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

#include <iostream>
using namespace std;
int main() {
	int N , Bob, Alice, i;
	cin >> N;
	i = N;
	int a[N];
	for (i = N; i > 0; i--); {
		cin >> a[N];
	}
	sort(a.begin(), a.end());
	reverse(a.begin(), a.end());
	
	for (N = 0; N < i; N += 2); {
		Alice+=a[N]
	}
	for (N = 1; N < i; N += 2); {
		Bob+=a[N]
	}
	cout << Alice - Bob << endl;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: request for member 'begin' in 'a', which is of non-class type 'int [N]'
   11 |         sort(a.begin(), a.end());
      |                ^~~~~
a.cc:11:27: error: request for member 'end' in 'a', which is of non-class type 'int [N]'
   11 |         sort(a.begin(), a.end());
      |                           ^~~
a.cc:11:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |         sort(a.begin(), a.end());
      |         ^~~~
      |         short
a.cc:12:19: error: request for member 'begin' in 'a', which is of non-class type 'int [N]'
   12 |         reverse(a.begin(), a.end());
      |                   ^~~~~
a.cc:12:30: error: request for member 'end' in 'a', which is of non-class type 'int [N]'
   12 |         reverse(a.begin(), a.end());
      |                              ^~~
a.cc:12:9: error: 'reverse' was not declared in this scope
   12 |         reverse(a.begin(), a.end());
      |         ^~~~~~~
a.cc:15:28: error: expected ';' before '}' token
   15 |                 Alice+=a[N]
      |                            ^
      |                            ;
   16 |         }
      |         ~                   
a.cc:18:26: error: expected ';' before '}' token
   18 |                 Bob+=a[N]
      |                          ^
      |                          ;
   19 |         }
      |         ~
Language: C++

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

int main() {
int a,N;
int point[2];
  point[0]=0;
  point[1]=0;
  
  cin >> N;
  vector<int> vec ;
  for(int i=0;i<N;i++){
cin >> a;
    vec.insert(vec.begin() i, a);
  }
        
    sort(vec.begin(), vec.end());
    reverse(vec.begin(), vec.end());

    for (int i = 0; i < vec.size(); i++) {
      int t;
      t=i%2;
      point[t]+= vec.at(i) ;
    }
  cout<<max(point[0],point[1])-min(point[0],point[1])<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:27: error: expected ')' before 'i'
   14 |     vec.insert(vec.begin() i, a);
      |               ~           ^~
      |                           )
Language: C++

#include <iostream>

using namespace std;

int main() {
    int n, *a;
    cin >> n;
    a = new int[n];
    int i;
    for (i = 0; i < n; i++) 
        cin >> a[i];
    
    int j;
    for (i = 0; i < n; i++) {
        for (j = n-1; j > i; j--) {
            if (a[j] > a[j-1]) {
                int tmp = a[j-1];
                a[j-1] = a[j];
                a[j] = tmp;
            }
        }
    }
    int alice = 0, bob = 0;
    for (i = 0; i < n; i += 2)
        alice += a[i]
    for (i = 1; i < n; i += 2)
        bob += a[i];
    cout << alice - bob << endl;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:22: error: expected ';' before 'for'
   25 |         alice += a[i]
      |                      ^
      |                      ;
   26 |     for (i = 1; i < n; i += 2)
      |     ~~~               
a.cc:26:30: error: expected ';' before ')' token
   26 |     for (i = 1; i < n; i += 2)
      |                              ^
      |                              ;
Language: C++

#include <iostream>
using namespace std;

int main(){
  int N;cin>>N;
  int A[105];
  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:9:3: error: 'sort' was not declared in this scope; did you mean 'short'?
    9 |   sort(A,A+N,greater<int>());
      |   ^~~~
      |   short
Language: C++

