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

#include<bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
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;
    rep(i,n){
      cin >> a[i];
    }
    sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
    int A = 0;
    int B = 0;
    rep(i,n){
        if (i % 2 == 0) A += a[i];
        else B += a[i];
    }
    cout << A - B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:11: error: 'n' was not declared in this scope
    9 |     rep(i,n){
      |           ^
a.cc:2:39: note: in definition of macro 'rep'
    2 | #define rep(i, n) for (int i = 0; i < n; ++i)
      |                                       ^
a.cc:15:11: error: 'n' was not declared in this scope
   15 |     rep(i,n){
      |           ^
a.cc:2:39: note: in definition of macro 'rep'
    2 | #define rep(i, n) for (int i = 0; i < n; ++i)
      |                                       ^
Language: C++

#include<bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
using namespace std;

int main() {
    int N;
    int a[110];
    cin >> N;
    rep(i,n){
      cin >> a[i];
    }
    sort(a, a + N, greater<int>());  // a[0:N] を大きい順にソート
    int A = 0;
    int B = 0;
    rep(i,n){
        if (i % 2 == 0) A += a[i];
        else B += a[i];
        }
    }
    cout << A - B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:11: error: 'n' was not declared in this scope
    9 |     rep(i,n){
      |           ^
a.cc:2:39: note: in definition of macro 'rep'
    2 | #define rep(i, n) for (int i = 0; i < n; ++i)
      |                                       ^
a.cc:15:11: error: 'n' was not declared in this scope
   15 |     rep(i,n){
      |           ^
a.cc:2:39: note: in definition of macro 'rep'
    2 | #define rep(i, n) for (int i = 0; i < n; ++i)
      |                                       ^
a.cc: At global scope:
a.cc:20:5: error: 'cout' does not name a type
   20 |     cout << A - B << endl;
      |     ^~~~
a.cc:21:1: error: expected declaration before '}' token
   21 | }
      | ^
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 A = 0;
  int B = 0;
  
  for(int j = 0; j < N; j += 2) {
    A += vec.at(j);
  }
  
  for(int k = 1; k < N; k += 2) {
    B += vec,at(k);
  }
  
  cout << A - B << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:7: error: no match for 'operator+=' (operand types are 'int' and 'std::vector<int>')
   21 |     B += vec,at(k);
      |     ~~^~~~~~
a.cc:21:14: error: 'at' was not declared in this scope
   21 |     B += vec,at(k);
      |              ^~
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 A = 0;
  int B = 0;
  
  for(int j = 0, j < N, j += 2) {
    A += vec.at(j);
  }
  
  for(int k = 1, k < N, k += 2) {
    B += vec,at(k);
  }
  
  cout << A - B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: missing template arguments before '(' token
    8 |   vector(int)vec(N);
      |         ^
a.cc:8:10: error: expected primary-expression before 'int'
    8 |   vector(int)vec(N);
      |          ^~~
a.cc:9:19: error: expected ';' before '<' token
    9 |   for(int i = 0, i < N, i++) {
      |                   ^~
      |                   ;
a.cc:9:20: error: expected primary-expression before '<' token
    9 |   for(int i = 0, i < N, i++) {
      |                    ^
a.cc:9:28: error: expected ';' before ')' token
    9 |   for(int i = 0, i < N, i++) {
      |                            ^
      |                            ;
a.cc:10:12: error: 'vec' was not declared in this scope
   10 |     cin >> vec.at(i);
      |            ^~~
a.cc:16:19: error: expected ';' before '<' token
   16 |   for(int j = 0, j < N, j += 2) {
      |                   ^~
      |                   ;
a.cc:16:20: error: expected primary-expression before '<' token
   16 |   for(int j = 0, j < N, j += 2) {
      |                    ^
a.cc:16:31: error: expected ';' before ')' token
   16 |   for(int j = 0, j < N, j += 2) {
      |                               ^
      |                               ;
a.cc:17:10: error: 'vec' was not declared in this scope
   17 |     A += vec.at(j);
      |          ^~~
a.cc:20:19: error: expected ';' before '<' token
   20 |   for(int k = 1, k < N, k += 2) {
      |                   ^~
      |                   ;
a.cc:20:20: error: expected primary-expression before '<' token
   20 |   for(int k = 1, k < N, k += 2) {
      |                    ^
a.cc:20:31: error: expected ';' before ')' token
   20 |   for(int k = 1, k < N, k += 2) {
      |                               ^
      |                               ;
a.cc:21:10: error: 'vec' was not declared in this scope
   21 |     B += vec,at(k);
      |          ^~~
a.cc:21:14: error: 'at' was not declared in this scope
   21 |     B += vec,at(k);
      |              ^~
Language: C++

