criyle/codenet-compile-errors huggingface dataset:
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];
    }

    int ans = 0;

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

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

    cout << ans << endl;
}

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;
    cin >> N;

    int a[N];

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

    int ans = 0;

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

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

    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:32: error: expected primary-expression before ';' token
   16 |     sort(a, a + N, greater<int>;
      |                                ^
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());
  reverse(a.begin(),a.end());
  int d=0;
  for(int i=0;i<n;i++){
    if(n%2==0)d+=a(i);
    else d-=a(i);
  }
  cout << d <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:26: error: expected ';' before 'a'
    8 |   for(int i=0;i<n;i++)cin a.at(i);
      |                          ^~
      |                          ;
a.cc:13:19: error: no match for call to '(std::vector<int>) (int&)'
   13 |     if(n%2==0)d+=a(i);
      |                  ~^~~
a.cc:14:14: error: no match for call to '(std::vector<int>) (int&)'
   14 |     else d-=a(i);
      |             ~^~~
Language: C++

#include <bits/stdc++.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.begin(),a.end());
  int d=0;
  for(int i=0;i<n;i++){
    if(i%2==0){
      d+=a[i];
    }else{
      d-=a[i];
    }
  }
  cout << d <<endl;
}
    
  


Compiler output:
a.cc: In function 'int main()':
a.cc:11:10: error: request for member 'begin' in 'a', which is of non-class type 'int [n]'
   11 |   sort(a.begin(),a.end());
      |          ^~~~~
a.cc:11:20: error: request for member 'end' in 'a', which is of non-class type 'int [n]'
   11 |   sort(a.begin(),a.end());
      |                    ^~~
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());
  int d=0;
  for(int i=0;i<n;i++){
    if(i%2==0){
      d+=a.at(i);
    }else{
      d-=a.at(i);
  }
  cout << d <<endl;
}
    
  


Compiler output:
a.cc: In function 'int main()':
a.cc:20:2: error: expected '}' at end of input
   20 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main(){

    int result = 0;
    int num = 0;
    cin >> num;
    int numArray[num];
    int aSum = 0;
    int bSum = 0;


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

    for (int i = 0; i < num; i++) {
        for (int j = 0; j < num; j++) {
            if (numArray[j] < numArray[i]) {
                int temp = numArray[i];
                numArray[i] = numArray[j];
                numArray[j] = temp;
            
            }
        }
    }

]
    

    for (int i = 0; i < num; i += 2) {
        aSum += numArray[i];
    }


    for (int i = 1; i < num; i += 2) {
        bSum += numArray[i];
    }

    

    cout << (aSum - bSum) << endl;
    

    
    



    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:31:1: error: expected primary-expression before ']' token
   31 | ]
      | ^
a.cc:34:21: error: 'i' was not declared in this scope
   34 |     for (int i = 0; i < num; 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());
  reverse(a.begin(), a.end());
  
  for(int i=0; i<N; i+=2){
    Alice += a.at(i);
  }
  for(int i=1; i<N; i+=2){
    Bob += a.at(i);
  }
  int ans = Alice-Bob;
  cout << ans <<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:5: error: 'Alice' was not declared in this scope
   16 |     Alice += a.at(i);
      |     ^~~~~
a.cc:19:5: error: 'Bob' was not declared in this scope
   19 |     Bob += a.at(i);
      |     ^~~
a.cc:21:13: error: 'Alice' was not declared in this scope
   21 |   int ans = Alice-Bob;
      |             ^~~~~
a.cc:21:19: error: 'Bob' was not declared in this scope
   21 |   int ans = Alice-Bob;
      |                   ^~~
Language: C++

#include <bits/stdc++.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.begin(),a.end());
  reverse(a.begin(),a.end());
  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:10:10: error: request for member 'begin' in 'a', which is of non-class type 'int [N]'
   10 |   sort(a.begin(),a.end());
      |          ^~~~~
a.cc:10:20: error: request for member 'end' in 'a', which is of non-class type 'int [N]'
   10 |   sort(a.begin(),a.end());
      |                    ^~~
a.cc:11:13: error: request for member 'begin' in 'a', which is of non-class type 'int [N]'
   11 |   reverse(a.begin(),a.end());
      |             ^~~~~
a.cc:11:23: error: request for member 'end' in 'a', which is of non-class type 'int [N]'
   11 |   reverse(a.begin(),a.end());
      |                       ^~~
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 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:10:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   10 |     sort(a.begin(), a.end(), greater<int>());
      |     ^~~~
      |     short
Language: C++

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

int main(){
  int N;
  int A=0,B=0;
  cin >> N;
  int a[N];
  for (int i=0;i<N;i++){
    cin >> a[i];
  }
  sort(a,a+N,greater);
  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:12:21: error: missing template arguments before ')' token
   12 |   sort(a,a+N,greater);
      |                     ^
Language: C++