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

Compiler output:
a.cc:3:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    3 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:5:12: error: expected primary-expression before 'int'
    5 |     cin >> int N;
      |            ^~~
a.cc:6:21: error: 'N' was not declared in this scope
    6 |     vector<int> vec(N);
      |                     ^
a.cc: At global scope:
a.cc:13:5: error: 'a' does not name a type
   13 |     a = 0;
      |     ^
a.cc:14:5: error: 'b' does not name a type
   14 |     b = 0;
      |     ^
a.cc:15:5: error: expected unqualified-id before 'for'
   15 |     for(int i = 0; i < N; i++){
      |     ^~~
a.cc:15:20: error: 'i' does not name a type
   15 |     for(int i = 0; i < N; i++){
      |                    ^
a.cc:15:27: error: 'i' does not name a type
   15 |     for(int i = 0; i < N; i++){
      |                           ^
a.cc:23:5: error: 'cout' does not name a type
   23 |     cout << a - b << endl;
      |     ^~~~
a.cc:24:1: error: expected declaration before '}' token
   24 | }
      | ^
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'revers' was not declared in this scope
   12 |   revers(a.begin(),a.end());
      |   ^~~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:20:12: error: 'max' cannot be used as a function
   20 |   max = max(A, B);
      |         ~~~^~~~~~
a.cc:21:12: error: 'min' cannot be used as a function
   21 |   min = min(A, B);
      |         ~~~^~~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: no match for call to '(std::vector<int>) (int&)'
    9 |     cin >> X(i);
      |            ~^~~
a.cc:20:12: error: 'max' cannot be used as a function
   20 |   max = max(A, B);
      |         ~~~^~~~~~
a.cc:21:12: error: 'min' cannot be used as a function
   21 |   min = min(A, B);
      |         ~~~^~~~~~
Language: C++

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

int main () {
  int N, A = 0, B = 0, min, max;
  cin >> N;
  vector<int> X(N);
  for (int i = 0; i < N; i++) {
    cin >> X(i);
  }
  sort(X.begin(), X.end());
  for (int i = 0; i < N; i++) {
    if (i % 2 == 0) {
      A += X(i);
    }
    else{
      B += X(i);
    }
  }
  max = max(A, B);
  min = min(A, B);
  cout << max - min;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: no match for call to '(std::vector<int>) (int&)'
    9 |     cin >> X(i);
      |            ~^~~
a.cc:14:13: error: no match for call to '(std::vector<int>) (int&)'
   14 |       A += X(i);
      |            ~^~~
a.cc:17:13: error: no match for call to '(std::vector<int>) (int&)'
   17 |       B += X(i);
      |            ~^~~
a.cc:20:12: error: 'max' cannot be used as a function
   20 |   max = max(A, B);
      |         ~~~^~~~~~
a.cc:21:12: error: 'min' cannot be used as a function
   21 |   min = min(A, B);
      |         ~~~^~~~~~
Language: C++

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

int main () {
  int N, A = 0, B = 0;
  cin >> N;
  vector<int> X(N);
  for (int i = 0; i < N; i++) {
    cin >> X(i);
  }
  sort(X.begin(), X.end());
  for (int i = 0; i < N; i++) {
    if (i % 2 == 0) {
      A += X(i);
    }
    else{
      B += X(i);
    }
  }
  cout << max(A, B) - min(A, B);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: no match for call to '(std::vector<int>) (int&)'
    9 |     cin >> X(i);
      |            ~^~~
a.cc:14:13: error: no match for call to '(std::vector<int>) (int&)'
   14 |       A += X(i);
      |            ~^~~
a.cc:17:13: error: no match for call to '(std::vector<int>) (int&)'
   17 |       B += X(i);
      |            ~^~~
Language: C++

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

int main () {
  int N, A = 0, B = 0;
  cin >> N;
  vector<int> X(N);
  for (int i = 0; i < N; i++) {
    cin >> X(i);
  }
  sort(X.begin(), X.end());
  for (int i = 0; i < N; i++) {
    if (i % 2 == 0) {
      A += X(i)
    }
    else{
      B += X(i)
    }
  }
  cout << max(A, B) - min(A, B);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: no match for call to '(std::vector<int>) (int&)'
    9 |     cin >> X(i);
      |            ~^~~
a.cc:14:13: error: no match for call to '(std::vector<int>) (int&)'
   14 |       A += X(i)
      |            ~^~~
a.cc:17:13: error: no match for call to '(std::vector<int>) (int&)'
   17 |       B += X(i)
      |            ~^~~
Language: C++

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

int main() {
  int N;
  cin>>N;
  vector<int>S(N);
  for(int i=0; i<N; i++){
    cin>>S.at(i);
  }
 sort(S.begin(),S.end());
  int A=0;
  int B=0;
  for(int j=0; j<N;ji++){
A+=S.at(0+2*j);
    B+=S.at(1+2*j);
  }
  cout<<A-B<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:20: error: 'ji' was not declared in this scope; did you mean 'j'?
   14 |   for(int j=0; j<N;ji++){
      |                    ^~
      |                    j
Language: C++

#include<iostream>
using namespace std;
int main()
{
    int n;
    cin >> n;
    