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

int main(){
  int n;
  cin >> n;
  int vector<int> card(100);
  int alice=0,bob=0;

  for(int i=0;i<n;i++){
    cin >> card[i];
  }
  sort(card.begin(),card.end());
  reverse(card.begin(),card.end());

  for (int i=0;i<card.size();i++){
    if (i%2==0) alice+=card[i];
    else bob+=card[i];
  }
  cout << alice - bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:19: error: invalid declarator before 'card'
    7 |   int vector<int> card(100);
      |                   ^~~~
a.cc:11:12: error: 'card' was not declared in this scope
   11 |     cin >> card[i];
      |            ^~~~
a.cc:13:8: error: 'card' was not declared in this scope
   13 |   sort(card.begin(),card.end());
      |        ^~~~
Language: C++

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

int main() {
  int N;
  cin >> N;
  vector<int> card(N);
  for (int i = 0; i < N; i++) {
    cin >> card.at(i);
  }
  sort(card.begin(), card.end());
  int P=0;
  int Q=0;
  if(N%2==1){
  for(int i=0; i<N; i++){
   if(i%2==0){
     P+=card.at(i);
   }
    else{
      Q+=card.at(i);
    }
  }
  }
  else{
    for(int i=0; i<N; i++){
   if(i%2==1){
     P+=card.at(i);
   }
    else{
      Q+=card.at(i);
    }
  }
  
  cout<<P-Q<< endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:35:2: error: expected '}' at end of input
   35 | }
      |  ^
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> card(N);
  for (int i = 0; i < N; i++) {
    cin >> card.at(i);
  }
  sort(card.begin(), card.end());
  int P=0;
  int Q=0;
  for(int i; i<N; i++){
   if(i%2==0){
     P+=card.at(i);
   }
    else{
      Q+=card.at(i);
    }
  }
  }
  cout<<P-Q<< endl;
}


Compiler output:
a.cc:23:3: error: 'cout' does not name a type
   23 |   cout<<P-Q<< endl;
      |   ^~~~
a.cc:24:1: error: expected declaration before '}' token
   24 | }
      | ^
Language: C++

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

int main() {
  int N;
  cin >> N;
  vector<int> card(N);
  for (int i = 0; i < N; i++) {
    cin >> card.at(i);
  sort(card.begin(), card.end());
  int P=0;
  for(int i; i<N; i+=2){
   P+= card.at(i)-card.at(i++);
  }
  cout<<P<< endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:2: error: expected '}' at end of input
   16 | }
      |  ^
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> card(N);
  for (int i = 0; i < N; i++) {
    cin >> card.at(i);
  sort(vec.begin(), vec.end());
  int P=0;
  for(int i; i<N; i+=2){
   P+= card.at(i)-card.at(i++);
  }
  cout<<P<< endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:8: error: 'vec' was not declared in this scope
   10 |   sort(vec.begin(), vec.end());
      |        ^~~
a.cc:16:2: error: expected '}' at end of input
   16 | }
      |  ^
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> card(N);
  for (int i = 0; i < N; i++) {
    cin >> vec.at(i);
  sort(vec.begin(), vec.end());
  int P=0;
  for(int i; i<N; i+=2){
   P+= card.at(i)-card.at(i++)
  }
  cout<<P<< endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: 'vec' was not declared in this scope
    9 |     cin >> vec.at(i);
      |            ^~~
a.cc:13:31: error: expected ';' before '}' token
   13 |    P+= card.at(i)-card.at(i++)
      |                               ^
      |                               ;
   14 |   }
      |   ~                            
a.cc:16:2: error: expected '}' at end of input
   16 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#coding:utf-8
n = int(input())
a = list(map(int, input().split()))

card = sorted(a, reverse=True)

alice = sum(card[0::2])
bob = sum(card[1::2])
print(alice - bob)

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #coding
    1 | #coding:utf-8
      |  ^~~~~~
a.cc:2:1: error: 'n' does not name a type
    2 | n = int(input())
      | ^
Language: C++

#include <iostream>
using namespace std;
int main(){
  int N;
  int a[110];
  cin>>N;
  for ( int i=0; i<N; ++i) cin>>a[i];
 sort(a, a + N, greater<int>()); 
    int alice=0;
  int bob=0;
  for (int i=0; i<N; i+=2) alice+=i;
  for (int i=1; i<N; i+=2) bob+=i;
  int ttt=alice-bob;
  cout<<ttt<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:8:2: error: 'sort' was not declared in this scope; did you mean 'short'?
    8 |  sort(a, a + N, greater<int>());
      |  ^~~~
      |  short
Language: C++