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

int main() {
  int N;
  cin >> N;
  
  vector<int> vec(N);
  
  for(int i= 0; i < N; i++) {
    cin >> vec.at(i);
  }
  
  sort(vec.begin() , vec.end());
  reverse(vec.begin() , vec.end());
  
  int Alice = 0, Bob = 0;
  
  for(int i = 0; i < N; i++) {
  	if(i % 2 == 0) {
      Alice += vec.at(i);
    }else
      Bob += vec.at(i);
  	}
  }

	cout << Alice - Bob << endl;
  
}


Compiler output:
a.cc:27:9: error: 'cout' does not name a type
   27 |         cout << Alice - Bob << endl;
      |         ^~~~
a.cc:29:1: error: expected declaration before '}' token
   29 | }
      | ^
Language: C++

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

int main() {
  int N;
  cin >> N;
  
  vector<int> vec(N);
  
  for(int i= 0; i < N; i++) {
    cin >> vec.at(i);
  }
  
  sort(vec.begin() , vec.end());
  reverse(vec.begin() , vec.end());
  
  int Alice = 0, Bob = 0;
  
  for(int i = 0; i < N; i++) {
  	if(i % 2 == 0) {
      Alice += vec.(i);
    }else
      Bob += vec.(i);
  	}
  }

	cout << Alice - Bob << endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:20: error: expected unqualified-id before '(' token
   21 |       Alice += vec.(i);
      |                    ^
a.cc:23:18: error: expected unqualified-id before '(' token
   23 |       Bob += vec.(i);
      |                  ^
a.cc: At global scope:
a.cc:27:9: error: 'cout' does not name a type
   27 |         cout << Alice - Bob << endl;
      |         ^~~~
a.cc:29:1: error: expected declaration before '}' token
   29 | }
      | ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main(){
	int n;
  	vector<int> nums;
  
  	cin >> n;
  	int temp;
  	for(int i=0; i<n; i++){
      cin >> temp;
      nums.push_back(temp);
    }
  
  	sort(nums.begin(),nums.end(),greater<int>());
  
  	int ali = 0;
  	int bob = 0;
  
  	for(int i=0; i<n; i++){
      if(i%2 == 0){
        ali += nums[i];
      }else{
        bob += nums[i];
      }
    }
  
  	cout << ali - bob;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |         sort(nums.begin(),nums.end(),greater<int>());
      |         ^~~~
      |         short
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main(){
	int n;
  	vector<int> nums;
  
  	cin >> n;
  	int temp;
  	for(int i=0; i<n; i++){
      cin >> temp;
      nums.push_back(temp);
    }
  
  	sort(nums.begin(),nums.end(),greater<int>);
  
  	int ali = 0;
  	int bob = 0;
  
  	for(int i=0; i<n; i++){
      if(i%2 == 0){
        ali += nums[i];
      }else{
        bob += nums[i];
      }
    }
  
  	cout << ali - bob;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:50: error: expected primary-expression before ')' token
   17 |         sort(nums.begin(),nums.end(),greater<int>);
      |                                                  ^
a.cc:17:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |         sort(nums.begin(),nums.end(),greater<int>);
      |         ^~~~
      |         short
Language: C

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

int main(){
  int num;
  char str[];
  fgets(str,sizeof(str),stdin);
  num=atoi(str);
  int fig[num];
  for(int i = 0;i < num;i ++){
    fgets(str,sizeof(str),stdin);
    fig[i]=atoi(str);
  }
  int soat[num];
  int maxnum;
  for(int k = 0;k < num;k ++){
    for(int j = 0;j < num;j ++){
      if(soat[k] < fig[j]){
        soat[k] = fig[j];
        maxnum = j;
      }
    }
    fig[maxnum] = 0;
  }
  int mult = 1;
  int ans = 0;
  for(int l = 0;l < num;l ++){
    ans = ans + soat[l] * mult;
    mult = mult * (-1);
  }
  printf("%d\n",ans);
  return 0;
}
    
          

Compiler output:
main.c: In function 'main':
main.c:7:8: error: array size missing in 'str'
    7 |   char str[];
      |        ^~~
Language: C

#include <stdio.h>
#include <math.h>

int main(){
  int num;
  char str[];
  fgets(str,sizeof(str),stdin);
  num=atoi(str);
  int fig[num];
  for(int i = 0;i < num;i ++){
    fgets(str,sizeof(str),stdin);
    fig[i]=atoi(str);
  }
  int soat[num];
  int maxnum;
  for(int k = 0;k < num;k ++){
    for(int j = 0;j < num;j ++){
      if(soat[k] < fig[j]){
        soat[k] = fig[j];
        maxnum = j;
      }
    }
    fig[maxnum] = 0;
  }
  int mult = 1;
  int ans = 0;
  for(int l = 0;l < num;l ++){
    ans = ans + soat[l] * mult;
    mult = mult * (-1);
  }
  printf("%d\n",ans);
  return 0;
}
    