    // CardData
    int card_num[100];
    for(int i=0;i<n;i++){
        cin >> card_num[i];
    }

    int alice_pt = 0;
    int bob_pt   = 0;
    for(int j=0;j<n;j++){
        if(j % 2 == 0){
            alice_pt = alice_pt + card_num[j];
        } else {
            bob_pt = bob_pt + card_num[j];
        }
    }
    
    cout << (alice_pt - bob_pt)) << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:32: error: expected ';' before ')' token
   24 |     cout << (alice_pt - bob_pt)) << endl;
      |                                ^
      |                                ;
Language: C++

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

int main() {
  int n,a=0,count=0;
  cin>>n;
  vector<int> score(n);
  for(int i=0;i<n;i++)cin>>score[i];
  for(int i=0;i<n){
    int maxscore=0,x=-1;
    for(int j=0;j<n;j++){
      if(maxscore<score[j]){
        maxscore=score[j];
        x=j;
      }
    }
    if(x>-1)score[x]=0;
    a+=(-2*(i%2)+1)*maxscore;
  }
  cout<<a<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:18: error: expected ';' before ')' token
    9 |   for(int i=0;i<n){
      |                  ^
      |                  ;
Language: C++

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

int main() {
  int n,a=0,count=0;
  cin>>n;
  vector<int> score(n);
  for(int i=0;i<n;i++)cin>>score[i];
  for(int i=0;i<n){
    int maxscore=0,x=-1;
    for(int j=0;j<n;j++){
      if(maxscore<score[j]){
        maxscore=score[j];
        x=j
      }
    }
  if(x>-1)score[x]=0;
    a+=(-2*(i%2)+1)*maxscore;
  }
  cout<<a<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:18: error: expected ';' before ')' token
    9 |   for(int i=0;i<n){
      |                  ^
      |                  ;
a.cc:14:12: error: expected ';' before '}' token
   14 |         x=j
      |            ^
      |            ;
   15 |       }
      |       ~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> N;
      |   ^~~
a.cc:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> a(N);
      |   ^~~~~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> a(N);
      |          ^~~
a.cc:6:12: error: 'a' was not declared in this scope
    6 |     cin >> a.at(i);
      |            ^
a.cc:8:8: error: 'sort' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |        ^~~~
a.cc:8:13: error: 'a' was not declared in this scope
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |             ^
a.cc:8:36: error: 'greater' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                    ^~~~~~~
a.cc:8:44: error: expected primary-expression before 'int'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                            ^~~
a.cc:17:3: error: 'cout' was not declared in this scope
   17 |   cout << c << endl;
      |   ^~~~
a.cc:17:16: error: 'endl' was not declared in this scope
   17 |   cout << c << endl;
      |                ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> N;
      |   ^~~
a.cc:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> a(N);
      |   ^~~~~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> a(N);
      |          ^~~
a.cc:6:12: error: 'a' was not declared in this scope
    6 |     cin >> a.at(i);
      |            ^
a.cc:8:8: error: 'sort' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |        ^~~~
a.cc:8:13: error: 'a' was not declared in this scope
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |             ^
a.cc:8:36: error: 'greater' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                    ^~~~~~~
a.cc:8:44: error: expected primary-expression before 'int'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                            ^~~
a.cc:15:3: error: 'cout' was not declared in this scope
   15 |   cout << c << endl;
      |   ^~~~
a.cc:15:16: error: 'endl' was not declared in this scope
   15 |   cout << c << endl;
      |                ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> N;
      |   ^~~
a.cc:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> a(N);
      |   ^~~~~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> a(N);
      |          ^~~
a.cc:6:12: error: 'a' was not declared in this scope
    6 |     cin >> a.at(i);
      |            ^
a.cc:8:8: error: 'sort' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |        ^~~~
a.cc:8:13: error: 'a' was not declared in this scope
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |             ^
a.cc:8:36: error: 'greater' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                    ^~~~~~~
a.cc:8:44: error: expected primary-expression before 'int'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                            ^~~
a.cc:17:3: error: 'cout' was not declared in this scope
   17 |   cout << c << endl;
      |   ^~~~
a.cc:17:16: error: 'endl' was not declared in this scope
   17 |   cout << c << endl;
      |                ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> N;
      |   ^~~
a.cc:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> a(N);
      |   ^~~~~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> a(N);
      |          ^~~
a.cc:6:12: error: 'a' was not declared in this scope
    6 |     cin >> a.at(i);
      |            ^
a.cc:8:8: error: 'sort' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |        ^~~~
a.cc:8:13: error: 'a' was not declared in this scope
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |             ^
a.cc:8:36: error: 'greater' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                    ^~~~~~~
a.cc:8:44: error: expected primary-expression before 'int'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                            ^~~
a.cc:17:3: error: 'cout' was not declared in this scope
   17 |   cout << c << endl;
      |   ^~~~
a.cc:17:16: error: 'endl' was not declared in this scope
   17 |   cout << c << endl;
      |                ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> N;
      |   ^~~
a.cc:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> a(N);
      |   ^~~~~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> a(N);
      |          ^~~
a.cc:6:12: error: 'a' was not declared in this scope
    6 |     cin >> a.at(i);
      |            ^
a.cc:8:8: error: 'sort' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |        ^~~~
a.cc:8:13: error: 'a' was not declared in this scope
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |             ^
a.cc:8:36: error: 'greater' is not a member of 'std'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                    ^~~~~~~
a.cc:8:44: error: expected primary-expression before 'int'
    8 |   std::sort(a.begin(),a.end(),std::greater<int>());
      |                                            ^~~
a.cc:15:3: error: 'cout' was not declared in this scope
   15 |   cout << c << endl;
      |   ^~~~
a.cc:15:16: error: 'endl' was not declared in this scope
   15 |   cout << c << endl;
      |                ^~~~
Language: C++