#include <iostream>
using namespace std;
int main(){
  int N;
  int a[110];
  cin>>N;
  for ( int i=0; i<N; ++i) cin>>a[i];
  sort(a,a+N, greater<int>());
    int alice=0;
  int bob=0;
  for (int i=0; i<N; i+=2) alice+=i;
  for (int i=1; i<N; i+=2) bob+=i;
  int ttt=alice-bob;
  cout<<ttt<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'sort' was not declared in this scope; did you mean 'short'?
    8 |   sort(a,a+N, greater<int>());
      |   ^~~~
      |   short
Language: C++

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

int main() {
  int N;
  cin >> N;
  
  vector<int> vec(N); int x;
  for (int i = 0; i < N, i++) {
    cin >> x;
    vec.at(i) = x;
  }
  
  sort(vec.begin(), vec.end());
  int sum_all = 0, sum_first = 0;
  
  for (int i = 0; i < N; i++)
    sum_all += vec.at(i);
  
  for (int i = 0; i < N; i += 2)
    sum_first += vec.at(i);
  
  int print;
  print = 2 * sum_first - sum_all;
  cout << print << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:9:29: error: expected ';' before ')' token
    9 |   for (int i = 0; i < N, i++) {
      |                             ^
      |                             ;
a.cc:25:25: error: expected '}' at end of input
   25 |   cout << print << endl;
      |                         ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
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];

    reverse(a.begin(), a.end());  // 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:11:15: error: request for member 'begin' in 'a', which is of non-class type 'int [110]'
   11 |     reverse(a.begin(), a.end());  // a[0:N] を大きい順にソート
      |               ^~~~~
a.cc:11:26: error: request for member 'end' in 'a', which is of non-class type 'int [110]'
   11 |     reverse(a.begin(), a.end());  // a[0:N] を大きい順にソート
      |                          ^~~
Language: C++

#include <iostream>
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque
#include <unordered_map> // unordered_map
#include <unordered_set> // unordered_set
#include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
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 sa;
    sa = 0;
    for (int i = 0; i < N; i++) {
        sa += pow(-1,i)*vec.at(i);
    }
    cout << sa << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:33:15: error: 'pow' was not declared in this scope
   33 |         sa += pow(-1,i)*vec.at(i);
      |               ^~~
Language: C++

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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repi(i, s, n) for (int i = (s); i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << ": " << x << '\n'

typedef long long int ll;
typedef pair<int, int> P;

const long long INF = 3e18 + 12;
const int inf = 1e9;

int main() {
  int n;
  cin >> n;
  vector<int> v(n);
  int sum = 0;
  rep(i, n) {
    cin >> v[i];
    sum += v[i];
  }

  sort(all(v), greater<int>());

  int alice = 0;
  for (int i = 0; i < n; i += 2) {
    alice += v[i];
  }
  cout << alice - (sum - alice) << endl;

  return 0;
}⏎                    

Compiler output:
a.cc:34:2: error: extended character ⏎ is not valid in an identifier
   34 | }⏎
      |  ^
a.cc:34:2: error: '\U000023ce' does not name a type
   34 | }⏎
      |  ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define _GLIBCXX_DEBUG

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 scoreAlice = 0, scoreBob = 0;
	bool flag = true;
	for (int i = n - 1; i >= 0; i--) {
		if (flag == true) {
			scoreAlice += a[i];
			flag = false;
		}
		else {
			scoreBob += a[i];
			flag = true;
		}
	}
	cout << scoreAlice - scoreBob << endl;
	return 0;
}
#include <iostream>
#include <string>
#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[i];
	}
	sort(a.begin(), a.end());
	int scoreAlice = 0, scoreBob = 0;
	bool flag = true;
	for (int i = n - 1; i >= 0; i--) {
		if (flag == true) {
			scoreAlice += a[i];
			flag = false;
		}
		else {
			scoreBob += a[i];
			flag = true;
		}
	}
	cout << scoreAlice - scoreBob << endl;
	return 0;
}


Compiler output:
a.cc:36:5: error: redefinition of 'int main()'
   36 | int main(){
      |     ^~~~
a.cc:6:5: note: 'int main()' previously defined here
    6 | int main(){
      |     ^~~~
Language: C++

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



Compiler output:
a.cc: In function 'int main()':
a.cc:11:30: error: expected ';' before 'int'
   11 |   reverse(A.begin(), A.end())
      |                              ^
      |                              ;
   12 |     int a=0;
      |     ~~~                       
a.cc:16:5: error: 'a' was not declared in this scope
   16 |     a +=A[i];
      |     ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main() {
    int n;

    cin >> n;

    vector<int> a(n);

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

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

    int r = 0;

    for (int j = 0; j < n; ++j) {
        if (j % 2 == 0)
            r += a.at(j);
        else
            r -= a.at(j);
    }

    cout << r;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   17 |     sort(a.begin(), a.end());
      |     ^~~~
      |     short
a.cc:18:5: error: 'reverse' was not declared in this scope
   18 |     reverse(a.begin(), a.end());
      |     ^~~~~~~
Language: C++

