criyle/codenet-compile-errors huggingface dataset:
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>());  // a[0:N] を大きい順にソート
    int Alice = 0;
    int Bob = 0;
    for (int i = 0; i < N; ++i) {
        if (i % 2 == 0) { // Alice のターン
            Alice += a[i];
        }
        else { // Bob のターン
            Bob += a[i];
        }
    }
    cout << Alice - Bob << endl;
}

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

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >> N ; 
  vector <int> c(N);
  for ( int i=0 ; i<N ; i++ ){
    cin >>c(i) ;
  }
  sort (c.begin() , c.end());
  int sum=0;
  for (int i=0 ; i<N ; i++){
    sum =c.(N-i-1)*( i%2==0 ? 1:-1);
  }
    cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: no match for call to '(std::vector<int>) (int&)'
    9 |     cin >>c(i) ;
      |           ~^~~
a.cc:14:12: error: expected unqualified-id before '(' token
   14 |     sum =c.(N-i-1)*( i%2==0 ? 1:-1);
      |            ^
Language: C++

#include <iostream>
#include <vector>
#incldue <algorithm>
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());
  int Alice = 0;
  int Bob = 0;
  for (int i = N-1; i >= 0; i-=2) {
    Alice += a[i];
  }
  for (int i = N-2; i >= 0; i-=2) {
    Bob += a[i];
  }
  cout << Alice-Bob << endl;
  return 0;
}


Compiler output:
a.cc:3:2: error: invalid preprocessing directive #incldue; did you mean #include?
    3 | #incldue <algorithm>
      |  ^~~~~~~
      |  include
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.begin(), a.end());
      |   ^~~~
      |   short
Language: C++

#include <iostream>
#include <vector>
#incldue <algorithm>
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());
  int Alice = 0;
  int Bob = 0;
  for (int i = N-1; i >= 0; i-=2) {
    Alice += a[i];
  }
  for (int i = N-2; i >= 0; i-=2) {
    Bob += a[i];
  }
  cout << Alice-Bob << endl;
  return 0;
}


Compiler output:
a.cc:3:2: error: invalid preprocessing directive #incldue; did you mean #include?
    3 | #incldue <algorithm>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:11:17: error: expected ')' before ';' token
   11 |   sort(a.begin(); a.end());
      |       ~         ^
      |                 )
a.cc:11:26: error: expected ';' before ')' token
   11 |   sort(a.begin(); a.end());
      |                          ^
      |                          ;
a.cc:11:24: warning: ignoring return value of 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::end() [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator]', declared with attribute 'nodiscard' [-Wunused-result]
   11 |   sort(a.begin(); a.end());
      |                   ~~~~~^~
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_vector.h:893:7: note: declared here
  893 |       end() _GLIBCXX_NOEXCEPT
      |       ^~~
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 sum=0 ;
  for (int i=N-1 ; i>=0 ; i--){
    sum = ( A.at(i) ) * ((N-i)%2==1 ? 1 : -1 )  
}
  cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:47: error: expected ';' before '}' token
   14 |     sum = ( A.at(i) ) * ((N-i)%2==1 ? 1 : -1 )
      |                                               ^
      |                                               ;
   15 | }
      | ~
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 sum=0 ;
  for (int i=N-1 ; i>=0 ; i--){
    sum = ( A.(i) ) * ((N-i)%2==1 ? 1 : -1 )  
}
  cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:15: error: expected unqualified-id before '(' token
   14 |     sum = ( A.(i) ) * ((N-i)%2==1 ? 1 : -1 )
      |               ^
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 sum=0 ;
  for (int i=N-1 ; i>=0 ; i--){
    sum = A.(i)*((N-i)%2==1 ? 1 : -1 )  
}
  cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:13: error: expected unqualified-id before '(' token
   14 |     sum = A.(i)*((N-i)%2==1 ? 1 : -1 )
      |             ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'class std::vector<int>' has no member named 'sort'
   13 |   cards.sort(cards.begin(), cards.end());
      |         ^~~~
a.cc:14:9: error: 'class std::vector<int>' has no member named 'reverse'; did you mean 'reserve'?
   14 |   cards.reverse(cards.begin(), cards.end());
      |         ^~~~~~~
      |         reserve
Language: C++