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

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>());
  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:19:12: error: 'A' was not declared in this scope
   19 |       Bob+=A[i];
      |            ^
Language: C++

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

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>());
  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:16:14: error: 'A' was not declared in this scope
   16 |       Alice+=A[i];
      |              ^
a.cc:19:12: error: 'A' was not declared in this scope
   19 |       Bob+=A[i];
      |            ^
Language: C++


#include <stdlib.h>
#include <iostream>
#include <string>
#include <ios>     // std::left, std::right
#include <vector> // std::setw(int), std::setfill(char)
using namespace std;

int main()
{
	int n;

	cin >> n;
	int sum_a = 0;
	int sum_b = 0;
	int sabun = 0;

	int hairetu[n] = { 0 };

	if (n / 2 == 0)
	{
		for (int i = 0; i < n - 1; i += 2)
		{
			sum_a += hairetu[i];
			sum_b += hairetu[i + 1];
		}
	}
	else
	{
		for (int i = 0; i < n - 1; i += 2)
		{
			hairetu[n] = { 0 };
			sum_a += hairetu[i];
			sum_b += hairetu[i + 1];
		}
	}

	cout << a - b << endl;


	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:38:17: error: 'a' was not declared in this scope
   38 |         cout << a - b << endl;
      |                 ^
a.cc:38:21: error: 'b' was not declared in this scope
   38 |         cout << a - b << endl;
      |                     ^
Language: C++


#include <stdlib.h>
#include <iostream>
#include <string>
#include <ios>     // std::left, std::right
#include <vector> // std::setw(int), std::setfill(char)
using namespace std;

int main()
{
	int n;

	cin >> n;
	int sum_a = 0;
	int sum_b = 0;
	int sabun = 0;

	int hairetu[n] = { 0 };

	if (n / 2 == 0)
	{
		for (int i = 0; i < n - 1; i += 2)
		{
			sum_a += hairetu[i];
			sum_b += hairetu[i + 1];
		}
	}
	else
	{
		for (int i = 0; i < n - 1; i += 2)
		{
			hairetu[n] = { 0 };
			sum_a += hairetu[i];
			sum_b += hairetu[i + 1];
		}
	}

	cout << a - b << endl;

	system("pause");
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:38:17: error: 'a' was not declared in this scope
   38 |         cout << a - b << endl;
      |                 ^
a.cc:38:21: error: 'b' was not declared in this scope
   38 |         cout << a - b << endl;
      |                     ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,a,n)  for (int i=(int)(a); i<=(int)(n); ++i)
#define rrep(i,a,n) for (int i=(int)(a); i>=(int)(n); --i)
#define debug(x) cerr << #x << " = " << x << "\n"
#define debugv(x) rep(i, x.size()) cerr << x[i] << (i == x.size() - 1 ? "\n" : " ")
#define all(x) x.begin(),x.end()
#define int long long
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const int INF = ((1LL << 30) + (1LL << 29));
const int MOD = 1000000007;