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

int main()
{
  int n, a = 0; b = 0;
  cin >> n;
  vector<int> v(n);
  for (int i=0; i<n; i++)
    cin >> v.at(i);
  
  for (int i=0; i<n-1; i++) {
    for (int j=i+1; j<n; j++) {
      if (v.at(i) < v.at(j)) {
        int tmp = v.at(i);
        v.at(i) = v.at(j);
        v.at(j) = tmp;
      }
    }
  }
  for (int i=0; i<n; i+=2)
    a += v.at(i);
  for (int i=1; i<n; i+=2)
    b += v.at(i);
  
  cout << a - b << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: 'b' was not declared in this scope
    6 |   int n, a = 0; b = 0;
      |                 ^
Language: C++

#include <iostream>
using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'vector' was not declared in this scope
    6 |   vector<int> v(n);
      |   ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:6:10: error: expected primary-expression before 'int'
    6 |   vector<int> v(n);
      |          ^~~
a.cc:7:7: error: 'i' was not declared in this scope
    7 |   rep(i,n){
      |       ^
a.cc:7:3: error: 'rep' was not declared in this scope
    7 |   rep(i,n){
      |   ^~~
a.cc:10:8: error: 'v' was not declared in this scope
   10 |   sort(v.begin(),v.end());
      |        ^
a.cc:10:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   10 |   sort(v.begin(),v.end());
      |   ^~~~
      |   short
Language: C++

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

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

#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N,ans = 0;
  vector<int>str(N);

  for ( int i = 0; i < N; ++i)
    cin >> str.at(i);

  sort(str.begin(),str.end());
  reverse(str.begin(),str.end());
  for ( int j = 0; j < N; ++j){
    if (j%2 == 0)
      ans += str.at(j);
    else
      ans -= str.at(j);
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:12: error: 'ans' was not declared in this scope; did you mean 'abs'?
    5 |   cin >> N,ans = 0;
      |            ^~~
      |            abs
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:21:2: error: expected '}' at end of input
   21 | }
      |  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C

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

#define MAX(a,b) (a > b ? a : b)
#define MIN(a,b) (a < b ? a : b)
const int inf = 1000000000; // 10^9

int com_dsc_int(const void *n1,const void *n2){
   if(*(int*)n1 < *(int*)n2)return 1;
   else if(*(int*)n1 > *(int*)n2)return -1;
   else return 0;
}

int main(){
   int n;scanf("%d",&n);
   int a[100];
   for(int i = 0;i < n;i++)scanf("%d",a[i]);
   qsort(a,n,sizeof(int),com_dsc_int);
   int ali+=0,bob+=0;
   for(int i = 0;i < n;i+=2){
      ali+=a[i];
      bob+=a[i+1];
   }
   printf("%d",ali-bob);
}

Compiler output:
main.c: In function 'main':
main.c:20:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before '+=' token
   20 |    int ali+=0,bob+=0;
      |           ^~
main.c:20:11: error: expected expression before '+=' token
main.c:20:15: error: 'bob' undeclared (first use in this function)
   20 |    int ali+=0,bob+=0;
      |               ^~~
main.c:20:15: note: each undeclared identifier is reported only once for each function it appears in
main.c:22:7: error: 'ali' undeclared (first use in this function)
   22 |       ali+=a[i];
      |       ^~~
Language: C++

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

int main(){
    int n, alice=0, bob=0, odd=0;
    cin >> n;
    vector<int> a(n);
    for (int i=0; i<n; i++) {
        cin >> a.at(i);
    }
    sort(a.begin(), v.end());
    for (int i=n-1; i>-1; i--) {
        if (odd==0) {
            alice += a.at(i);
            odd = 1;
        }
        else {
            bob += a.at(i);
            odd = 0;
        }
    }
    cout << alice - bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:21: error: 'v' was not declared in this scope
   12 |     sort(a.begin(), v.end());
      |                     ^
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:10:26: error: expected ';' before 'int'
   10 |   sort(A.begin(),A.end())
      |                          ^
      |                          ;
   11 |   int alice_score = 0;
      |   ~~~                     
a.cc:15:7: error: 'alice_score' was not declared in this scope
   15 |       alice_score += A.at(i);
      |       ^~~~~~~~~~~
a.cc:19:11: error: 'alice_score' was not declared in this scope
   19 |   cout << alice_score - bob_score << endl;
      |           ^~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N, A = 0, B = 0;
  cin >> N;
  
  vector<int> a(N);
  for(int i = 0; i < N; i++){
    cin >> a.at(i);
  }
  
  for(int i = 0; i < (N + 1) / 2; i++){
    int max1, max2 = 0;
    
    for(int j = 0; j < N - 1; j++){
      max1 = max(a.at(j), a.at(j + 1))
    }
    
    for(int j = 0; j < N; j++){
      if(max1 == a.at(j)){
        a.at(j) = 0;
        break;
      }
    }
    
    for(int j = 0; j < N; j++){
      if(max2 < a.at(j)){
        max2 = a.at(j);
      }
    }
    
    for(int j = 0; j < N; j++){
      if(max2 == a.at(j)){
        a.at(j) = 0;
        break;
      }
    }
    