          

Compiler output:
main.c: In function 'main':
main.c:6:8: error: array size missing in 'str'
    6 |   char str[];
      |        ^~~
main.c:8:7: error: implicit declaration of function 'atoi' [-Wimplicit-function-declaration]
    8 |   num=atoi(str);
      |       ^~~~
Language: C

#include <stdio.h>
#include <math.h>

int main(){
  int num;
  scanf("%d",&num);
  int fig[num];
  for(int i = 0;i < num;i ++){
    scanf("%d",&fig[i]);
  }
  int soat[num];
  int maxnum;
  for(int k = 0;k < num;k ++){
    for(int j = 0;j < num;j ++){
      if(soat[k] < fig[j]){
        soat[k] = fig[j];
        maxnum = j;
      }
    }
    fig[maxnum] = 0;
  }
  int mult = 1;
  int ans = 0;
  for(int l = 0;l < num;l ++){
    ans = ans + soat[l] * mult;
    mult = mult * (-1);
  }
  printf("%d\n",ans);
    
          

Compiler output:
main.c: In function 'main':
main.c:28:3: error: expected declaration or statement at end of input
   28 |   printf("%d\n",ans);
      |   ^~~~~~
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int num = sc.nextInt();
    int[] a;
    a = new int[num];
    for(int i = 0;i < num;i ++){
      a[i] = sc.nextInt;
    }
    int[] soat;
    soat = new int[num];
    for(int j = 0;j < num;j ++){
      for(int k = 0;k < num;k ++){
        if(soat[j] < a[k]){
          soat[j] = a[k];
        }
      }
    }
    int ans = 0;
    int cal = 1;
    for(int l = 0;l < num;l ++){
      ans = ans + cal * (soat[l]);
      cal = cal * (-1);
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:10: error: cannot find symbol
      a[i] = sc.nextInt;
               ^
  symbol:   variable nextInt
  location: variable sc of type Scanner
1 error
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int num = sc.nextInt();
    int[] a;
    a = new int[num];
    for(int i = 0;i < num;i ++){
      a[i] = ac.nextInt;
    }
    int[] soat;
    soat = new int[num];
    for(int j = 0;j < num;j ++){
      for(int k = 0;k < num;k ++){
        if(soat[j] < a[k]){
          soat[j] = a[k];
        }
      }
    }
    int ans = 0;
    int cal = 1;
    for(int l = 0;l < num;l ++){
      ans = ans + cal * (soat[l]);
      cal = cal * (-1);
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:10: error: cannot find symbol
      a[i] = ac.nextInt;
             ^
  symbol:   variable ac
  location: class Main
1 error
Language: Java

import java.util.*;

public class Main{
  public static main(String[] args){
    Scanner sc = new Scanner(System.in);
    int num = sc.nextInt();
    int[] a;
    a = new int[num];
    for(int i = 0;i < num;i ++){
      a[i] = ac.nextInt;
    }
    int[] soat;
    soat = new int[num];
    for(int j = 0;j < num;j ++){
      for(int k = 0;k < num;k ++){
        if(soat[j] < a[k]){
          soat[j] = a[k];
        }
      }
    }
    int ans = 0;
    int cal = 1;
    for(int l = 0;l < num;l ++){
      ans = ans + cal * (soat[l]);
      cal = cal * (-1);
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:4: error: invalid method declaration; return type required
  public static main(String[] args){
                ^
1 error
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:15:13: error: lvalue required as left operand of assignment
   15 |         if(i%2=0){
      |            ~^~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:19: error: no match for call to '(std::vector<int>) (int&)'
    8 |         cin >> vec(i).at ;
      |                ~~~^~~
a.cc:11:16: error: no match for call to '(std::vector<int>) (int)'
   11 |     cout << vec(N-1).at - vec(0).at << endl;
      |             ~~~^~~~~
a.cc:11:30: error: no match for call to '(std::vector<int>) (int)'
   11 |     cout << vec(N-1).at - vec(0).at << endl;
      |                           ~~~^~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:19: error: no match for call to '(std::vector<int>) (int&)'
    8 |         cin >> vec(i).at ;
      |                ~~~^~~
a.cc:11:16: error: no match for call to '(std::vector<int>) (int)'
   11 |     cout << vec(N-1) - vec(0) << endl;
      |             ~~~^~~~~
a.cc:11:27: error: no match for call to '(std::vector<int>) (int)'
   11 |     cout << vec(N-1) - vec(0) << endl;
      |                        ~~~^~~
Language: C++

