declared in this scope
   19 |   for(j = 1;j <= n;j++){
      |       ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main() {
    int n;
    cin >> n;
    vector<int> a;
    for (int i = 0; i < n; i++) {
        int num;
        cin >> num;
        a.push_back(num);
    }
    sort(a.begin(), a.end(), greater<int>{});
    int alice = 0;
    int bob = 0;
    for (int i = 0; i < n; i++) {
        int num = a.front();
        a.erase(a.begin());
        if (i % 2 == 0) {
            //cout << "alice:" << num << endl;
            alice += num;
        } else {
            //cout << "bob:" << num << endl;
            bob += num;
        }
    }
    cout << alice - bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   15 |     sort(a.begin(), a.end(), greater<int>{});
      |     ^~~~
      |     short
Language: C++

#define _GLIBCXX_DEBUG
#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;

#define REP(i,n) for(int i=0;i<(int)n;++i)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)
#define ALL(c) (c).begin(), (c).end()

int main() {
    int n;
    cin >> n;
    vector<int> a(n);
    REP(i,n) {
        int b;
        cin >> b;
        a[i] = b;
    }

    sort(ALL(a), greater<int>(ma));
    int al = 0, bo = 0;
    REP(i, n) {
        if(i%2 == 0) al += a[i];
        else bo += a[i];
    }

    cout << al-bo << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:31: error: 'ma' was not declared in this scope; did you mean 'a'?
   23 |     sort(ALL(a), greater<int>(ma));
      |                               ^~
      |                               a
Language: C++


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

int main() {
    int n;
    cin>>n;
    int a[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+=2){
        A+=a[i];
    }
    for(int j=1;j<n;j+=2){
        B+=a[j];
    }
    cout<<(A-B)<<endl;
    
    return 0;
}

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>
#include <vector>
using namespace std;

void algorithm() {
    int n, a, alice=0, bob=0;
    vector<int> cards;
    cin >> n;
    while(cin >> a) {
        auto j = cards.begin();
        for(auto i=cards.begin(); i < cards.end() && *i > a; i++) j=i+1;
        cards.insert(j, a);
    }
    for(int i=0; i<cards.size(); i++){
        if(i%2==0) alice+=cards[i];
        else bob += cards[i];
    }
    cout << alice - bob << endl;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<algorithm>
#include<vector>
#include<iostream>
using namespace std;
int main(){
  int N;
  cin>>N
  vector<int>a(N);
  int i,j,k,sum;
  for(i=0;i<N;i++){
    cin>>a[i];
  }
  sort(a,a+N);
  j=k=0;
  for(i=N-1;i>=0;i-=2){
    j+=a[i];
  }
  
  for(i=N-2;i>=0;i-=2){
    k+=a[i];
  }
  cout<<j-k<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: expected ';' before 'vector'
    7 |   cin>>N
      |         ^
      |         ;
    8 |   vector<int>a(N);
      |   ~~~~~~ 
a.cc:11:10: error: 'a' was not declared in this scope
   11 |     cin>>a[i];
      |          ^
a.cc:13:8: error: 'a' was not declared in this scope
   13 |   sort(a,a+N);
      |        ^
Language: C++

#include<algorithm>
#include<vector>
using namespace std;
int main(){
  int N;
  cin>>N
  vector<int>a(N);
  int i,j,k,sum;
  for(i=0;i<N;i++){
    cin>>a[i];
  }
  sort(a,a+N);
  j=k=0;
  for(i=N-1;i>=0;i-=2){
    j+=a[i];
  }
  
  for(i=N-2;i>=0;i-=2){
    k+=a[i];
  }
  cout<<j-k<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>N
      |   ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<vector>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:10:10: error: 'a' was not declared in this scope
   10 |     cin>>a[i];
      |          ^
a.cc:12:8: error: 'a' was not declared in this scope
   12 |   sort(a,a+N);
      |        ^
a.cc:21:3: error: 'cout' was not declared in this scope
   21 |   cout<<j-k<<endl;
      |   ^~~~
a.cc:21:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:21:14: error: 'endl' was not declared in this scope
   21 |   cout<<j-k<<endl;
      |              ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include<vector>
  +++ |+#include <ostream>
    3 | using namespace std;
Language: C++

#include<bits/stdc++.h>
using namespace std;
bool cmp(int x,int y) {
    return x>y;
}
int n,a[1001],s1,s2;
int main()
{
    cin>>n;
    for(i=1;i<=n;i++)
    cin>>a[i];
    sort(a+1,a+n+1,cmp);
    for(i=1;i<=n;i+=2)
    s1+=a[i];
    for(i=2;i<=n;i+=2)
    s2+=a[i];
    cout<<s1-s2<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'i' was not declared in this scope
   10 |     for(i=1;i<=n;i++)
      |         ^
a.cc:13:9: error: 'i' was not declared in this scope
   13 |     for(i=1;i<=n;i+=2)
      |         ^
a.cc:15:9: error: 'i' was not declared in this scope
   15 |     for(i=2;i<=n;i+=2)
      |         ^
Language: C++