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

int main() {
  int N,a;
  cin>>N;
  vector <int> s(0);
  for (i=0;i<N;i++){
    cin>>a;
    s.push_back(a);
  }
  sort(s.begin(),s.end());
  int p,q;
  p=0;
  q=0;
  for (i =0;i<N;i++){
    if (i % 2==0){
      p+=s.at(i);
    }
    else{
      q += s.at(i);
    }
  }
  cout << p-q << 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:16:8: error: 'i' was not declared in this scope
   16 |   for (i =0;i<N;i++){
      |        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main () {
int a, b, i;
vector<int> c = ();
cin >> a;
(i=0;i<a;i++) {
cin >> c.at(i);
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:18: error: expected primary-expression before ')' token
    5 | vector<int> c = ();
      |                  ^
a.cc:7:5: error: expected ')' before ';' token
    7 | (i=0;i<a;i++) {
      | ~   ^
      |     )
a.cc:7:13: error: expected ';' before ')' token
    7 | (i=0;i<a;i++) {
      |             ^
      |             ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main () {
int a, b, i;
vector<int> c = ()
cin >> a;
(i=0;i<a;i++) {
cin >> c.at(i)
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:18: error: expected primary-expression before ')' token
    5 | vector<int> c = ()
      |                  ^
a.cc:7:5: error: expected ')' before ';' token
    7 | (i=0;i<a;i++) {
      | ~   ^
      |     )
a.cc:7:13: error: expected ';' before ')' token
    7 | (i=0;i<a;i++) {
      |             ^
      |             ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() 
{
  int i,n,answer;
  cin >> n;
  vector<int> number(n);
  for(i=0;i<n;i++)
  {
    cin >> number(i);
  }
  sort(number.begin(), number.end());
  answer = number.at(0) - number.at(n-1);
  cout << answer;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: no match for call to '(std::vector<int>) (int&)'
   11 |     cin >> number(i);
      |            ~~~~~~^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() 
{
  int i,j,n,answer;
  cin >> n;
  vector<int> number(n);
  for(i=0;i<n;i++)
  {
    cin >> number(i);
  }
  sort(number.begin(), number.end());
  answer = number(0) - number(n-1);
  cout << answer <<;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: no match for call to '(std::vector<int>) (int&)'
   11 |     cin >> number(i);
      |            ~~~~~~^~~
a.cc:14:18: error: no match for call to '(std::vector<int>) (int)'
   14 |   answer = number(0) - number(n-1);
      |            ~~~~~~^~~
a.cc:14:30: error: no match for call to '(std::vector<int>) (int)'
   14 |   answer = number(0) - number(n-1);
      |                        ~~~~~~^~~~~
a.cc:15:20: error: expected primary-expression before ';' token
   15 |   cout << answer <<;
      |                    ^
Language: Java

import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        Integer a[] = new Integer[N];
        for (int i=0; i<N; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a, Comparator.reverseOrder());

        int Alice = 0;
        int Bob   = 0;
        for (int i=0; i<N; i+=2) {
            Alice += a[i];
        }
        for (int i=1; i<N; i+=2) {
            Bob += a[i];
        }
        System.out.println(Alice - Bob);
    }

Compiler output:
Main.java:22: error: reached end of file while parsing
    }
     ^
1 error
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:29:2: error: expected '}' at end of input
   29 | }
      |  ^
a.cc:6:12: note: to match this '{'
    6 | int main() {
      |            ^
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:29:19: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   29 |     cout<alice-bob<<endl;
      |          ~~~~~~~~~^~~~~~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:26:19: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   26 |     cout<alice-bob<<endl;
      |          ~~~~~~~~~^~~~~~
a.cc:29:2: error: expected '}' at end of input
   29 | }
      |  ^
a.cc:6:12: note: to match this '{'
    6 | int main() {
      |            ^
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:28:21: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   28 |     cout<(alice-bob)<<endl;
      |          ~~~~~~~~~~~^~~~~~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:28:19: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   28 |     cout<alice-bob<<endl;
      |          ~~~~~~~~~^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a;
  int i,j;
  int sum_a = 0;
  int sum_b = 0;
  int max_vec;
  int vec_point;
  
  // 変数aで入力を受け取る
  cin >> a ;
  
  vector <int>vec(a);
  vector <int>vec_big_order(a);
  for(i=0;i<a;i++){
    cin >> vec.at(i);
    }
  for(j=0;j<a;j++){
   max_vec = 0;
   vec_point = 0;
   for(i=0;i<a;i++){
    if(max_vec < vec.at(i)){
      vec_point = i;
      max_vec = vec.at(i);
    }
    vec_big_order.at(i) = max_vec;
    vec.at(vec_point) = 0;
  }
    