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

int main() {
  int N, a[109];
  cin>>N;
  for(int i=0; i<N; i++) {
    cin >> a[i];
  }
  sort(a.begin(), a.end());
  reverse(a.begin(), a.end());
  int x, y;
  x=0;
  y=0;
  for(int i=0; i<N; i++) {
    if(i%2 == 0){
      x += a[i];
    }else {
      y += a[i];
    }
  }
  int result;
  result = x-y;
  cout << result << endl;
}


Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>N;
      |   ^~~
a.cc:10:10: error: request for member 'begin' in 'a', which is of non-class type 'int [109]'
   10 |   sort(a.begin(), a.end());
      |          ^~~~~
a.cc:10:21: error: request for member 'end' in 'a', which is of non-class type 'int [109]'
   10 |   sort(a.begin(), a.end());
      |                     ^~~
a.cc:10:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   10 |   sort(a.begin(), a.end());
      |   ^~~~
      |   short
a.cc:11:13: error: request for member 'begin' in 'a', which is of non-class type 'int [109]'
   11 |   reverse(a.begin(), a.end());
      |             ^~~~~
a.cc:11:24: error: request for member 'end' in 'a', which is of non-class type 'int [109]'
   11 |   reverse(a.begin(), a.end());
      |                        ^~~
a.cc:11:3: error: 'reverse' was not declared in this scope
   11 |   reverse(a.begin(), a.end());
      |   ^~~~~~~
a.cc:24:3: error: 'cout' was not declared in this scope
   24 |   cout << result << endl;
      |   ^~~~
a.cc:24:21: error: 'endl' was not declared in this scope
   24 |   cout << result << endl;
      |                     ^~~~
Language: C++

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

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

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:5:3: error: 'vector' was not declared in this scope
    5 |   vector<int>a;
      |   ^~~~~~
a.cc:5:10: error: expected primary-expression before 'int'
    5 |   vector<int>a;
      |          ^~~
a.cc:7:3: error: 'cin' was not declared in this scope
    7 |   cin>>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.begin(), a.end());
      |        ^
a.cc:11:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |   sort(a.begin(), a.end());
      |   ^~~~
      |   short
a.cc:12:3: error: 'reverse' was not declared in this scope
   12 |   reverse(a.begin(), a.end());
      |   ^~~~~~~
a.cc:25:3: error: 'cout' was not declared in this scope
   25 |   cout << result << endl;
      |   ^~~~
a.cc:25:21: error: 'endl' was not declared in this scope
   25 |   cout << result << endl;
      |                     ^~~~
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main() {
    int N;
    int a[120];
    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;

    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>()); //a[0:N] を大きい順にソート
      |     ^~~~
      |     short
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:13:15: error: 'class std::vector<int>' has no member named 'begein'; did you mean 'begin'?
   13 |   reverse(vec.begein(), vec.end());
      |               ^~~~~~
      |               begin
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: 'i' was not declared in this scope
    8 |   for( i = 0; i < N; i++ ) {
      |        ^
a.cc:13:15: error: 'class std::vector<int>' has no member named 'begein'; did you mean 'begin'?
   13 |   reverse(vec.begein(), vec.end());
      |               ^~~~~~
      |               begin
a.cc:16:8: error: 'i' was not declared in this scope
   16 |   for( i = 0; i < N; i += 2 )
      |        ^
a.cc:18:8: error: 'i' was not declared in this scope
   18 |   for( i = 1; i < N; i += 2 )
      |        ^
Language: C++

N = int(input())
a = list(map(int, input().split()))
alice_point = 0
bob_point = 0
a.sort(reverse=True)
for i in range(N):
    if i % 2 == 0:
        alice_point += a[i]
    else:
        bob_point += a[i]
print(alice_point-bob_point)

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

#include<stdio.h>
int main(void){

    int N,i,a,j,tmp;

    scanf("%d",N);

    for(i=0;i=N;i++){
        scanf("%d",a[i]);

    }

    for(i=0;i<N;i++){
        for(j=i+1;j<N;i++){
            if(a[i]>a[j]){
                tmp=a[i];
                a[i]=a[j];
                a[j]=tmp;
            }
        }
    }

    int Alice,Bob;

    for(i=0;i=N;i2+){

        Alice+=a[i];
        Bob+=a[i+1];
    }

    answer=Alice-Bob;