//=============================
int N,M,K;
string S,T;
vector<int> A;
vector<int> B;
//=============================
void input()
{
    cin>>N;
    A.resize(N);
    rep(i,0,N-1){
        cin>>A[i];
    }

}
//=============================
void func(){}
//=============================
void solve()
{
    sort(all(A));
    reverse(all(A));

    int a=b=0;
    rep(i,0,N-1){
        if (i%2){
            b += A[i];
        }
        else a += A[i];
    }

    cout<<a-b<<endl;


}
//=============================
signed main()
{
    input();
    solve();
    return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:37:11: error: 'b' was not declared in this scope
   37 |     int a=b=0;
      |           ^
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:29:10: error: 'vex' was not declared in this scope; did you mean 'vec'?
   29 |       B+=vex.at(2*i+1);
      |          ^~~
      |          vec
a.cc:32:2: error: expected '}' at end of input
   32 | }
      |  ^
a.cc:26:7: note: to match this '{'
   26 |   else{
      |       ^
a.cc:32:2: error: expected '}' at end of input
   32 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
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 i=0;
  int A=0, B=0;
  for(int j=2i; i < N; i++){
    A+=vec.at(j);
    B+=vec.at(j+1);
  }
  cout << A-B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:13: error: cannot convert 'std::complex<double>' to 'int' in initialization
   16 |   for(int j=2i; i < N; i++){
      |             ^~
      |             |
      |             std::complex<double>
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 i,j;
  i=2*j;
  int A=0, B=0;
  for(j < N; j++){
    A+=vec.at(i);
    B+=vec.at(i+1);
  }
  cout << A-B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:17: error: expected ';' before ')' token
   17 |   for(j < N; j++){
      |                 ^
      |                 ;
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 i,j;
  i=2*j;
  int A=0, B=0;
  for(j < N; j++){
    A+=vec.at(i);
    B+=vec.at(i+1)
  }
  cout << A-B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:17: error: expected ';' before ')' token
   17 |   for(j < N; j++){
      |                 ^
      |                 ;
a.cc:19:19: error: expected ';' before '}' token
   19 |     B+=vec.at(i+1)
      |                   ^
      |                   ;
   20 |   }
      |   ~
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 i,j;
  i=2j;
  int A=0, B=0;
  for(j < N; j++){
    A+=vec.at(i);
    B+=vec.at(i+1)
  }
  cout << A-B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: cannot convert '__complex__ int' to 'int' in assignment
   15 |   i=2j;
      |     ^~
      |     |
      |     __complex__ int
a.cc:17:17: error: expected ';' before ')' token
   17 |   for(j < N; j++){
      |                 ^
      |                 ;
a.cc:19:19: error: expected ';' before '}' token
   19 |     B+=vec.at(i+1)
      |                   ^
      |                   ;
   20 |   }
      |   ~
Language: C++

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

int main(){
  int N,suma=0,sumb=0,sum;
  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{
      suma+=vec.at(i);
    }else{
      sumb+=vec.at(i);
    }
       }
  sum = suma- sumb;
  cout << sum << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: expected ')' before '{' token
   13 |     if(i%2==0{
      |       ~      ^
      |              )
a.cc:18:8: error: expected primary-expression before '}' token
   18 |        }
      |        ^
Language: C++

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

int main(){
  int N,suma=0,sumb=0,sum;
  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{
      suma+=vec.at(i);
    }else{
      sumb+=vec.at(i);
  }
  sum = suma- sumb;
  cout << sum << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: expected ';' before '{' token
   13 |     if(i%2==0{
      |              ^
      |              ;
a.cc:15:6: error: expected primary-expression before 'else'
   15 |     }else{
      |      ^~~~
a.cc:15:6: error: expected ')' before 'else'
   15 |     }else{
      |      ^~~~
      |      )
a.cc:13:7: note: to match this '('
   13 |     if(i%2==0{
      |       ^
a.cc:20:2: error: expected '}' at end of input
   20 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:6:18: error: expected initializer before '.' token
    6 |   vector<int> vec.(N);
      |                  ^
a.cc:8:12: error: 'vec' was not declared in this scope
    8 |     cin >> vec.at(i);
      |            ^~~
a.cc:10:8: error: 'vec' was not declared in this scope
   10 |   sort(vec.begin(),vec.end());
      |        ^~~
Language: C++

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

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

Compiler output:
a.cc:1:10: fatal error: bits/stdc++: No such file or directory
    1 | #include <bits/stdc++>
      |          ^~~~~~~~~~~~~
compilation terminated.
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: expected ',' or ';' before 'sort'
   11 |     sort(S.begin(),S.end());
      |     ^~~~
Language: C++