    A += max1;
    B += max2;
  }
  
  cout << A - B << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:39: error: expected ';' before '}' token
   17 |       max1 = max(a.at(j), a.at(j + 1))
      |                                       ^
      |                                       ;
   18 |     }
      |     ~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: expected ';' before '}' token
    9 |     cin >> a.at(i)
      |                   ^
      |                   ;
   10 |   }
      |   ~                
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;
  cin >> N;
  vector<int> a(N);
  for(int i=0;i<N;i++)
    cin >> a(i);
  
  sort(a.begin(),a.end());
  reverse(a.begin(),a.end());
  
  int answer = 0;
  
  for(int i=0;i<N;i++){
    if(i%2==0)
      answer += a.at(i);
    else
      answer -= a.at(i);
  }
  cout << answer << endl;

}

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

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

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




Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: 'class std::vector<int>' has no member named 'bigin'; did you mean 'begin'?
    9 |   sort(vec.bigin(),vec.end());
      |            ^~~~~
      |            begin
a.cc:10:15: error: 'class std::vector<int>' has no member named 'bigin'; did you mean 'begin'?
   10 |   reverse(vec.bigin(),vec.end());
      |               ^~~~~
      |               begin
Language: C++

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

int N;
vector<int> a(110);

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

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

  int Alice = 0;
  int Bob = 0;

  for (int i = 0; i < N; i++)
  {
    if (i % 2 == 1)
    {
      Alice += a.at(i);
    }
    else
    {
      Bob += a.at(i);
    }
  }

  cout << Alice - Bob << endl;
}

Compiler output:
a.cc:6:1: error: 'vector' does not name a type
    6 | vector<int> a(110);
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:12:12: error: 'a' was not declared in this scope
   12 |     cin >> a.at(i);
      |            ^
a.cc:15:8: error: 'a' was not declared in this scope
   15 |   sort(a.begin(), a.end(), greater<int>());
      |        ^
Language: C++

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

int main() {
  int N, 

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: expected unqualified-id at end of input
    5 |   int N,
      |         ^
a.cc:5:9: error: expected '}' at end of input
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

int main()
{

	int N, p = 0;
	cin >> N;
	vector<int> a(N);

	for (int i = 0; i < N; i++)
		cin >> a.at(i);
	sort(a.begin(), a.end());

	for (int i = 0; i < N; i++)
	{
		if (i % 2 ==)
			p += a.at(i);
		else
			p -= a.at(i);
	}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:29: error: expected primary-expression before ')' token
   17 |                 if (i % 2 ==)
      |                             ^
Language: C++

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

int main()
{

	int N, p = 0;
	cin >> N;
	vector<int> a(N);

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

	for (int i = 0; i < N; i++)
	{
		if (i % 2 ==)
			p += a.at(i);
		else
			p -= a.at(i);
	}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:29: error: expected primary-expression before ')' token
   15 |                 if (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 x = 0;
  for (int i = 0; i < N; i++) {
    if (N % 2 == 1) {
      x += vec.at(i);
    }
    else {
      x -= vec.at(i);
    }
  }
  cout << x << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:20: error: expected ';' before '<' token
    8 |   for (int i = 0, i < N, i++) {
      |                    ^~
      |                    ;
a.cc:8:21: error: expected primary-expression before '<' token
    8 |   for (int i = 0, i < N, i++) {
      |                     ^
a.cc:8:29: error: expected ';' before ')' token
    8 |   for (int i = 0, i < N, i++) {
      |                             ^
      |                             ;
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:14:13: error: expected primary-expression before ';' token
   14 |   for(int j=;1j<N+1;j++){
      |             ^
a.cc:14:16: error: invalid operands of types '__complex__ int' and 'int' to binary 'operator<'
   14 |   for(int j=;1j<N+1;j++){
      |              ~~^~~~
      |              |   |
      |              |   int
      |              __complex__ int
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:16:32: error: expected ';' before '}' token
   16 |      if(j%2==1){sum -=vec.at(j)}
      |                                ^
      |                                ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
 int N;
  cin>>N;
  vector<int>vec;
  for(int i=0;i<N;i++){
     cin>>vec.at(i);
  }
  sort(vec.begin(),vec.end());
  recerce(vec.begin(),vec.end());
  
  int Alice=0,Bob=0;
  for(int j=0;j<N;j++){
     if(j%2==0){
       Alice +=vec.at(j)
         else{
           Bob +=vec.at(j)
         }
     }
  }
  cout<<Alice-Bob;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'recerce' was not declared in this scope
   12 |   recerce(vec.begin(),vec.end());
      |   ^~~~~~~
a.cc:17:25: error: expected ';' before 'else'
   17 |        Alice +=vec.at(j)
      |                         ^
      |                         ;
   18 |          else{
      |          ~~~~
Language: C++