    printf("%d\n",answer);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:21: error: invalid types 'int[int]' for array subscript
    9 |         scanf("%d",a[i]);
      |                     ^
a.cc:15:17: error: invalid types 'int[int]' for array subscript
   15 |             if(a[i]>a[j]){
      |                 ^
a.cc:15:22: error: invalid types 'int[int]' for array subscript
   15 |             if(a[i]>a[j]){
      |                      ^
a.cc:16:22: error: invalid types 'int[int]' for array subscript
   16 |                 tmp=a[i];
      |                      ^
a.cc:17:18: error: invalid types 'int[int]' for array subscript
   17 |                 a[i]=a[j];
      |                  ^
a.cc:17:23: error: invalid types 'int[int]' for array subscript
   17 |                 a[i]=a[j];
      |                       ^
a.cc:18:18: error: invalid types 'int[int]' for array subscript
   18 |                 a[j]=tmp;
      |                  ^
a.cc:25:17: error: 'i2' was not declared in this scope; did you mean 'i'?
   25 |     for(i=0;i=N;i2+){
      |                 ^~
      |                 i
a.cc:25:20: error: expected primary-expression before ')' token
   25 |     for(i=0;i=N;i2+){
      |                    ^
a.cc:27:17: error: invalid types 'int[int]' for array subscript
   27 |         Alice+=a[i];
      |                 ^
a.cc:28:15: error: invalid types 'int[int]' for array subscript
   28 |         Bob+=a[i+1];
      |               ^
a.cc:31:5: error: 'answer' was not declared in this scope
   31 |     answer=Alice-Bob;
      |     ^~~~~~
Language: C++

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

int main(){
	int n,i,alith,bob;
	int a[100];
	
	sort(a,a+n);
	reverce(a,a+n);
	
	for(i=0;i<n;i+=2){
		alith+=a[i];
		bob+=a[i+1];
	}
	
	cout << alith-bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'reverce' was not declared in this scope
   10 |         reverce(a,a+n);
      |         ^~~~~~~
Language: C++

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

int main(){
	int n,i,alith,bob;
	int a[100];
	
	sort(a,a+n);
	reverce(a,a+n);
	
	for(i=0;i<n;i+=2){
		alith+=a[i];
		bob+=a[i+1];
	}
	
	cout << alith-bob << endl;
}


Compiler output:
a.cc:2:9: fatal error: algolithm: No such file or directory
    2 | #include<algolithm>
      |         ^~~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main(){

    //入力部
    int n;
    int a[100];
    REP(i,n)cin >> a[i];

    //計算部
    sort(a,a+n); //ソート関数でソートします(今回の配列長ならバブルソートでも可)
    int even = 0, odd = 0; //偶数、奇数それぞれの要素の総和を格納する変数を用意
    for(int i=0;i<n;i++){
        if(i%2) odd += a[i]; // 奇数個目の要素なら
        else even += a[i]; // 偶数個目の要素なら
    }
    cout << even-odd << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'i' was not declared in this scope
    9 |     REP(i,n)cin >> a[i];
      |         ^
a.cc:9:5: error: 'REP' was not declared in this scope
    9 |     REP(i,n)cin >> a[i];
      |     ^~~
Language: C++

#include <iostream>
#include<math.h>
#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];
    }

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

    // 降順
    // sort(a.begin(), a.end(), [](const int x, const int y) { return x > y; });
    sort(a.begin(), a.end(), greater<int>());  // a[0:N] を大きい順にソート

    int alice = 0;
    int bob = 0;
    for (int j = 0; j < N; ++j) {
        if (j % 2 == 0) {
            alice += a[j];
        } else {
            bob += a[j];
        }
    }

    cout << alice - bob << endl;
}


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>());  // a[0:N] を大きい順にソート
      |     ^~~~
      |     sqrt
Language: C++

#include <iostream>
#include<math.h>
#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];
    }

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

    // 降順
    sort(a.begin(), a.end(), [](const int x, const int y) { return x > y; });

    int alice = 0;
    int bob = 0;
    for (int j = 0; j < N; ++j) {
        if (j % 2 == 0) {
            alice += a[j];
        } else {
            bob += a[j];
        }
    }

    cout << alice - bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   20 |     sort(a.begin(), a.end(), [](const int x, const int y) { return x > y; });
      |     ^~~~
      |     sqrt
Language: C++

#include <iostream>
#include<math.h>
#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];
    }

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

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

    int alice = 0;
    int bob = 0;
    for (int j = 0; j < N; ++j) {
        if (j % 2 == 0) {
            alice += a[j];
        } else {
            bob += a[j];
        }
    }

    cout << alice - bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   20 |     sort(a.begin(), a.end(), greater<int>());
      |     ^~~~
      |     sqrt
Language: C++

#include <iostream>
#include<math.h>
#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];
    }

    // 昇順
    //sort(a.begin(), a.end());
    
    // 降順
    sort(a.begin(), a.end(), greater<>());

    int alice = 0;
    int bob = 0;
    for (int j = 0; j < N; ++j) {
        if (j % 2 == 0) {
            alice += a[j];
        } else {
            bob += a[j];
        }
    }

    cout << alice - bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   20 |     sort(a.begin(), a.end(), greater<>());
      |     ^~~~
      |     sqrt
Language: C++