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

int main(){
  int N;
  int a[100];
  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:16:28: error: expected ';' before ')' token
   16 |   for(int i = 0; i < N, i++){
      |                            ^
      |                            ;
Language: C++

#include<iostream>
#include<algorithm>
int main() {
    int N;
    int a[110];  // 最大 100 個ですが余裕をもたせます
    cin >> N;
    for (int i = 0; i < N; ++i) cin >> a[i];

    sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
    int Alice = 0;
    int Bob = 0;
    for (int i = 0; i < N; ++i) {
        if (i % 2 == 0) { // Alice のターン
            Alice += a[i];
        }
        else { // Bob のターン
            Bob += a[i];
        }
    }
    cout << Alice - Bob << 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:9:20: error: 'greater' was not declared in this scope; did you mean 'std::greater'?
    9 |     sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
      |                    ^~~~~~~
      |                    std::greater
In file included from /usr/include/c++/14/string:49,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/bits/stl_function.h:353:12: note: 'std::greater' declared here
  353 |     struct greater;
      |            ^~~~~~~
a.cc:9:28: error: expected primary-expression before 'int'
    9 |     sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
      |                            ^~~
a.cc:9:5: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
    9 |     sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
      |     ^~~~
      |     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:20:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   20 |     cout << Alice - Bob << 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:20:28: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   20 |     cout << Alice - Bob << endl;
      |                            ^~~~
      |                            std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: Java

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int a[] = new int[n];
		for(int i = 0; i < n; i++) {
			a[i] = scan.nextInt();
		}
		int work, idx;
		for(int i = 0; i < n; i++) {
			idx = i;
			for(int k = i + 1; k < n; k++) {
				if(a[i] < a[k]) {
					idx = k;
				}
				work = a[i];
				a[i] = a[idx];
				a[idx] = work;
			}
		}
		int Alice = 0, Bob = 0;
		for(int i = 0; i < n; i++) {
			if(i % 2 == 0) {
				Alice += a[i];
			} else {
				Bob += a[i];
			}
		}
		System.out.println(Alice - Bob);
	}
}


Compiler output:
Main.java:5: error: cannot find symbol
		Scanner scan = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class Main
Main.java:5: error: cannot find symbol
		Scanner scan = new Scanner(System.in);
		                   ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: C++

import java.util.Scanner;
class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n =sc.nextInt();
        int[] a = new int[n];
        for(int i=0;i<n;i++) {
            a[i] = sc.nextInt();
        }
        for(int i=0;i<n-1;i++)
            for(int j=0;j<n-i-1;j++)
                if(a[j]<a[j+1]) {
                    int tmp = a[j];
                    a[j] = a[j+1];
                    a[j+1] = tmp;
                }
        int sum1 = 0;
        int sum2 = 0;
        int flag = 1;
        for(int i=0;i<n;i++,flag*=-1) {
            if(flag==1) {
                sum1+=a[i];
            }
            else sum2+=a[i];
        }
        System.out.println(sum1-sum2);
    }
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:11: error: expected ':' before 'static'
    3 |     public static void main(String[] args) {
      |           ^~~~~~~
      |           :
a.cc:3:29: error: 'String' has not been declared
    3 |     public static void main(String[] args) {
      |                             ^~~~~~
a.cc:3:38: error: expected ',' or '...' before 'args'
    3 |     public static void main(String[] args) {
      |                                      ^~~~
a.cc:28:2: error: expected ';' after class definition
   28 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:4:9: error: 'Scanner' was not declared in this scope
    4 |         Scanner sc = new Scanner(System.in);
      |         ^~~~~~~
a.cc:5:16: error: 'sc' was not declared in this scope
    5 |         int n =sc.nextInt();
      |                ^~
a.cc:6:12: error: structured binding declaration cannot have type 'int'
    6 |         int[] a = new int[n];
      |            ^~
a.cc:6:12: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:6:12: error: empty structured binding declaration
a.cc:6:15: error: expected initializer before 'a'
    6 |         int[] a = new int[n];
      |               ^
a.cc:8:13: error: 'a' was not declared in this scope
    8 |             a[i] = sc.nextInt();
      |             ^
a.cc:12:20: error: 'a' was not declared in this scope
   12 |                 if(a[j]<a[j+1]) {
      |                    ^
a.cc:22:23: error: 'a' was not declared in this scope
   22 |                 sum1+=a[i];
      |                       ^
a.cc:24:24: error: 'a' was not declared in this scope
   24 |             else sum2+=a[i];
      |                        ^
a.cc:26:9: error: 'System' was not declared in this scope
   26 |         System.out.println(sum1-sum2);
      |         ^~~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(){
	int n;
	cin >> n;
	priority_queue<int, vector<int>, greater<int>> que;
	while(n > 0){
		int t;
		cin >> t;
		que.push(t);
		n = n - 1;
	}
	int a = 0, b = 0;
	while(que.size()){
		int t = que.pop();
		if(que.size() % 2) a += t;
		else b += t;
	}
	cout << abs(a - b) << "\n";
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:32: error: void value not ignored as it ought to be
   17 |                 int t = que.pop();
      |                         ~~~~~~~^~
Language: C++