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

int main() {
	int N;
  int A[N];
  cin >> N;
  for(int i=0; i <N; i++) cin >> A[i];
  sort(A, A+N, greater<int>());
  int sum1 = 0;
  int sum2 = 0;
  for(int i=0; i<N; i++){
    if(i % 2 == 0) {
    	sum1 += A{i];
           
    } else {
     	sum2 += A[i];   
     }
  }

  cout << sum1 - sum2 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:14: error: invalid conversion from 'int*' to 'int' [-fpermissive]
   15 |         sum1 += A{i];
      |         ~~~~~^~~~
      |              |
      |              int*
a.cc:15:18: error: expected ';' before '{' token
   15 |         sum1 += A{i];
      |                  ^
      |                  ;
a.cc:17:7: error: expected '}' before 'else'
   17 |     } else {
      |       ^~~~
a.cc:14:20: note: to match this '{'
   14 |     if(i % 2 == 0) {
      |                    ^
Language: C++

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

int main() {
	int N;
  int A[N];
  cin >> N;
  for(int i=0; i <N; i++) cin >> A[i];
  sort(A[N].begin(), A[N].end());
  int sum1 = 0;
  int sum2 = 0;
  for(int i=0; i<N; i++){
    if(i % 2 == 1) sum1 += A[i];
    if(i % 2 == 0) sum2 += A[i];
  }

  cout << sum1 - sum2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: request for member 'begin' in 'A[N]', which is of non-class type 'int'
   10 |   sort(A[N].begin(), A[N].end());
      |             ^~~~~
a.cc:10:27: error: request for member 'end' in 'A[N]', which is of non-class type 'int'
   10 |   sort(A[N].begin(), A[N].end());
      |                           ^~~
Language: C++

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

int main() {
	int N;
  int A[N];
  cin >> N;
  for(i=0; i <N; i++) cin >> A[i];
  sort(A[N].begin(), A[N].end());
  int sum1 = 0;
  int sum2 = 0;
  for(i=0; i<N; i++){
    if(i % 2 == 1) sum1 += A[i];
    if(i % 2 == 0) sum2 += A[i];
  }

  cout << sum1 - sum2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: 'i' was not declared in this scope
    9 |   for(i=0; i <N; i++) cin >> A[i];
      |       ^
a.cc:10:13: error: request for member 'begin' in 'A[N]', which is of non-class type 'int'
   10 |   sort(A[N].begin(), A[N].end());
      |             ^~~~~
a.cc:10:27: error: request for member 'end' in 'A[N]', which is of non-class type 'int'
   10 |   sort(A[N].begin(), A[N].end());
      |                           ^~~
a.cc:13:7: error: 'i' was not declared in this scope
   13 |   for(i=0; i<N; i++){
      |       ^
Language: C++

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

int main() {
	int N;
  int A[N];
  cin >> N;
  for(i=0, i <N; i++) cin >> A[i];
  sort(A[N].begin(), A[N].end());
  int sum1 = 0;
  int sum2 = 0;
  for(i=0, i<N; i++){
    if(i % 2 == 1) sum1 += A[i];
    if(i% 2 == 0) sum2 += A[i];
  }

  cout << sum1 - sum2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: 'i' was not declared in this scope
    9 |   for(i=0, i <N; i++) cin >> A[i];
      |       ^
a.cc:9:21: error: expected ';' before ')' token
    9 |   for(i=0, i <N; i++) cin >> A[i];
      |                     ^
      |                     ;
a.cc:10:13: error: request for member 'begin' in 'A[N]', which is of non-class type 'int'
   10 |   sort(A[N].begin(), A[N].end());
      |             ^~~~~
a.cc:10:27: error: request for member 'end' in 'A[N]', which is of non-class type 'int'
   10 |   sort(A[N].begin(), A[N].end());
      |                           ^~~
a.cc:13:7: error: 'i' was not declared in this scope
   13 |   for(i=0, i<N; i++){
      |       ^
a.cc:13:20: error: expected ';' before ')' token
   13 |   for(i=0, i<N; i++){
      |                    ^
      |                    ;
Language: C++