#include <iostream>
using namespace std;

int N;
int a[110];

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

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

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

  int res = A - B;
  cout << res << '\n';
}

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

#include<stdio.h>



int maxsort(int a[],int sort[],int N );


int main(){
	
	int i,N,a[110],sort[110],alice=0,bob=0;
	scanf("%d",&N);
	scanf("%d",a);
	
	maxsort(a,sort,N);
	
	if(N%2==0){
	for(i=1;i<=N/2;i++){
		alice+=sort[2i-1];
		bob+=sort[2i];
	}
	}else {
		for(i=1;i<=(N-1)/2;i++){
		alice+=sort[2i-1];
		bob+=sort[2i];
	}
	alice+=sort[N];	
		
	}
	
	
	
	
	printf("\n%d\n\n",alice-bob);
	
	
	return 0;
}


int maxsort(int a[],int sort[],int N ){
	
	int i,j,max;
	sort[0]=110;
	
	for(i=1;i<=N;i++){
		for(j=0;j<N;j++){
			max=0;
			if(sort[i-1]>=a[j]&&a[j]>max){
				max=a[j];
				
			}
			sort[i]=max;
			
		}
	}
}
	
	
	

Compiler output:
main.c: In function 'main':
main.c:18:28: error: array subscript is not an integer
   18 |                 alice+=sort[2i-1];
      |                            ^
main.c:19:26: error: array subscript is not an integer
   19 |                 bob+=sort[2i];
      |                          ^
main.c:23:28: error: array subscript is not an integer
   23 |                 alice+=sort[2i-1];
      |                            ^
main.c:24:26: error: array subscript is not an integer
   24 |                 bob+=sort[2i];
      |                          ^
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:16:10: error: expected ';' before '}' token
   16 |     cnt++
      |          ^
      |          ;
   17 |   }
      |   ~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:14:13: error: lvalue required as left operand of assignment
   14 |     if (cnt % 2 = 0) alice += arr[i];
      |         ~~~~^~~
a.cc:16:10: error: expected ';' before '}' token
   16 |     cnt++
      |          ^
      |          ;
   17 |   }
      |   ~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:13:3: error: expected ',' or ';' before 'for'
   13 |   for (int i =N-1; i >= 0; i--) {
      |   ^~~
a.cc:13:20: error: 'i' was not declared in this scope
   13 |   for (int i =N-1; i >= 0; i--) {
      |                    ^
Language: C++

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

int main(){
    int N ,sum; cin >> N;
    vector<int> a;

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

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

    int Alice=0, Bob;

    for (int i=0; i < N ; i+=2 ) Alice+=a.at(i);

    Bob=sum-Alice;

    cout << Alice-Bob << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: expected ';' before '}' token
   10 |         sum+=i
      |               ^
      |               ;
   11 |     }
      |     ~
Language: C++

#include <iostream>
using namespace std;

#define SIZE_OF_ARRAY(array) (sizeof(array)/sizeof(array[0]))

long long N, A[110], als, bob;

int main() {
	cin >> N;
	for (int i = 0; i < N; i++) {
		cin >> A[i];
	}
	
	sort(A, A + SIZE_OF_ARRAY(A), greater<long long>());
	
	als += A[0];
	for (int i = 1; i < N; i++) {
		if (i % 2 == 0) {
			als += A[i];
		} else {
			bob += A[i];
		}
	}
	
	cout << als - bob << 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 + SIZE_OF_ARRAY(A), greater<long long>());
      |         ^~~~
      |         short
Language: C++

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

int main() {
  int N;
  cin >> N;
  vector <int> card(N);
  fot (int i=0;i<N;i++)
  {
    cin >> card[i];
  }
  sort (card.begin(),card.end());
  int alice=0,bob=0;
  for (int i=0;i<N;i++)
  {
    if (i%2 == 0)
    {
      alice += card[i];
    }
    if (i%2 == 1)
    {
      bob += card[i];
    }
  }
  cout << alice - bob << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: expected primary-expression before 'int'
    8 |   fot (int i=0;i<N;i++)
      |        ^~~
a.cc:8:16: error: 'i' was not declared in this scope
    8 |   fot (int i=0;i<N;i++)
      |                ^
Language: C++