  for(i=0;i<a;i=i+2){
    sum_a = vec_big_order.at(i) + sum_a;
  }
  if(a>1){
    
  	for(i=1;i<a;i=i+2){
      sum_b = sum_b + vec_big_order.at(i);
    }
  }
  }


Compiler output:
a.cc: In function 'int main()':
a.cc:41:4: error: expected '}' at end of input
   41 |   }
      |    ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a;
  int i,j;
  int sum_a = 0;
  int sum_b = 0;
  // 変数aで入力を受け取る
  cin >> a ;
  
  vector <int>vec(a);
  vector <int>vec_big_order(a);
  for(i=0;i<a;i++){
    cin >> vec.at(i);
    }
  for(j=0;j<a;j++){
   max_vec = 0;
   vec_point = 0;
   for(i=0;i<a;i++){
    if(max_vec < vec.at(i)){
      vec_point = i;
      max_vec = vec.at(i);
    }
    vec_big_order.at(i) = max_vec;
    vec.at(vec_point) = 0;
  }
    
  for(i=0;i<a;i=i+2){
    sum_a = max_vec.at(i) + sum_a;
  }
  if(a>1){
    
  	for(i=1;i<a;i=i+2){
      sum_b = sum_b + max_vec.at(i);
    }
  }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:18:4: error: 'max_vec' was not declared in this scope
   18 |    max_vec = 0;
      |    ^~~~~~~
a.cc:19:4: error: 'vec_point' was not declared in this scope
   19 |    vec_point = 0;
      |    ^~~~~~~~~
a.cc:38:4: error: expected '}' at end of input
   38 |   }
      |    ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  cin >> N;
  vector<int> vec(N);
  int i = 0;
  
  for (i = 0; i < N; i++) {
    cin  >> vec.at(i);
  }
  
  sort(vec.begin(), vec.end())
  reverse(vec.begin(), vec.end())  
  int count1 = 0;
  int count2 = 0;
  
  for (i = 0; i < N; i += 2) {
    count1 += vec.at(i);
  }
  
  for (i = 1; i < N; i += 2) {
    count2 += vec.at(i);
  }
  
  cout << count1 - count2 << endl;
  
}
    
    
    
    
    
    
    
    
    
    
    
    
    
      
    
  

Compiler output:
a.cc: In function 'int main()':
a.cc:13:31: error: expected ';' before 'reverse'
   13 |   sort(vec.begin(), vec.end())
      |                               ^
      |                               ;
   14 |   reverse(vec.begin(), vec.end())
      |   ~~~~~~~                      
a.cc:19:5: error: 'count1' was not declared in this scope; did you mean 'count2'?
   19 |     count1 += vec.at(i);
      |     ^~~~~~
      |     count2
a.cc:26:11: error: 'count1' was not declared in this scope; did you mean 'count2'?
   26 |   cout << count1 - count2 << endl;
      |           ^~~~~~
      |           count2
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  cin >> N;
  vector<int> vec(N);
  int i = 0;
  
  for (i = 0; i < N; i++) {
    cin  >> vec.at(i);
  }
  
  int card = reverse(sort(vec.begin(), vec.end()))
  int count1 = 0;
  int count2 = 0;
  
  for (i = 0; i < N; i += 2) {
    count1 += card(i);
  }
  
  for (i = 1; i < N; i += 2) {
    count2 += card(i);
  }
  
  cout << count1 - count2 << enfl;
  
}
    
    
    
    
    
    
    
    
    
    
    
    
    
      
    
  

Compiler output:
a.cc: In function 'int main()':
a.cc:13:26: error: invalid use of void expression
   13 |   int card = reverse(sort(vec.begin(), vec.end()))
      |                      ~~~~^~~~~~~~~~~~~~~~~~~~~~~~
a.cc:18:5: error: 'count1' was not declared in this scope; did you mean 'count2'?
   18 |     count1 += card(i);
      |     ^~~~~~
      |     count2
a.cc:18:19: error: 'card' cannot be used as a function
   18 |     count1 += card(i);
      |               ~~~~^~~
a.cc:22:19: error: 'card' cannot be used as a function
   22 |     count2 += card(i);
      |               ~~~~^~~
a.cc:25:11: error: 'count1' was not declared in this scope; did you mean 'count2'?
   25 |   cout << count1 - count2 << enfl;
      |           ^~~~~~
      |           count2
a.cc:25:30: error: 'enfl' was not declared in this scope; did you mean 'erfl'?
   25 |   cout << count1 - count2 << enfl;
      |                              ^~~~
      |                              erfl
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:16:9: error: lvalue required as left operand of assignment
   16 |     if(i%2=0) bob+=a[i];
      |        ~^~
Language: C++