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

int main() {
	int N;
  int A[N]
  cin >> N;
  for(i=0, i <N; i++) cin >> A[i];
  sort(A[N].begin(), A[N].end());
  int sum1 = 0;
  int sum2 = 0;
  for(i=0, i<N; i++){
    if(i % 2 == 1) sum1 += A[i];
    if(i% 2 == 0) sum2 += A[i];
  }

  cout << sum1 - sum2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected initializer before 'cin'
    8 |   cin >> N;
      |   ^~~
a.cc:9:7: error: 'i' was not declared in this scope
    9 |   for(i=0, i <N; i++) cin >> A[i];
      |       ^
a.cc:9:21: error: expected ';' before ')' token
    9 |   for(i=0, i <N; i++) cin >> A[i];
      |                     ^
      |                     ;
a.cc:9:30: error: 'A' was not declared in this scope
    9 |   for(i=0, i <N; i++) cin >> A[i];
      |                              ^
a.cc:10:8: error: 'A' was not declared in this scope
   10 |   sort(A[N].begin(), A[N].end());
      |        ^
a.cc:13:7: error: 'i' was not declared in this scope
   13 |   for(i=0, i<N; i++){
      |       ^
a.cc:13:20: error: expected ';' before ')' token
   13 |   for(i=0, i<N; i++){
      |                    ^
      |                    ;
Language: C++

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

int main() {
    int N, As = 0, Bs = 0;
    cin >> N;

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

    sort(A.begin(), A.end());
    reverce(A.begin(), A.end());

    for (int i = 0; i < N; i++) {
        if(i % 2 == 0) {
            As += A.at(i);
        }

        else {
            Bs += A.at(i);
        }
    }

    cout << As - Bs << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'reverce' was not declared in this scope
   14 |     reverce(A.begin(), A.end());
      |     ^~~~~~~
Language: C++

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

int main() {
    int N, As = 0, Bs = 0;
    cin >> N;

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

    sort(A.begin(), A.end());
    reverce(A.begin(), A.end());

    for (int i = 0; i < N; i++) {
        if(i % 2 == 0) {
            As += A.at(i);
        }

        else {
            Bs += A.at(i);
        }
    }

    cout << As - Bs << 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++>
using namespace std;

int main() {
    int N, As = 0, Bs = 0;
    cin >> N;

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

    sort(A.begin(), A.end());
    reverce(A.begin(), A.end());

    for (int i = 0; i < N; i++) {
        if(i % 2 == 0) {
            As += A.at(i);
        }

        else {
            Bs += A.at(i);
        }
    }

    cout << As - Bs << 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> a(N);
  int Alice, Bob;
  
  for (int i = 0; i < N; i++){
    cin >> a.at(i);
  }

  sort(a.begin(), a.end());
  reverse(a.begin(), a.end());
  
  for (int j = 0; j < N; j++){
    
    if (j == 0){
      Alice += a.at(j)
    }
    else if (j % 2 == 0){
      Alice += a.at(j);
    }
    else{
      Bob += a.at(j);
    }
  }
  
  cout << Alice - Bob << endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:20:23: error: expected ';' before '}' token
   20 |       Alice += a.at(j)
      |                       ^
      |                       ;
   21 |     }
      |     ~
Language: C++

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

int main () {
    int N;
    cin >> N;
    vector<int> cards(N);
    int total_a = 0, total_b = 0;

    for(int i=0;i<N;i++) {
        cin >> cards[i];
    }
    sort(cards.begin(),cards.end());
    reverse(cards.begin(),cards.end());

    for(int i=0;i<N;i++) {
        if(i == 0 || i % 2 == 0) {
            total_a += cards[i];
        }
        else {
            total_b += cards[i];
        }
    }
    if(total_a > total_b) cout << total_a - total_b << endl;
    else cout << total_b - total_a << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   14 |     sort(cards.begin(),cards.end());
      |     ^~~~
      |     short
a.cc:15:5: error: 'reverse' was not declared in this scope
   15 |     reverse(cards.begin(),cards.end());
      |     ^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  //cin >> N;
  N = 4
  int A, B;
  A = 0;
  B = 0;
  vector<int> card;
  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; i++){
   if(i % 2 == 0){
     A += card.at(i);
   }
    else{
     B += card.at(i); 
    }
  }
      cout << A - B << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:8: error: expected ';' before 'int'
    7 |   N = 4
      |        ^
      |        ;
    8 |   int A, B;
      |   ~~~   
a.cc:9:3: error: 'A' was not declared in this scope
    9 |   A = 0;
      |   ^
a.cc:10:3: error: 'B' was not declared in this scope
   10 |   B = 0;
      |   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A, B, N;
  A = 0;
  B = 0;
  vector<int> card;
  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; i++){
   if(i % 2 == 0){
     A += sort.at(i);
   }
    else{
     B += sort.at(i); 
    }
  }
      cout << A - B << endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:16: error: overloaded function with no contextual type information
   17 |      A += sort.at(i);
      |                ^~
a.cc:20:16: error: overloaded function with no contextual type information
   20 |      B += sort.at(i);
      |                ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A, B, N;
  A = 0;
  B = 0;
  vector<int> card;
  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; i++{
   if(i % 2 == 0){
     A += sort.at(i);
   }
    else{
     B += sort.at(i); 
    }
  }
      cout << A - B << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:28: error: expected ')' before '{' token
   14 |   for(int i = 0; i < N; i++{
      |      ~                     ^
      |                            )
a.cc:16:16: error: overloaded function with no contextual type information
   16 |      A += sort.at(i);
      |                ^~
a.cc:19:16: error: overloaded function with no contextual type information
   19 |      B += sort.at(i);
      |                ^~
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.beigin(),vec.end());
  int alice =0;
  int bob = 0;
  for (int i =0;i<n/2; i+=2) {
    alice +=vec.at(i);
    bob +=vec.at(i+1);
  }
  cout << alice-bob << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:10: error: 'N' was not declared in this scope
    6 |   cin >> N;
      |          ^
a.cc:12:16: error: 'class std::vector<int>' has no member named 'beigin'; did you mean 'begin'?
   12 |   reverse (vec.beigin(),vec.end());
      |                ^~~~~~
      |                begin
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 sum = 0;//合計点
  for (int i = 0;i < N;i++) {
    sum += vec.at(i);
  }
  