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

int main() {
  int N,cnt=0;
  cin >> N;
  vrctor<int> vec(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++) {
    if(i%2==0) {
      cnt+=vec[i];
    }
    else {
      cnt-=vec[i];
    }
  }
  cout << cnt << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'vrctor' was not declared in this scope
    7 |   vrctor<int> vec(N);
      |   ^~~~~~
a.cc:7:10: error: expected primary-expression before 'int'
    7 |   vrctor<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());
      |        ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N,zantei,Alice,Bob;
  cin >> N;
  
  vector<int> card(101);
  cin >> card.at(0);
  
  for(int i=1;i<N;i++) {
    cin >> zantei;
    
    for(int j=i-1;j=>0;j--) {
      if(zantei => card.at(j)) {
        card.at(j+1) = card.at(j);
      }
      else {
        card.at(j) = zantei;
        break;
      }
    }
  }
  
  for(int i=0;i<N;i += 2) {
    Alice += card.at(i);
  }
  
  for(int i=1;i<N;i += 2) {
    Bob += card.at(i);
  }
  
  cout << Alice - Bob << endl;
}
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:14:21: error: expected primary-expression before '>' token
   14 |     for(int j=i-1;j=>0;j--) {
      |                     ^
a.cc:15:18: error: expected primary-expression before '>' token
   15 |       if(zantei => card.at(j)) {
      |                  ^
Language: C++

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

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

  for (int i = 0; i < N; i++) {
    if (i % 2 == 0) P += vec.at(i)
    if (i % 2 == 1) P -= vec.at(i)
  }
  
  cout << P << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:35: error: expected ';' before 'if'
   15 |     if (i % 2 == 0) P += vec.at(i)
      |                                   ^
      |                                   ;
   16 |     if (i % 2 == 1) P -= vec.at(i)
      |     ~~
Language: C++

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

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

  for (int i = 0; i < N; i++) {
    if (i % 2 == 0) P += vec.at(i)
    else P -= vec.at(i)
  }
  
  cout << P << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:35: error: expected ';' before 'else'
   15 |     if (i % 2 == 0) P += vec.at(i)
      |                                   ^
      |                                   ;
   16 |     else P -= vec.at(i)
      |     ~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:11:31: error: expected ';' before 'int'
   11 |   reverse (a.begin(), a.end())
      |                               ^
      |                               ;
   12 |   int A=0,B=0;
      |   ~~~                          
a.cc:15:7: error: 'A' was not declared in this scope
   15 |       A+=a.at(i);
      |       ^
a.cc:17:7: error: 'B' was not declared in this scope
   17 |       B+=a.at(i);
      |       ^
a.cc:19:9: error: 'A' was not declared in this scope
   19 |   cout<<A-B<<endl;
      |         ^
a.cc:19:11: error: 'B' was not declared in this scope
   19 |   cout<<A-B<<endl;
      |           ^
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);
  }
  
  for (int i = 0; i < n; i++) {
    int a = A.at(0);
    for (int j = 1; j < n; j++) {
     int b = A.at(j);
      if (a < b) {
        int temp;
        temp = b;
        b = a;#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);
  }
  
  for (int i = 0; i < n; i++) {
    int a = A.at(0);
    for (int j = 1; j < n; j++) {
     int b = A.at(j);
      if (a < b) {
        A.at(j) = a;
        A.at(j - 1) = b;
      }
      else {
        a = b;
      }
    }
  }
  
  int sub = 0;
  for (int i = 0; i < n; i++) {
    int a = A.at(i);
    if (i % 2 == 0) {
      sub += a;
    }
    if (i % 2 == 1) {
      sub -= a;
    }
  }
  
  cout << sub << endl;
}

        a = temp;
      }
      else {
        a = b;
      }
    }
  }
  
  int sub = 0;
  for (int i = 0; i < n; i++) {
    int a = A.at(i);
    if (i % 2 == 0) {
      sub += a;
    }
    if (i % 2 == 1) {
      sub -= a;
    }
  }
  
  cout << sub << endl;
}


Compiler output:
a.cc:19:15: error: stray '#' in program
   19 |         b = a;#include <bits/stdc++.h>
      |               ^
a.cc: In function 'int main()':
a.cc:19:16: error: 'include' was not declared in this scope
   19 |         b = a;#include <bits/stdc++.h>
      |                ^~~~~~~
a.cc:19:25: error: 'bits' was not declared in this scope
   19 |         b = a;#include <bits/stdc++.h>
      |                         ^~~~
a.cc:19:30: error: 'stdc' was not declared in this scope; did you mean 'std'?
   19 |         b = a;#include <bits/stdc++.h>
      |                              ^~~~
      |                              std
a.cc:20:1: error: expected primary-expression before 'using'
   20 | using namespace std;
      | ^~~~~
a.cc:22:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   22 | int main() {
      |         ^~
a.cc:22:9: note: remove parentheses to default-initialize a variable
   22 | int main() {
      |         ^~
      |         --
a.cc:22:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:22:12: error: a function-definition is not allowed here before '{' token
   22 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  // ここにプログラムを追記
  int n;
  cin >> n;
  vector<int> a(n);
  int sumA = 0;
  int sumB = 0;
  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){
    sumA += a.(i);
  }
  for(int i = 1 i < n; i += 2){
    sumB +=a.(i);
  }
  cout << sumA-sumB <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:14: error: expected unqualified-id before '(' token
   12 |     cin >> a.(i);
      |              ^
a.cc:17:15: error: expected unqualified-id before '(' token
   17 |     sumA += a.(i);
      |               ^
a.cc:19:16: error: expected ';' before 'i'
   19 |   for(int i = 1 i < n; i += 2){
      |                ^~
      |                ;
a.cc:20:14: error: expected unqualified-id before '(' token
   20 |     sumB +=a.(i);
      |              ^
Language: C++