#include"bits/std++.h"
using namespace std;
int main(){
  int N;
  cin>>N;
  vector<int> S(N);
  for(int i=0;i<N;i++){
    cin>>S.at(i);
  }
  int sum=0
    sort(S.begin(),S.end());
  reverse(S.begin(),S.end());
  for(int i=0;i<N;i=i+2){
    sum+=S.at(i);}
  int sumw=0;
  for(int i=1;i<N;i=i+2){
    sumw+=S.at(i);}
  cout<<sum-sumw<<endl;}

Compiler output:
a.cc:1:9: fatal error: bits/std++.h: No such file or directory
    1 | #include"bits/std++.h"
      |         ^~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  
  int N;
  cin >> N;
  vector<int> vec(N);
  vector<int> vecX;
  
  for(int i = 0 ; i < N ; i++){
    cin >> vec.at(i);
  }
  for(int j = 0 ; j < N ; j++){
    
    for(int i = 0 ; i < N ; i++){
    
      for(int k = i+1 ; k < N ; k++){
      
        if(vec.at(i) > vec.at(k)){
          if(k == N-1){
            vecX.push_back(vec.at(i));
            vec.at(i) = 0;
          }else{
            continue
          }
        }else{
          break;
        }
      }
    }
  }
  
  int sumA;
  int sumB;
  
  for(int i = 1 ; i < N+1 ; i += 2){
    sumA += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
    
  for(int i = 2 ; i < N+1 ; i += 2){
    sumB += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  cout << sumA - sumB << endl;
}
          
      
      
      
      
      
      
      
      
      
      
      
      
      

Compiler output:
a.cc: In function 'int main()':
a.cc:24:21: error: expected ';' before '}' token
   24 |             continue
      |                     ^
      |                     ;
   25 |           }
      |           ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef vector<ll> vl;
typedef vector<pair<ll,ll>> vp;
#define rep(i,n) for(ll i = 0; i < ll(n); i++)
#define all(v) v.begin() , v.end()
#define inputv(v,n) rep(i,n){\
    ll x;\
    cin>>x;\
    v.push_back(x);\
    }
const ll INF=99999999999999;
const ll MOD=1000000007;
 
int main() {
  ll n;
  cin >> n;
  vl a;
  inputv(a,n);
  sort(a.begin(),a.end());
  ll ans;
  rep(i,n){
    if(i%2 =1){
      ans += a[n-i-1];
    } else {
      ans -= a[n-i-1];
    }
  }
  cout << ans;
 return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:9: error: lvalue required as left operand of assignment
   24 |     if(i%2 =1){
      |        ~^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  
  int N ;
  cin >> N;
  vector<int> vec(N);
  vector<int> vecX(1);
  
  for(int i = 0 ; i < N ; i++){
    cin >> vec.at(i);
  }
  
  for(int j = 0 ; j < N ; j++){
    
    for(int i = 0 ; i < N ; i++){
      
      for(int k = i+1 ; k < N ; k++ ){
        if(vec.at(i) > vec.at(k)){
          continue;
        }else{
          break;
        }
      vecX.push_back(vec.at(i));
    }
  }
  int sumA;
  int sumB;
  
  for(int i = 1 ; i < N+1 ; i += 2){
    sumA += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  for(int i = 2 ; i < N+1 ; i += 2){
    sumB += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  cout << sumA - sumB << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:43:2: error: expected '}' at end of input
   43 | }
      |  ^
a.cc:3:12: note: to match this '{'
    3 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  
  int N ;
  cin >> N;
  vector<int> vec(N);
  vector<int> vecX(1);
  
  for(int i = 0 ; i < N ; i++){
    cin >> vec.at(i);
  }
  
  for(int j = 0 ; j < N ; j++){
    
    for(int i = 0 ; i < N ; i++){
      
      for(int k = i+1 ; k < N ; k++ ){
        if(vec.at(i) > vec.at(k))
      }
      vecX.push_back(vec.at(i));
    }
  }
  int sumA;
  int sumB;
  
  for(int i = 1 ; i < N+1 ; i += 2){
    sumA += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  for(int i = 2 ; i < N+1 ; i += 2){
    sumB += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  cout << sumA - sumB << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:7: error: expected primary-expression before '}' token
   20 |       }
      |       ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  
  int N ;
  cin >> N;
  vector<int> vec(N);
  vector<int> vecX(1);
  