  if (N % 2 == 0) {
    int Alice = 0;
    for (int i = 0;i < N / 2;i++) {
      Alice += vec.at(i);
    }
    int Bob = sum - Alice;
    cout << Alice - Bob << endl;
  } else if (N % 2 == 1) {
    int Alice = 0;
    for (int i = 0;i < N / 2 + 1;i++) {
      Alice += vec.at(i);
    }
    int Bob = sum - Alice;
    cout << Alice - Bob << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:10: error: no matching function for call to 'reverse(<unresolved overloaded function type>, std::vector<int>::iterator)'
   13 |   reverse(vec.begin,vec.end());
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
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:1083:5: note: candidate: 'void std::reverse(_BIter, _BIter) [with _BIter = __gnu_cxx::__normal_iterator<int*, vector<int> >]'
 1083 |     reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
      |     ^~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1083:36: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to '__gnu_cxx::__normal_iterator<int*, std::vector<int> >'
 1083 |     reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
      |             ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note: candidate: 'template<class _ExecutionPolicy, class _BidirectionalIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::reverse(_ExecutionPolicy&&, _BidirectionalIterator, _BidirectionalIterator)'
  249 | reverse(_ExecutionPolicy&& __exec, _BidirectionalIterator __first, _BidirectionalIterator __last);
      | ^~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:249:1: note:   candidate expects 3 arguments, 2 provided
Language: C++

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

int main() {
  int N;
  cin >> N;
  int a=0;
  int b=0;
  vector<int> v(N);
  for(int i=0;i<N;i++)
    cin >> v[i];
  
  for(int s=0;s<N;s++){
    for(int t=s+1;t<N;t++){
      if(v[t]>v[s]){
        int k=v[t];
        v[t]=v[s];
    	v[s]=k;
      }
    }
  }//sort
  for(int i=0;i<N;i++){
    if(i%2==0)
      a +=v[i]
    else
      b +=v[i]
      }
  cout << a-b << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:15: error: expected ';' before 'else'
   24 |       a +=v[i]
      |               ^
      |               ;
   25 |     else
      |     ~~~~
Language: C++

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

int main() {
  int N;
  cin >> N;
  int a=0;
  int b=0;
  vecter<int> v(N);
  for(int i=0;i<N;i++)
    cin >> v[i];
  
  for(int s=0;s<N;s++){
    for(int t=s+1;t<N;t++){
      if(v[t]>v[s]){
        int k=v[t];
        v[t]=v[s];
    	v[s]=k;
      }
    }
  }//sort
  for(int i=0;i<N;i++){
    if(i%2=0)
      a +=v[i]
    else
      b +=v[i]
      }
  cout << a-b << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'vecter' was not declared in this scope
    9 |   vecter<int> v(N);
      |   ^~~~~~
a.cc:9:10: error: expected primary-expression before 'int'
    9 |   vecter<int> v(N);
      |          ^~~
a.cc:11:12: error: 'v' was not declared in this scope
   11 |     cin >> v[i];
      |            ^
a.cc:15:10: error: 'v' was not declared in this scope
   15 |       if(v[t]>v[s]){
      |          ^
a.cc:23:9: error: lvalue required as left operand of assignment
   23 |     if(i%2=0)
      |        ~^~
a.cc:24:11: error: 'v' was not declared in this scope
   24 |       a +=v[i]
      |           ^
Language: C++

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

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

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