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

int main() {
  int n;
  cin >> n;
  vector<int> A(n);
  for (int i = 0; i < n; i++) {
    cin >> A.at(i);
  }
  
  for (int i = 0; i < N - 1; i++) {
    int a = A.at(i);
    for (int j = i + 1; j < N - 1; j++) {
      if (a < A.at(j)) {
        int temp;
        temp = A.at(j);
        A.at(j) = a;
        a = temp;
      }
      else {
        a = A.at(j);
      }
    }
  }
  
  int sub = 0;
  for (int i = 0; i < N; i++) {
    int a = A.at(i);
    if (i % 2 == 0) {
      sub += a;
    }
    if (i % 2 == 1) {
      sub -= a;
    }
  }
  
  cout << sub << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:23: error: 'N' was not declared in this scope
   12 |   for (int i = 0; i < N - 1; i++) {
      |                       ^
a.cc:28:23: error: 'N' was not declared in this scope
   28 |   for (int i = 0; i < N; i++) {
      |                       ^
Language: C++

void swap(int& a, int& b);

int main(){
    int N;
    std::cin >> N;
    
    int cards[N];
    for(int i = 0; i < N; i++){
        std::cin >> cards[i];
    }
    
    int sum_A = 0;
    int sum_B = 0;
    
    for(int i = 0; i < N - 1; i++){
        for(int j = 0; j < N - (i + 1); j++){
            if(cards[i] < cards[i + j + 1]){
                swap(cards[i], cards[i + j + 1]);
            }
        }
    }
    for(int i = 0; i < N; i++){
        if(i % 2 == 0){
            sum_A += cards[i];
        }else{
            sum_B += cards[i];
        }
    }
    std::cout << sum_A - sum_B;
}

void swap(int& a, int& b){
    int c = a;
    a = b;
    b = c;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:10: error: 'cin' is not a member of 'std'
    5 |     std::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 | void swap(int& a, int& b);
a.cc:9:14: error: 'cin' is not a member of 'std'
    9 |         std::cin >> cards[i];
      |              ^~~
a.cc:9:14: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:29:10: error: 'cout' is not a member of 'std'
   29 |     std::cout << sum_A - sum_B;
      |          ^~~~
a.cc:29:10: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:15: error: conflicting declaration 'std::vector<int> a'
    7 |   vector<int> a(n);
      |               ^
a.cc:5:9: note: previous declaration as 'int a'
    5 |   int n,a,b;
      |         ^
a.cc:8:30: error: request for member 'at' in 'a', which is of non-class type 'int'
    8 |   for(int i=0;i<n;i++)cin>>a.at(i);
      |                              ^~
a.cc:10:10: error: request for member 'begin' in 'a', which is of non-class type 'int'
   10 |   sort(a.begin(),a.end());
      |          ^~~~~
a.cc:10:20: error: request for member 'end' in 'a', which is of non-class type 'int'
   10 |   sort(a.begin(),a.end());
      |                    ^~~
a.cc:12:20: error: request for member 'at' in 'a', which is of non-class type 'int'
   12 |     if(i%2==0)a+=a.at(i);
      |                    ^~
a.cc:13:15: error: request for member 'at' in 'a', which is of non-class type 'int'
   13 |     else b+=a.at(i);
      |               ^~
Language: Java

import java.util.*;
import java.io.*;

public class B88 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int a[] = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = Integer.parseInt(sc.next());
        }

        Sort(a);

        int alice = 0;
        int 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);

        sc.close();
    }

    static void Sort(int[] array) {
        for (int i = 0; i < array.length - 1; i++) {
            for (int j = array.length - 1; j > i; j--) {
                if (array[i] < array[j]) {
                    int tem = array[i];
                    array[i] = array[j];
                    array[j] = tem;
                }
            }
        }
    }
}

Compiler output:
Main.java:4: error: class B88 is public, should be declared in a file named B88.java
public class B88 {
       ^
1 error
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:15:13: error: 'bob' was not declared in this scope
   15 |   int alice=bob=0;
      |             ^~~
Language: C++

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

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:13:21: error: 'aend' was not declared in this scope
   13 |   reverse(a.begin(),aend())
      |                     ^~~~
a.cc:14:18: error: 'i' was not declared in this scope
   14 |   for(int i = 0; i < N; i+=2){
      |                  ^