  for(int i = 0 ; i < N ; i++){
    cin >> vec.at(i);
  }
  
  for(int j = 0 ; j < N ; j++){
    
    for(int i = 0 ; i < N ; i++){
      
      if(
        for(int k= i+1 ; k < N ; k++ ){
          vec.at(i) > vec.at(k);
        }
        )
        vecX.push_back(vec.at(i));
    }
  }
  int sumA;
  int sumB;
  
  for(int i = 1 ; i < N+1 ; i += 2){
    sumA += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  for(int i = 2 ; i < N+1 ; i += 2){
    sumB += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  cout << sumA - sumB << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:9: error: expected primary-expression before 'for'
   19 |         for(int k= i+1 ; k < N ; k++ ){
      |         ^~~
a.cc:18:10: error: expected ')' before 'for'
   18 |       if(
      |         ~^
      |          )
   19 |         for(int k= i+1 ; k < N ; k++ ){
      |         ~~~
a.cc:19:26: error: 'k' was not declared in this scope
   19 |         for(int k= i+1 ; k < N ; k++ ){
      |                          ^
a.cc:22:9: error: expected primary-expression before ')' token
   22 |         )
      |         ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  
  int N ;
  cin >> N;
  vector<int> vec(N);
  vector<int> vecX(1);
  
  for(i = 0 ; i < N ; i++){
    cin >> vec.at(i);
  }
  
  for(j = 0 ; j < N ; j++){
    
    for(i = 0 ; i < N ; i++){
      
      if(
        for(k= i+1 ; k < N ; k++ ){
          vec.at(i) > vec.at(k);
        }
        )
        vecX.push_back(vec.at(i));
    }
  }
  int sumA;
  int sumB;
  
  for(i = 1 ; i < N+1 ; i += 2){
    sumA += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  for(i = 2 ; i < N+1 ; i += 2){
    sumB += vecX.at(i);
    if(i == N-1 || i == N){
      break;
    }
  }
  cout << sumA - sumB << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:7: error: 'i' was not declared in this scope
   10 |   for(i = 0 ; i < N ; i++){
      |       ^
a.cc:14:7: error: 'j' was not declared in this scope
   14 |   for(j = 0 ; j < N ; j++){
      |       ^
a.cc:16:9: error: 'i' was not declared in this scope
   16 |     for(i = 0 ; i < N ; i++){
      |         ^
a.cc:19:9: error: expected primary-expression before 'for'
   19 |         for(k= i+1 ; k < N ; k++ ){
      |         ^~~
a.cc:18:10: error: expected ')' before 'for'
   18 |       if(
      |         ~^
      |          )
   19 |         for(k= i+1 ; k < N ; k++ ){
      |         ~~~
a.cc:19:22: error: 'k' was not declared in this scope
   19 |         for(k= i+1 ; k < N ; k++ ){
      |                      ^
a.cc:22:9: error: expected primary-expression before ')' token
   22 |         )
      |         ^
a.cc:29:7: error: 'i' was not declared in this scope
   29 |   for(i = 1 ; i < N+1 ; i += 2){
      |       ^
a.cc:35:7: error: 'i' was not declared in this scope
   35 |   for(i = 2 ; i < N+1 ; i += 2){
      |       ^
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 neko =0;
    int inu = 0;
  for(int i=0;i<N;i=i+2){
    int neko += vec.at(i);
  }
  for(int i=1;i<N;i=i+2){
    int inu += vec.at(i);
  }
  cout<<neko-inu<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:14: error: expected initializer before '+=' token
   16 |     int neko += vec.at(i);
      |              ^~
a.cc:19:13: error: expected initializer before '+=' token
   19 |     int inu += vec.at(i);
      |             ^~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   for(i=0;i<N;i++){
      |       ^
a.cc:15:7: error: 'i' was not declared in this scope
   15 |   for(i=0;i<N;i=i+2){
      |       ^
a.cc:16:14: error: expected initializer before '+=' token
   16 |     int neko += vec.at(i);
      |              ^~
a.cc:18:7: error: 'i' was not declared in this scope
   18 |   for(i=1;i<N;i=i+2){
      |       ^
a.cc:19:13: error: expected initializer before '+=' token
   19 |     int inu += vec.at(i);
      |             ^~
Language: C++