#include <iostream>
#include <algorithm>

using namespace std;

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


Compiler output:
a.cc: In function 'int main()':
a.cc:22:9: error: 'alice' was not declared in this scope
   22 |   cout<<alice-bob<<endl;
      |         ^~~~~
a.cc:22:15: error: 'bob' was not declared in this scope
   22 |   cout<<alice-bob<<endl;
      |               ^~~
Language: C++

#include <iostream>
#include <string>
#include <math.h>

using namespace std;

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

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

    sort(a, a + n, greater<int>());
    int alice = 0, 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:16:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   16 |     sort(a, a + n, greater<int>());
      |     ^~~~
      |     sqrt
Language: C++

#include<bits/stdc++.h>
using namespace std;
int a[10001],n,m;
priority_queue<int> q;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
	cin>>m,q.push(m);
    for(int i=1;i<=n;i++)
	{
	     m=q.top();
		 q.pop();
		 a[i%2]+=m;
	}
	cout<<a[1]-a[0];
    return 0;
}
#include<bits/stdc++.h>
using namespace std;
int a[10001],n,m;
priority_queue<int> q;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
	cin>>m,q.push(m);
    for(int i=1;i<=n;i++)
	{
	     m=q.top();
		 q.pop();
		 a[i%2]+=m;
	}
	cout<<a[1]-a[0];
    return 0;
}


Compiler output:
a.cc:21:5: error: redefinition of 'int a [10001]'
   21 | int a[10001],n,m;
      |     ^
a.cc:3:5: note: 'int a [10001]' previously declared here
    3 | int a[10001],n,m;
      |     ^
a.cc:21:14: error: redefinition of 'int n'
   21 | int a[10001],n,m;
      |              ^
a.cc:3:14: note: 'int n' previously declared here
    3 | int a[10001],n,m;
      |              ^
a.cc:21:16: error: redefinition of 'int m'
   21 | int a[10001],n,m;
      |                ^
a.cc:3:16: note: 'int m' previously declared here
    3 | int a[10001],n,m;
      |                ^
a.cc:22:21: error: redefinition of 'std::priority_queue<int> q'
   22 | priority_queue<int> q;
      |                     ^
a.cc:4:21: note: 'std::priority_queue<int> q' previously declared here
    4 | priority_queue<int> q;
      |                     ^
a.cc:23:5: error: redefinition of 'int main()'
   23 | int main()
      |     ^~~~
a.cc:5:5: note: 'int main()' previously defined here
    5 | int main()
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int a[10001];
priority_queue<int> q;
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
	cin>>m,q.push(m);
    for(int i=1;i<=n;i++)
	{
	     m=q.top();
		 q.pop();
		 a[i%2]+=m;
	}
	cout<<a[1]-a[0];
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: 'n' was not declared in this scope; did you mean 'yn'?
    7 |     cin>>n;
      |          ^
      |          yn
a.cc:9:14: error: 'm' was not declared in this scope
    9 |         cin>>m,q.push(m);
      |              ^
a.cc:12:14: error: 'm' was not declared in this scope
   12 |              m=q.top();
      |              ^
Language: C++

#!/bin/bash

tail -1 | tr ' ' '\n' | sort | awk '
{ a=$1-a }
END {print a<0?-a:a}'


Compiler output:
a.cc:1:2: error: invalid preprocessing directive #!
    1 | #!/bin/bash
      |  ^
a.cc:3:36: warning: missing terminating ' character
    3 | tail -1 | tr ' ' '\n' | sort | awk '
      |                                    ^
a.cc:3:36: error: missing terminating ' character
a.cc:5:21: warning: missing terminating ' character
    5 | END {print a<0?-a:a}'
      |                     ^
a.cc:5:21: error: missing terminating ' character
a.cc:3:1: error: 'tail' does not name a type
    3 | tail -1 | tr ' ' '\n' | sort | awk '
      | ^~~~
a.cc:5:1: error: 'END' does not name a type
    5 | END {print a<0?-a:a}'
      | ^~~
Language: C++