#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
#define rep(i,n) for(int i=0;i<(n);++i)
#define repi(i,a,b) for(int i=int(a);i<int(b);++i)
#define all(x) x.begin(), x.end()
using namespace std;
int main(){
  int n;
  cin>>n;
  int a[n];
  rep(i,n) cin>>a[i];
  sort(a,a+n);
  reverse(a[0],a[n-1]);
  int Alice=0,Bob=0;
  rep(i,n){
    if(i%2==0) Alice+=a[i];
    else Bob+=a[i];
  }
  cout<<Alice-Bob<<endl;
}

Compiler output:
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h: In instantiation of 'void std::reverse(_BIter, _BIter) [with _BIter = int]':
a.cc:13:10:   required from here
   13 |   reverse(a[0],a[n-1]);
      |   ~~~~~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1089:63: error: no matching function for call to '__iterator_category(int&)'
 1089 |       std::__reverse(__first, __last, std::__iterator_category(__first));
      |                                       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:65,
                 from /usr/include/c++/14/algorithm:60:
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: note: candidate: 'template<class _Iter> constexpr typename std::iterator_traits< <template-parameter-1-1> >::iterator_category std::__iterator_category(const _Iter&)'
  239 |     __iterator_category(const _Iter&)
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator_base_types.h: In substitution of 'template<class _Iter> constexpr typename std::iterator_traits< <template-parameter-1-1> >::iterator_category std::__iterator_category(const _Iter&) [with _Iter = int]':
/usr/include/c++/14/bits/stl_algo.h:1089:63:   required from 'void std::reverse(_BIter, _BIter) [with _BIter = int]'
 1089 |       std::__reverse(__first, __last, std::__iterator_category(__first));
      |                                       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
a.cc:13:10:   required from here
   13 |   reverse(a[0],a[n-1]);
      |   ~~~~~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: error: no type named 'iterator_category' in 'struct std::iterator_traits<int>'
  239 |     __iterator_category(const _Iter&)
      |     ^~~~~~~~~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
#define rep(i,n) for(int i=0;i<(n);++i)
#define repi(i,a,b) for(int i=int(a);i<int(b);++i)
#define all(x) x.begin(), x.end()
using namespace std;
int cul(int i){
  int n;
  cin>>n;
  int a[n];
  rep(i,n) cin>>a[i];
  sort(a,a+n);
  reverse(a[0],a[n-1]);
  int Alice=0,Bob=0;
  rep(i,n){
    if(i%2==0) Alice+=a[i];
    else Bob+=a[i];
  }
  cout<<Alice-Bob<<endl;
}

Compiler output:
a.cc: In function 'int cul(int)':
a.cc:20:1: warning: no return statement in function returning non-void [-Wreturn-type]
   20 | }
      | ^
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h: In instantiation of 'void std::reverse(_BIter, _BIter) [with _BIter = int]':
a.cc:13:10:   required from here
   13 |   reverse(a[0],a[n-1]);
      |   ~~~~~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1089:63: error: no matching function for call to '__iterator_category(int&)'
 1089 |       std::__reverse(__first, __last, std::__iterator_category(__first));
      |                                       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:65,
                 from /usr/include/c++/14/algorithm:60:
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: note: candidate: 'template<class _Iter> constexpr typename std::iterator_traits< <template-parameter-1-1> >::iterator_category std::__iterator_category(const _Iter&)'
  239 |     __iterator_category(const _Iter&)
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator_base_types.h: In substitution of 'template<class _Iter> constexpr typename std::iterator_traits< <template-parameter-1-1> >::iterator_category std::__iterator_category(const _Iter&) [with _Iter = int]':
/usr/include/c++/14/bits/stl_algo.h:1089:63:   required from 'void std::reverse(_BIter, _BIter) [with _BIter = int]'
 1089 |       std::__reverse(__first, __last, std::__iterator_category(__first));
      |                                       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
a.cc:13:10:   required from here
   13 |   reverse(a[0],a[n-1]);
      |   ~~~~~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: error: no type named 'iterator_category' in 'struct std::iterator_traits<int>'
  239 |     __iterator_category(const _Iter&)
      |     ^~~~~~~~~~~~~~~~~~~
Language: C++

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

int main(){
  int N;
  int a[110];
  cin >> N;
  for(int i = 0;i < N;i++){
    cin >> a[i];
  }
  
  sort(e,e+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:13:8: error: 'e' was not declared in this scope
   13 |   sort(e,e+N,greater<int>());
      |        ^
Language: C++