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

int main() {
  int N;
  cin >> N;
  vector<int> a;
  for(int i=0; i < N; i++){
    cin >> a.at(i+1);
  }
  sort(a.bigin(),a.end());
  reverse(a.bigin(),a.end());
  int alice=0;
  int bob=0;
  for(int i=0; i < N; i=i+2){
    alice+=a.at(i+1);
  }
  for(int i=1; i < N; i=+2){
    bob+=a.at(i+1);
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:10: error: 'class std::vector<int>' has no member named 'bigin'; did you mean 'begin'?
   11 |   sort(a.bigin(),a.end());
      |          ^~~~~
      |          begin
a.cc:12:13: error: 'class std::vector<int>' has no member named 'bigin'; did you mean 'begin'?
   12 |   reverse(a.bigin(),a.end());
      |             ^~~~~
      |             begin
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[N];
  
    sort(a.begin(), a.end(), 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:6:11: error: expected ';' before 'vector'
    6 |   cin >> N
      |           ^
      |           ;
    7 |   vector<int> a(N);
      |   ~~~~~~   
a.cc:8:37: error: 'a' was not declared in this scope
    8 |   for(int i = 0; i < N; i++) cin >> a[N];
      |                                     ^
a.cc:10:10: error: 'a' was not declared in this scope
   10 |     sort(a.begin(), a.end(), greater<int>());
      |          ^
Language: C++

#include<iosteam>
using namespace std;
int main(){
 int N,A[100],i,j,k,Ak,Bk,S=0;
   cin >> N;
  for(i = 0; i<=N ;i++){
  cin << A[i];
  }
  
  for(i = 0; i<=N ;i++){
  for(j = 0; j<=N ;j++){
    S=0;
    if(S < A[j]){
      S = A[j];
      A[j] = 0;
     }else{
      break;
    }
    k += A[j];
  }
   if(i%2 == 1){
    Bk += k;
    }else{
    Ak += k;
    }
}
 cout << Ak-Bk<< endl;
}

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

#include<iostream>
#include<algorithm>
#include<functional>
using namespace std;
int main()
{
    int N
    int a = 0;
    int b = 0;
    cin >> N;
    int A[N];
    for(int i = 0; i < N; i++){
      cin >> A[i];
    }

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

    for(int i = 0; i <= N / 2; i = i + 2){
      a += A[i];
      b += A[i + 1];
    }

    if(N % 2 == 1){
      a += A[N - 1];
    }

    cout << a - b << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: expected initializer before 'int'
    8 |     int a = 0;
      |     ^~~
a.cc:10:12: error: 'N' was not declared in this scope
   10 |     cin >> N;
      |            ^
a.cc:13:14: error: 'A' was not declared in this scope
   13 |       cin >> A[i];
      |              ^
a.cc:16:10: error: 'A' was not declared in this scope
   16 |     sort(A,A+N,greater<int>());
      |          ^
a.cc:19:7: error: 'a' was not declared in this scope
   19 |       a += A[i];
      |       ^
a.cc:24:7: error: 'a' was not declared in this scope
   24 |       a += A[N - 1];
      |       ^
a.cc:27:13: error: 'a' was not declared in this scope
   27 |     cout << a - b << endl;
      |             ^
Language: C++

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

int main(){
	int N;
	int a[110];
	cin >> N;
	for(int i = 0; i < N; i++) cin >> a[i];

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

Compiler output:
a.cc:3:1: error: 'usng' does not name a type
    3 | usng namespace std;
      | ^~~~
a.cc: In function 'int main()':
a.cc:8:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |         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:11:24: error: 'greater' was not declared in this scope; did you mean 'std::greater'?
   11 |         sort(a, a + N, greater<int>());
      |                        ^~~~~~~
      |                        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:11:32: error: expected primary-expression before 'int'
   11 |         sort(a, a + N, greater<int>());
      |                                ^~~
a.cc:11:9: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
   11 |         sort(a, a + N, greater<int>());
      |         ^~~~
      |         std::sort
In file included from /usr/include/c++/14/algorithm:86,
                 from a.cc:2:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note: 'std::sort' declared here
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
a.cc:22:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   22 |         cout << 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:22:32: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   22 |         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: C++

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

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

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

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

  cout << aScore - bScore << endl;
}

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
a.cc:15:3: error: 'reverse' was not declared in this scope
   15 |   reverse(a.begin(), a.end());
      |   ^~~~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:40: error: expected primary-expression before ')' token
    9 |     sort(a.begin(),a.end(),greater<int>);
      |                                        ^