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

int main() {
  int n;
  cin >> n;
  vector<int> a;
  for (int i = 0; i < n; i++) {
    int x;
    cin >> x;
    a.push_back(x);
  }
  sort(a.begin(), a.end());
  int alice, bob;
  alice = 0;
  bob = 0;
  for (int i = 0; i < n; i++) {
    if (i % 2 == 0)
      alice += a[n-i-1];
    else
      bob += a[n-i-1];
  }
  cout << alice - bob << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   14 |   sort(a.begin(), a.end());
      |   ^~~~
      |   short
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[] a = new int[N]; 
for(int i = 0;i < N;i++){
a[i] = sc.nextInt();
}
Arrays.sort(a);
int sumA = 0;
int sumB = 0;
for(int i = 0;i < N;i = i+2){int sumA += i;}
for(int i = 1;i < N;i = i+2){int sumB += i;}
System.out.println(sumA - sumB);
}
}


Compiler output:
Main.java:13: error: ';' expected
for(int i = 0;i < N;i = i+2){int sumA += i;}
                                     ^
Main.java:13: error: not a statement
for(int i = 0;i < N;i = i+2){int sumA += i;}
                                         ^
Main.java:14: error: ';' expected
for(int i = 1;i < N;i = i+2){int sumB += i;}
                                     ^
Main.java:14: error: not a statement
for(int i = 1;i < N;i = i+2){int sumB += i;}
                                         ^
4 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[] a = new int[N]; 
for(int i = 0;i < N;i++){
a[i] = sc.nextInt();
}
Arrays.sort(a);
int sumA = 0;
int sumB = 0;
for(i = 0;i < N;i = i+2){int sumA += i;}
for(i = 1;i < N;i = i+2){int sumB += i;}
System.out.println(sumA - sumB);
}
}

Compiler output:
Main.java:13: error: ';' expected
for(i = 0;i < N;i = i+2){int sumA += i;}
                                 ^
Main.java:13: error: not a statement
for(i = 0;i < N;i = i+2){int sumA += i;}
                                     ^
Main.java:14: error: ';' expected
for(i = 1;i < N;i = i+2){int sumB += i;}
                                 ^
Main.java:14: error: not a statement
for(i = 1;i < N;i = i+2){int sumB += i;}
                                     ^
4 errors
Language: C++

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using pii = pair<int, int>;

int N;
int a[110];

int main() {
  cin.tie(0);
  ios_base::sync_with_stdio(false);
  cout << fixed << setprecision(10);
  
  cin >> N;
  for (int i = 0; i < N; i++) {
    cin >> a[i];
  }
  sort(a, a + n);
  reverse(a, a + n);
  int A = 0, B = 0;
  for (int i = 0; i < N; i++) {
    if (i & 1) B += a[i];
    else A += a[i];
  }
  cout << A - B << endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:15: error: 'n' was not declared in this scope
   19 |   sort(a, a + n);
      |               ^
Language: C++

#include<iostream>
#include<algorithm>
#include<vector>
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,greatr());

    while(N<0){
        int i = 0;
        int alice = 0;
        int bob = 0;

        alice += a[i];
        bob += a[i + 1];

        i += 2;
        N--;
    }
    cout << alice - bob << "\n";
}
   

Compiler output:
a.cc: In function 'int main()':
a.cc:15:16: error: 'greatr' was not declared in this scope
   15 |     sort(a,a+N,greatr());
      |                ^~~~~~
a.cc:28:13: error: 'alice' was not declared in this scope
   28 |     cout << alice - bob << "\n";
      |             ^~~~~
a.cc:28:21: error: 'bob' was not declared in this scope
   28 |     cout << alice - bob << "\n";
      |                     ^~~
Language: C++

#include<iostream>
using namespace std;
int main(){
  int N;
  cin>>N;
  int card[N];
  for(int i=0;i<N;i++){
    cin>>card[i];
  }
  int a,b=0;
  sort(card,card+N,greater<int>());
  for(int i=0;i<N;i++){
    if(i%2==0)a+=card[i];
    else b+=card[i];
  }
  cout<<a-b<<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(card,card+N,greater<int>());
      |   ^~~~
      |   short
Language: C++

#include<iostream>
using namespace std;
int findmax(int* a)
{
  int temp=-1;
  int index=-1;
  for(int i;i<a.size()<i++)
  {if(a[i]>temp){temp=a[i];index=i;}
   send=temp;
   a[index]=0;
   return send;
}
int main(){
  int N;
  cin>>N;
  int card[N];
  for(int i=0;i<N;i++)
  {cin>>card[i];}
  int a,b=0;
  for(int i=0;i<50,i++){
    a+=findmax(a);
    b+=findmax(a);
  }
  out<<a-b<<endl;
}
  