#include <iostream>
using namespace std;


int main(){
  int n;
  int A[110];
  total1 = 0;
  total2 = 0;
  
  cin >> n;
  for(int i = 0;i<n;i++){
    cin >> A[i];
  }
  for(int i = 0;i<n;i++){
    if(A[i] <A[i+1]){
     int tmp = A[i];
     A[i] = A[i+1];
     A[i+1] = tmp;
    }
  }
  
  for(int i = 0;i<n;i++){
  if(i % 2 == 0){
    total1 += A[i];
  }else{
    total2 += A[i];
  }
  }
  cout << total1-total2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'total1' was not declared in this scope
    8 |   total1 = 0;
      |   ^~~~~~
a.cc:9:3: error: 'total2' was not declared in this scope
    9 |   total2 = 0;
      |   ^~~~~~
Language: C++

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

int main() {
  int n,b,c;
  b = 0;
  c = 0;
  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) {
      b = b + a.at(i);
    }
    else {
      c = c + a.at(i + 1);
    }
  }
  cout << b - c << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:22: error: 'N' was not declared in this scope
    9 |   for(int i = 0; i < N; i++) {
      |                      ^
a.cc:13:3: error: 'revers' was not declared in this scope
   13 |   revers(a.begin(),a.end());
      |   ^~~~~~
a.cc:15:10: 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,A;
  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 == 1){
      A += vec.at(i);
    }
    else{
      A -= vec.at(i);
    }
  }
  cout << A << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: expected initializer before '.' token
    7 |   vector<int>vec.(N);
      |                 ^
a.cc:8:24: error: expected ')' before ';' token
    8 |   for(int i=0; i<N; i++;){
      |      ~                 ^
      |                        )
a.cc:8:25: error: expected primary-expression before ')' token
    8 |   for(int i=0; i<N; i++;){
      |                         ^
a.cc:11:9: 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;
  cin >> N;
  vector<int>vec.(N);
  for(int i=0; i<N; i++;){
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: expected initializer before '.' token
    7 |   vector<int>vec.(N);
      |                 ^
a.cc:8:24: error: expected ')' before ';' token
    8 |   for(int i=0; i<N; i++;){
      |      ~                 ^
      |                        )
a.cc:8:25: error: expected primary-expression before ')' token
    8 |   for(int i=0; i<N; i++;){
      |                         ^
a.cc:9:2: error: expected '}' at end of input
    9 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

using namespace std;

int main() {
    int n;
    cin>>n;
    vector<int> a(n);
    int alice=0,bob=0;
    for(int i=0;i<n;i++) cin>>a.at(i);
    sort(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);
    }
    cout<<alice-bob<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'vector' was not declared in this scope
   10 |     vector<int> a(n);
      |     ^~~~~~
a.cc:4:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    3 | #include <math.h>
  +++ |+#include <vector>
    4 | 
a.cc:10:12: error: expected primary-expression before 'int'
   10 |     vector<int> a(n);
      |            ^~~
a.cc:12:31: error: 'a' was not declared in this scope
   12 |     for(int i=0;i<n;i++) cin>>a.at(i);
      |                               ^
a.cc:13:10: error: 'a' was not declared in this scope
   13 |     sort(a.begin(),a.end());
      |          ^
a.cc:13:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   13 |     sort(a.begin(),a.end());
      |     ^~~~
      |     sqrt
Language: C++

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

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

  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:14:11: error: no match for call to '(std::vector<int>) (int&)'
   14 |     cin>>a(ni);
      |          ~^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
	int N;
  	cin >> N;
  
  	vector<int> point(N);
	for (int i=0;i<N;i++){
      cin >> point.at(i);
    }
  
  	sort(point.begin(),point.end());
  	reverse(point.begin(),point.end());
  
  	int Alice=0;
  	int Bob=0;
  
  	for (int i=0;i<N;i++){
      if (i%==0){
        Alice+=point.at(i);
      }
      else;{
      	Bob+=point.at(i);
      }
      
  	cout << Alice-Bob << endl;
    } 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:14: error: expected primary-expression before '=' token
   20 |       if (i%==0){
      |              ^
Language: C++

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

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

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

N = int(input())
AN = list(map(int,input().split()))

AN.sort(reverse=True)

bob = 0
alice = 0
for n in range(N):
  if n%2 ==0:
    alice += AN[n]
  else:
    bob += AN[n]

print (alice - bob)

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

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

int main() {
  int N, A, B;
  cin >> N;
  A=0;
  B=0;
  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();
  if (N==1) {
    A=a.at(0);
  }
  else {
    if (N%2==0) {
      for (int j=0; j<N/2; j++) {
        A=A+a.at(2*j);
        B=B+a.at(2*j+1);
      }
    }
    else {
      for (int k=0; k<(N-1)/2; k++) {
        A=A+a.at(2*j);
        B=B+a.at(2*j+1);
      }
      A=A+a.at(N-1);
    }
  }
  cout << A-B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:28: error: expected ')' before ';' token
   17 |   reverse(a.begin(),a.end();
      |          ~                 ^
      |                            )
a.cc:30:20: error: 'j' was not declared in this scope
   30 |         A=A+a.at(2*j);
      |                    ^
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:13:18: error: expected ';' before ')' token
   13 |   for(int i=0;i<n){
      |                  ^
      |                  ;
Language: C++

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

int main(){
  int n,a,b;
  vevtor<int> card(n);
  cin>>n;
  for(int i=0;i<n;i++){
    cin>>card.at(i);
  }
  sort(card.begin(),card.end());
  reverse(card.begin(),card.end());
  for(int i=0;i<n){
    a+=card.at(i);
    if(i!=n-1){
      b+=card.at(i+1);
    }
  }
  cout<<a-b<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'vevtor' was not declared in this scope
    6 |   vevtor<int> card(n);
      |   ^~~~~~
a.cc:6:10: error: expected primary-expression before 'int'
    6 |   vevtor<int> card(n);
      |          ^~~
a.cc:9:10: error: 'card' was not declared in this scope
    9 |     cin>>card.at(i);
      |          ^~~~
a.cc:11:8: error: 'card' was not declared in this scope
   11 |   sort(card.begin(),card.end());
      |        ^~~~
a.cc:13:18: error: expected ';' before ')' token
   13 |   for(int i=0;i<n){
      |                  ^
      |                  ;
Language: C++

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

int main() {
  char N,j,i;
  cin >> N;
  vector<char> a(N);
  short int score=0;
  for(i=0;i<N;++i)
    cin >> a.at(i);
  for(bool is_solved=false;is_solved==true;){
    j=0;
    for(i=0;i<(N-1);++i)
      if(a.at(i)<a.at(i+1)){
        ++j;
        a.at(i) ^= a.at(i+1);
        a.at(i+1) ^= a.at(i);
        a.at(i) ^= a(i+1);
      }
    if(j==0)
      is_solved = true;
  }
  for(i=0;i<N;++i)
    score += a.at(i) * (1-(i%2==1)*2);
  cout << score << endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:21: error: no match for call to '(std::vector<char>) (int)'
   18 |         a.at(i) ^= a(i+1);
      |                    ~^~~~~
Language: C++

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>());  // a[0:N] を大きい順にソート
    int Alice = 0;
    int Bob = 0;
    for (int i = 0; i < N; ++i) {
        if (i % 2 == 0) { // Alice のターン
            Alice += a[i];
        }
        else { // Bob のターン
            Bob += a[i];
        }
    }
    cout << Alice - Bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'cin' was not declared in this scope
    6 |     cin >> N;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:9:20: error: 'greater' was not declared in this scope
    9 |     sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
      |                    ^~~~~~~
a.cc:9:28: error: expected primary-expression before 'int'
    9 |     sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
      |                            ^~~
a.cc:9:5: error: 'sort' was not declared in this scope; did you mean 'short'?
    9 |     sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
      |     ^~~~
      |     short
a.cc:20:5: error: 'cout' was not declared in this scope
   20 |     cout << Alice - Bob << endl;
      |     ^~~~
a.cc:20:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:20:28: error: 'endl' was not declared in this scope
   20 |     cout << Alice - Bob << endl;
      |                            ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: C++

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

int main() {
  int N,a,b,aa,bb,o;
  a = 0;
  b = 0;
  aa = 0;
  bb = 0;
  cin >> N;
  vector<int> c(N);
  for(int i = 0; i < N; i++) {
    cin >> c.at(i);
  }
  for(int i = 0; i < N * 2; i++) {
    for(int j = 0; j < N; j++) {
      if(c.at(j) > a) {
        a = c.at(j);
        o = j;
      }
    }
    aa = aa + a;
    c.at(o) = 0;
    for(int t = 0; t < N; t++) {
      if(c.at(t) > b) {
        b = c.at(t);
        o = j;
      }
    }
    bb = bb + b;
    c.at(o) = 0;
  }
  cout << aa - bb << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:13: error: 'j' was not declared in this scope
   27 |         o = j;
      |             ^
Language: C++