Compiler output:
a.cc: In function 'int findmax(int*)':
a.cc:7:17: error: request for member 'size' in 'a', which is of non-class type 'int*'
    7 |   for(int i;i<a.size()<i++)
      |                 ^~~~
a.cc:7:27: error: expected ';' before ')' token
    7 |   for(int i;i<a.size()<i++)
      |                           ^
      |                           ;
a.cc:9:4: error: 'send' was not declared in this scope
    9 |    send=temp;
      |    ^~~~
a.cc:13:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   13 | int main(){
      |         ^~
a.cc:13:9: note: remove parentheses to default-initialize a variable
   13 | int main(){
      |         ^~
      |         --
a.cc:13:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:13:11: error: a function-definition is not allowed here before '{' token
   13 | int main(){
      |           ^
a.cc:25:2: error: expected '}' at end of input
   25 | }
      |  ^
a.cc:4:1: note: to match this '{'
    4 | {
      | ^
Language: C

#include<stdio.h>
int main()
{
    int N,i,j,t;
    int a[103],sum;
    scanf("%d",&N)
        sum=0;
        for(i=1;i<=N;i++)
            scanf("%d",&a[i]);
        for(i=1;i<=N;i++)
        {
            for(j=N;j>=i;j--)
            {
                if(a[j]>a[j-1])
                {
                    t=a[j];
                    a[j]=a[j-1];
                    a[j-1]=t;
                }
            }
        }
        for(i=1;i<=N;i++)
        {
            if(i%2==1)
                sum+=a[i];
            else
                sum-=a[i];
        }
        printf("%d\n",sum);
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:6:19: error: expected ';' before 'sum'
    6 |     scanf("%d",&N)
      |                   ^
      |                   ;
    7 |         sum=0;
      |         ~~~
Language: C++

#include <iostream>
#include <algorithm>
#include <stdlib.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  int a[N];
  for (int i = 0; i < N ;i++) {
    cin >> a[i];
  }
  sort(a,a + N);
  int A = 0;
  int B = 0;
  for (int j = 0; j < N; j++) {
    if (j % 2 == 0) {
      A += a[j];
    }else{
      B += a[j];
    }
  }
  cout << abs(A - B) << endl;
  return 0;
}      A += a[j];
    }else{
      B += a[j];
    }
  }
  cout << abs(A - B) << endl;
  return 0;
}      A += a[j];
    }else{
      B += a[j];
    }
  }
  cout << abs(A - B) << endl;
  return 0;
}

Compiler output:
a.cc:24:8: error: 'A' does not name a type
   24 | }      A += a[j];
      |        ^
a.cc:25:5: error: expected declaration before '}' token
   25 |     }else{
      |     ^
a.cc:25:6: error: expected unqualified-id before 'else'
   25 |     }else{
      |      ^~~~
a.cc:28:3: error: expected declaration before '}' token
   28 |   }
      |   ^
a.cc:29:3: error: 'cout' does not name a type
   29 |   cout << abs(A - B) << endl;
      |   ^~~~
a.cc:30:3: error: expected unqualified-id before 'return'
   30 |   return 0;
      |   ^~~~~~
a.cc:31:1: error: expected declaration before '}' token
   31 | }      A += a[j];
      | ^
a.cc:31:8: error: 'A' does not name a type
   31 | }      A += a[j];
      |        ^
a.cc:32:5: error: expected declaration before '}' token
   32 |     }else{
      |     ^
a.cc:32:6: error: expected unqualified-id before 'else'
   32 |     }else{
      |      ^~~~
a.cc:35:3: error: expected declaration before '}' token
   35 |   }
      |   ^
a.cc:36:3: error: 'cout' does not name a type
   36 |   cout << abs(A - B) << endl;
      |   ^~~~
a.cc:37:3: error: expected unqualified-id before 'return'
   37 |   return 0;
      |   ^~~~~~
a.cc:38:1: error: expected declaration before '}' token
   38 | }
      | ^
Language: C++

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

using namespace std;

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

	vector<int> cards(n);
	for (int i = 0; i < n; i++) cin >> cards[i];
	sort(cards.begin(), cards.end(), greater<int>());
	xx
	int alice = 0, bob = 0;
	for (int i = 0; i < n; i++) {
		(i % 2 == 0 ? alice : bob) += cards[i];
	}

	int ans = alice - bob;
	cout << ans << endl;