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

int main() {
  int N,a,b,aa,bb,o;
  a = 0;
  b = 0;
  aa = 0;
  bb = 0;
  cin >> N;
  vector<int> c(N);
  for(int i = 0; i < N; i++) {
    cin >> c.at(i);
  }
  for(int i = 0; i < N * 2; i++) {
    for(int j = 0; j < N; j++) {
      if(c.at(j) > a) {
        a = c.at(j);
        o = j;
      }
    }
    aa = aa + a;
    c.at(o) = 0;
    for(int t = 0; t < N; t++) {
      if(c.at(t) > b) {
        b = c.at(t);
        o = j;
      }
    }
    bb = bb + b;
    c.at(j) = 0;
  }
  cout << aa - bb << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:13: error: 'j' was not declared in this scope
   27 |         o = j;
      |             ^
a.cc:31:10: error: 'j' was not declared in this scope
   31 |     c.at(j) = 0;
      |          ^
Language: C++

#include <algorithm>
#include <bitset>
#include <tuple>
#include <cstdint>
#include <cstdio>
#include <cctype>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <cassert>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <limits>
#include <map>
#include <memory>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#define ArraySizeOf(array)     (sizeof(array) / sizeof(array[0]))
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define REP(i,n) for(int i=1;i<n;i++)
#define rev(i,n) for(int i=n-1;i>=0;i--)
#define _GLIBCXX_DEBUG
int INF = 1e9+7;
unsigned NthDayOfWeekToDay(unsigned n, unsigned dow, unsigned dow1)
{
unsigned day;
if(dow < dow1) dow += 7;
day = dow - dow1;
day += 7 * n - 6;
return day;
}
unsigned DayToWeekNumber(unsigned day)
{
  return (day - 1) / 7 + 1;
}
unsigned AnotherDayOfWeek(unsigned day, unsigned day0, unsigned dow0)
{
  return (dow0 + 35 + day - day0) % 7;
}
using namespace std;
signed main(){
  int N;
  cin>>N;
  int a[N];
  int alice=0;
  int bob=0;
  rep(i,N)cin>>a[i];
  sort(a.begin(),a.end());
  rep(i,N){
    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:65:10: error: request for member 'begin' in 'a', which is of non-class type 'int [N]'
   65 |   sort(a.begin(),a.end());
      |          ^~~~~
a.cc:65:20: error: request for member 'end' in 'a', which is of non-class type 'int [N]'
   65 |   sort(a.begin(),a.end());
      |                    ^~~
Language: C++

#include <algorithm>
#include <bitset>
#include <tuple>
#include <cstdint>
#include <cstdio>
#include <cctype>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <cassert>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <limits>
#include <map>
#include <memory>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#define ArraySizeOf(array)     (sizeof(array) / sizeof(array[0]))
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define REP(i,n) for(int i=1;i<n;i++)
#define int long long
#define rev(i,n) for(int i=n-1;i>=0;i--)
#define _GLIBCXX_DEBUG
int INF = 1e9+7;
unsigned NthDayOfWeekToDay(unsigned n, unsigned dow, unsigned dow1)
{
unsigned day;
if(dow < dow1) dow += 7;
day = dow - dow1;
day += 7 * n - 6;
return day;
}
unsigned DayToWeekNumber(unsigned day)
{
  return (day - 1) / 7 + 1;
}
unsigned AnotherDayOfWeek(unsigned day, unsigned day0, unsigned dow0)
{
  return (dow0 + 35 + day - day0) % 7;
}
using namespace std;
signed main(){
  int N;
  cin>>N;
  int a[N];
  int alice=0;
  int bob=0;
  rep(i,N)cin>>a[i];
  sort(a.begin(),a.end());
  rep(i,N){
    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:66:10: error: request for member 'begin' in 'a', which is of non-class type 'long long int [N]'
   66 |   sort(a.begin(),a.end());
      |          ^~~~~
a.cc:66:20: error: request for member 'end' in 'a', which is of non-class type 'long long int [N]'
   66 |   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.bgin(), a.end());
  
  int ans=0;
  for(int i=0; i<N; i++){
    if(i%2==0){
      ans += a.at(i);
    }
    else{
      ans-=a.at(i);
    }
  }
  
  cout << ans << endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:10: error: 'class std::vector<int>' has no member named 'bgin'; did you mean 'begin'?
   13 |   sort(a.bgin(), a.end());
      |          ^~~~
      |          begin
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'vector' was not declared in this scope
    6 |     vector<int> a(N,0);
      |     ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include<iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:6:12: error: expected primary-expression before 'int'
    6 |     vector<int> a(N,0);
      |            ^~~
a.cc:9:16: error: 'a' was not declared in this scope
    9 |         cin >> a.at(i);
      |                ^
a.cc:11:10: error: 'a' was not declared in this scope
   11 |     sort(a.begin(),a.end());
      |          ^
a.cc:11:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |     sort(a.begin(),a.end());
      |     ^~~~
      |     short
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'vector' was not declared in this scope
    6 |     vector<int> a(N,0);
      |     ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include<iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:6:12: error: expected primary-expression before 'int'
    6 |     vector<int> a(N,0);
      |            ^~~
a.cc:9:16: error: 'a' was not declared in this scope
    9 |         cin >> a.at(i);
      |                ^
a.cc:11:10: error: 'a' was not declared in this scope
   11 |     sort(a.begin(),a.end());
      |          ^
a.cc:11:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |     sort(a.begin(),a.end());
      |     ^~~~
      |     short
a.cc:13:15: error: expected primary-expression before '==' token
   13 |         if(i% == 0){
      |               ^~
Language: C++

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

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


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

#include<stdio.h>
int main()
{
 int a[100]={0};
  int N,i,j,tmp,Alice=0,Bob=0,point;
  scanf("%d",&N);
   for(i=0;i<N;i++)
  {
   scanf("%d",&a[i]);
  }
   for(j=0;j<N;j++)
  {
  for(i=0;i<N-1;i++)
  {
    if(a[i]<=a[i+1])
    {
      tmp=a[i];
      a[i]=a[i+1];
      a[i+1]=tmp;
    }
  }
  } 
     for(i=0;i<=N;i++)
     {if(i%2==0){Alice=Alice+a[i]; }
      else{Bob=Bob+a[i];}
     }  
     point=Alice-Bob;
  printf("%d",point);
  return 0;

Compiler output:
main.c: In function 'main':
main.c:29:3: error: expected declaration or statement at end of input
   29 |   return 0;
      |   ^~~~~~
Language: C

#include<stdio.h>
int main()
{
 int a[100]={0};
  int N,i,Alice,Bob,point;
  scanf("%d",&N);
   for(i=0;i<5;i++)
  {
   scanf("%d",&a[i]);
  }
   for(j=0;j<N-1;j++)
  {
  for(i=0;i<N-1;i++)
  {
    if(a[i]<=a[i+1])
    {
      tmp=a[i];
      a[i]=a[i+1];
      a[i+1]=tmp;
    }
  }
     for(i=0;i<=N;i=i+2)
     {
      Alice+=a[i]; 
     }
     for(i=1;i<=N;i=i+2)
     {
       Bob+=a[i];
     }
     point=Alice-Bob;
     printf("%d ",point);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:11:8: error: 'j' undeclared (first use in this function)
   11 |    for(j=0;j<N-1;j++)
      |        ^
main.c:11:8: note: each undeclared identifier is reported only once for each function it appears in
main.c:17:7: error: 'tmp' undeclared (first use in this function)
   17 |       tmp=a[i];
      |       ^~~
main.c:33:1: error: expected declaration or statement at end of input
   33 | }
      | ^
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>>vec[i];
  }
  sort(A.begin(),A.end());
  int sum=0;
  for(int i=0;i<n;i++){
    int kk=A[i];
    if(i%2=0){sum+=kk}
    else{sum-=kk}
  }
  cout<<sum<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: 'vec' was not declared in this scope
    9 |     cin>>vec[i];
      |          ^~~
a.cc:15:9: error: lvalue required as left operand of assignment
   15 |     if(i%2=0){sum+=kk}
      |        ~^~
a.cc:15:22: error: expected ';' before '}' token
   15 |     if(i%2=0){sum+=kk}
      |                      ^
      |                      ;
a.cc:16:17: error: expected ';' before '}' token
   16 |     else{sum-=kk}
      |                 ^
      |                 ;
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);
  }
  int m,n;
  for(int i=0;i<N;i++){
   if(i%2==0){
     for(int j=0;j<N-1;i++){
       if(j=0){
         m=vec.at(j);
       }else if(vec.at(j)<vec.at(j+1)){
         m=vec.at(j+1);
       }
     }
   }else{
     for(int j=0;j<N-1;i++){
       if(j=0){
         n=vec.at(j);
       }else if(vec.at(j)<vec.at(j+1)){
         n=vec.at(j+1);
   }
  }
  cout << m-n <<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:2: error: expected '}' at end of input
   30 | }
      |  ^
a.cc:12:23: note: to match this '{'
   12 |   for(int i=0;i<N;i++){
      |                       ^
a.cc:30:2: error: expected '}' at end of input
   30 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^