    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:16:9: error: 'xx' was not declared in this scope
   16 |         xx
      |         ^~
a.cc:19:31: error: 'alice' was not declared in this scope
   19 |                 (i % 2 == 0 ? alice : bob) += cards[i];
      |                               ^~~~~
a.cc:19:39: error: 'bob' was not declared in this scope
   19 |                 (i % 2 == 0 ? alice : bob) += cards[i];
      |                                       ^~~
a.cc:22:19: error: 'alice' was not declared in this scope
   22 |         int ans = alice - bob;
      |                   ^~~~~
a.cc:22:27: error: 'bob' was not declared in this scope
   22 |         int ans = alice - bob;
      |                           ^~~
Language: C++

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


int main(){
  
  int N;
  cin >> N;
  int A[100];
  for(int i = 0; i < N; i++)
    cin >> A[i];
  int alice = 0, 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];
  }

  if(alice > bob)
    cout << alice - bob << endl;
    else
      cout << bob - alice << endl;

 return 0;
 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:7: error: 'Alice' was not declared in this scope; did you mean 'alice'?
   20 |       Alice += A[i];
      |       ^~~~~
      |       alice
a.cc:32:2: error: expected '}' at end of input
   32 | }
      |  ^
a.cc:7:11: note: to match this '{'
    7 | int main(){
      |           ^
Language: C++

#include <iostream>
using namespace std;

int main(){
  
  int N;
  cin >> N;
  int A[100];
  for(int i = 0; i < N; i++)
    cin >> A[i];
  int alice = 0, bob = 0;
  
  sort(A,A+N);
  for(int i = 0; i < N/2; i++){
    alice += A[i];
    bob += A[i + 1];
  }

  if(N%2 != 0)
    alice += A[N-1];

  if(alice > bob)
    cout << alice - bob << endl;
    else
      cout << bob - alice << endl;
  return 0;
 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   13 |   sort(A,A+N);
      |   ^~~~
      |   short
Language: C++

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

int main(){
	int N, i, ans=0;
	cin >> N;
	int a[N];
	for(i=0; i<N; i++) cin >> a[i];
	sort(a, a+N);
	i=N-1;
	for(i=N-1; i>=0; i-=2){
		ans += a[i]
		if(i==0) break;
		ans -= a[i-1];
	}
	cout << ans ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:28: error: expected ';' before 'if'
   13 |                 ans += a[i]
      |                            ^
      |                            ;
   14 |                 if(i==0) break;
      |                 ~~
Language: C++

#include <iostream>
using namespace std;

int main(){
	int N, i, ans=0;
	cin >> N;
	int a[N];
	for(i=0; i<N; i++) cin >> a[i];
	sort(a, a+N);
	for(i=N-1; i>=0; i-2){
		ans += a[i];
		if(i==0) break;
		ans -= a[i-1];
	}
	cout << ans ;
}

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

#include <iostream>
using namespace std;

int main(){
	int N, i, ans=0;
	cin >> N;
	int a[N];
	for(i=0; i<N; i++) cin >> a[i];
	sort(a, a+N);
	for(i=N-1; i>=0; i-2){
		ans += a[i];
		if(i==0) break;
		ans -= a[i-1];
	}
	cout << ans ;
}

Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C

#include <iostream>
using namespace std;

int main(){
	int N, i, ans=0;
	cin >> N;
	int a[N];
	for(i=0; i<N; i++) cin >> a[i];
	sort(a, a+N);
	for(i=N-1; i>=0; i++){
		ans += a[i];
		i--;
		if(i==0) break;
		ans -= a[i];
		i--;
	}
	cout << ans ;
}

Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

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

int main(){
	int N, i, ans=0;
	cin >> N;
	int a[N];
	for(i=0; i<N; i++) cin >> a[i];
	sort(a, a+N);
	reverse(a, a+N);
	i=0;
	while(i<N){
		ans += a[i];
		i++;
		ans -= a[i];
		i++
	}
	cout << ans ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:20: error: expected ';' before '}' token
   17 |                 i++
      |                    ^
      |                    ;
   18 |         }
      |         ~
Language: C++

#include "iostream"
#include "vector"
using namespace std;

int main(void) {
  int N;
  cin >> N;
  vector<int> a;
  for (int i = 0; i < N; i++) {
    int t;
    cin >> t;
    a.push_back(t);
  }

  sort(a.begin(), a.end(), greater<int>());
  int A = 0, B = 0;
  for (int i = 0; i < N; i++) {
    (i & 1 ? B : A) += a[i];
  }

  cout << A - B << 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.begin(), a.end(), greater<int>());
      |   ^~~~
      |   short
Language: C++

#include<iostream>
using namespace std;

int main(){

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

	for(int i = 0; i < N; i++){
		for(int j = 0; j < N; j++){
			if(a[i] < a[j]){
				int tmp;
				tmp = a[j];
				a[j-i] = a[j];
				a[j] = tmp;
			}
		}
	}

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

	cout << A - B;

	return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:21: error: lvalue required as left operand of assignment
   26 |                 if(N%2 = 0){
      |                    ~^~
Language: C++

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

int main() {
	int n,d;
	cin >> n;
	int a[100];
	for (int i = 0;i < n;i++)cin >> a[i];
	sort(a, a + n,greater<int>());
	for (int i = 0;i < n;i++)d += a[i] * (i % 2 != ? 1 : -1);
	cout << d << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:56: error: expected primary-expression before '?' token
   12 |         for (int i = 0;i < n;i++)d += a[i] * (i % 2 != ? 1 : -1);
      |                                                        ^
Language: C++

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

int main() {
	int n,d;
	cin >> n;
	int a[102];
	for (int i = 0;i < n;i++)cin >> a[i];
	sort(a, a + n,greater<int>());
	for (int i = 0;2 * i + 1 <= n;i++)d += (a[2 * i + 1] - a{ 2 * i]);
	cout << d + a[n - 1] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:62: error: invalid operands of types 'int' and 'int [102]' to binary 'operator-'
   12 |         for (int i = 0;2 * i + 1 <= n;i++)d += (a[2 * i + 1] - a{ 2 * i]);
      |                                                 ~~~~~~~~~~~~ ^ ~
      |                                                            |   |
      |                                                            int int [102]
a.cc:12:65: error: expected ')' before '{' token
   12 |         for (int i = 0;2 * i + 1 <= n;i++)d += (a[2 * i + 1] - a{ 2 * i]);
      |                                                ~                ^
      |                                                                 )
a.cc:14:2: error: expected '}' at end of input
   14 | }
      |  ^
a.cc:6:12: note: to match this '{'
    6 | int main() {
      |            ^
Language: C++

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

int main() {
	int n,Alice,Bob;
	string a;
	cin >> n >> a;
	sort(a, a.size() - 1);
	for (int i = 0;2*i < n ;i++) {
		Alice =+ a[2*i];
	}
	for (int i = 0;2 * i + 1 < n;i++){
		Bob = +a[2 * i + 1];
	}
	cout << Alice - Bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: no matching function for call to 'sort(std::string&, std::__cxx11::basic_string<char>::size_type)'
   10 |         sort(a, a.size() - 1);
      |         ~~~~^~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_algo.h:4762:5: note: candidate: 'template<class _RAIter> void std::sort(_RAIter, _RAIter)'
 4762 |     sort(_RandomAccessIterator __first, _RandomAccessIterator __last)
      |     ^~~~
/usr/include/c++/14/bits/stl_algo.h:4762:5: note:   template argument deduction/substitution failed:
a.cc:10:13: note:   deduced conflicting types for parameter '_RAIter' ('std::__cxx11::basic_string<char>' and 'long unsigned int')
   10 |         sort(a, a.size() - 1);
      |         ~~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4793:5: note: candidate: 'template<class _RAIter, class _Compare> void std::sort(_RAIter, _RAIter, _Compare)'
 4793 |     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
      |     ^~~~
/usr/include/c++/14/bits/stl_algo.h:4793:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:292:1: note: candidate: 'template<class _ExecutionPolicy, class _RandomAccessIterator, class _Compare> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::sort(_ExecutionPolicy&&, _RandomAccessIterator, _RandomAccessIterator, _Compare)'
  292 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp);
      | ^~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:292:1: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note: candidate: 'template<class _ExecutionPolicy, class _RandomAccessIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::sort(_ExecutionPolicy&&, _RandomAccessIterator, _RandomAccessIterator)'
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note:   candidate expects 3 arguments, 2 provided
Language: C++

#include <string>
#include <iostream>
#include <vector>
#include <sstream>
#include <istream>
#include <algorithm>

int main()
{
    int n, a[100];
    std::cin >> n;
    for (int i = 0; i < n; i++) {
        scanf_s("%d", &a[i]);
    }

    std::sort(a, a+n, [](int x, int y) -> int {
        return (x > y);
    });

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

    std::cout << sum << std::endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
   13 |         scanf_s("%d", &a[i]);
      |         ^~~~~~~
      |         scanf
Language: C++

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

int main(){
    int N, a[110];
    cin >> N;
    for(int i = 0; i < N; i++) cin >> a[i];
    sort(a, a + N, greater<int>());
    int b = 0;
    for(int i = 0; i < N; i++) b += a[i] * pow(-1,i) 
    cout << b << endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:53: error: expected ';' before 'cout'
   12 |     for(int i = 0; i < N; i++) b += a[i] * pow(-1,i)
      |                                                     ^
      |                                                     ;
   13 |     cout << b << endl;
      |     ~~~~
Language: C++

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

int main(){
    int N, a[110];
    cin >> N;
    for(int i = 0; i < N; i++) cin >> a[i];
    sort(a, a + N, greater<int>())
    int b = 0;
    for(int i = 0; i < N; i++) b += a[i] * double pow(-1,i) 
    cout << b << endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:35: error: expected ';' before 'int'
   10 |     sort(a, a + N, greater<int>())
      |                                   ^
      |                                   ;
   11 |     int b = 0;
      |     ~~~                            
a.cc:12:32: error: 'b' was not declared in this scope
   12 |     for(int i = 0; i < N; i++) b += a[i] * double pow(-1,i)
      |                                ^
a.cc:12:44: error: expected primary-expression before 'double'
   12 |     for(int i = 0; i < N; i++) b += a[i] * double pow(-1,i)
      |                                            ^~~~~~
Language: C++

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

int main(){
    int N, a[110];
    cin >> N;
    for(int i = 0; i < N; i++) cin >> a[i];
    sort(a, a + N, greater<int>())
    int b = 0;
    for(int i = 0; i < N; i++) b += a[i] * double pow(-1,i) 
    cout << b << endl;
    
    return 0;
}


Compiler output:
a.cc:3:9: fatal error: algorythm: No such file or directory
    3 | #include<algorythm>
      |         ^~~~~~~~~~~
compilation terminated.
Language: C++

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

int main(){
    int N, a[110];
    cin >> N;
    for(int i = 0; i < N; i++) cin >> a[i];
    sort(a, a + N, greater<int>())
    int b = 0;
    for(i = 0; i < N; i++) b + a[i] * double pow(-1,i) 
    cout << b << endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
    9 |     sort(a, a + N, greater<int>())
      |     ^~~~
      |     sqrt
a.cc:11:9: error: 'i' was not declared in this scope
   11 |     for(i = 0; i < N; i++) b + a[i] * double pow(-1,i)
      |         ^
a.cc:11:28: error: 'b' was not declared in this scope
   11 |     for(i = 0; i < N; i++) b + a[i] * double pow(-1,i)
      |                            ^
a.cc:11:39: error: expected primary-expression before 'double'
   11 |     for(i = 0; i < N; i++) b + a[i] * double pow(-1,i)
      |                                       ^~~~~~
Language: Java

import java.util.*;
public class ABC089A {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		List<Integer> li = new ArrayList<>();
		for (int i=0; i<N; i++) {
			li.add(Integer.parseInt(sc.next()));
		}
		Collections.sort(li);
		Collections.reverse(li);
		int Alice = 0, Bob = 0;
		for (int i=0; i<N; i++) {
			System.out.println(li.get(i));
			if (i % 2 == 0) Alice += li.get(i);
			else Bob += li.get(i);
		} 
		System.out.println(Alice - Bob);
	}
}

Compiler output:
Main.java:2: error: class ABC089A is public, should be declared in a file named ABC089A.java
public class ABC089A {
       ^
1 error
Language: C++

#include <iostream>
#include <list>

using namespace std;

int main(){
	int N;
	int a[100] = {0};
	cin >> N;
	for (int i = 0; i < N; i++){
		cin >> a[i];
	}

	sort(a, a + N);

	int output = 0;
	for (int i = 0; i < N; i++)
	{
		if(!(i%2)){
			output += a[N-1-i];
		} else {
			output -= a[N-1-i];
		}
	}

	cout << output << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   14 |         sort(a, a + N);
      |         ^~~~
      |         short
Language: C

#include<stdio.h>
int main(void)
{
	unsigned int N,a[N],i=0,j=0,temp;
	unsigned int Alice=0,Bob=0;

	scanf("%d",&N);

	for(i=0;i<N;i++){
		scanf("%d ",&a[i]);
		i++;
	}
	for(i=0;i<n-1;i++){
		for(j=i;j<n-1;j++){
			if(a[j+1]>a[j]){
				temp = a[j];
				a[j] = a[j+1];
				a[j+1] = temp;
			}
		}
	}

	for(i=0;i<=N/2;i++){
		if(2*i<=N){
			Alice += a[2*i];
		}
		if(2*i+1<=N){
			Bob += a[2*i+1];
		}
	}

	printf("%d\n",Alice-Bob);

	return 0; 
}

Compiler output:
main.c: In function 'main':
main.c:13:19: error: 'n' undeclared (first use in this function)
   13 |         for(i=0;i<n-1;i++){
      |                   ^
main.c:13:19: note: each undeclared identifier is reported only once for each function it appears in