Language: C++

ｖ#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
#define _USE_MATH_DEFINES
#include <math.h>
#define rep(i,n) for(int i = 0;i < n;i++)
#define NIL = -1;
#define all(x) x.begin(),x.end()
const ll INF = 1e9;
const ll mod = 1e9 + 7;
 
int digit(ll x) {
    if (x / 10 == 0) return 1;
    return digit(x / 10) + 1;
}
 
ll gcd(long long a,long long b) {
    if (a < b) swap(a,b);
    if (b == 0) return a;
    
    return gcd(b,a%b);
}

bool is_prime(long long N){
    if (N == 1) return false;
    for (long long i = 2;i * i <= N;i++){
        if (N % i == 0) return false;
    }
    return true;
}
 
ll lcm(ll a,ll b){
    return ((a * b == 0)) ? 0 : (a / gcd(a,b) * b);
}
 
double DegreeToRadian(double degree){
    return degree * M_PI / 180.0;
}
 
 
int dx[4] = {0,1,0,-1};
int dy[4] = {1,0,-1,0};
 
 
///////////////////////////////////////////////////////////////////////////////////

int main(){
    int n;
    cin >> n;
    vector<char> s(n+1);
    int r = 0, g = 0, b = 0;
    for (int i = 1;i <= n;i++){
        cin >> s[i];
        if (s[i] == 'R') r++;
        else if (s[i] == 'G') g++;
        else b++;
    }

    int ans = r*g*b;

    for (int i = 1;i <= n;i++){
        int k = j + j - i;
        if (k > n) continue;
        if (s[i] != s[j] && s[i] != s[k] && s[j] != s[k]){
            ans--;
        }
    }

    cout << ans << endl;
    return 0;
}   

Compiler output:
a.cc:1:3: error: stray '#' in program
    1 | ｖ#include "bits/stdc++.h"
      |   ^
a.cc:1:1: error: '\U0000ff56' does not name a type
    1 | ｖ#include "bits/stdc++.h"
      | ^~
a.cc: In function 'll gcd(long long int, long long int)':
a.cc:18:16: error: 'swap' was not declared in this scope
   18 |     if (a < b) swap(a,b);
      |                ^~~~
a.cc:18:16: note: suggested alternatives:
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/bits/specfun.h:43,
                 from /usr/include/c++/14/cmath:3906,
                 from /usr/include/c++/14/math.h:36,
                 from a.cc:5:
/usr/include/c++/14/bits/stl_pair.h:1106:5: note:   'std::swap'
 1106 |     swap(pair<_T1, _T2>&, pair<_T1, _T2>&) = delete;
      |     ^~~~
In file included from /usr/include/c++/14/bits/stl_pair.h:61:
/usr/include/c++/14/bits/move.h:226:5: note:   'std::swap'
  226 |     swap(_Tp& __a, _Tp& __b)
      |     ^~~~
/usr/include/c++/14/bits/move.h:226:5: note:   'std::swap'
a.cc: In function 'int main()':
a.cc:49:5: error: 'cin' was not declared in this scope; did you mean 'sin'?
   49 |     cin >> n;
      |     ^~~
      |     sin
a.cc:50:5: error: 'vector' was not declared in this scope
   50 |     vector<char> s(n+1);
      |     ^~~~~~
a.cc:50:12: error: expected primary-expression before 'char'
   50 |     vector<char> s(n+1);
      |            ^~~~
a.cc:53:16: error: 's' was not declared in this scope
   53 |         cin >> s[i];
      |                ^
a.cc:62:17: error: 'j' was not declared in this scope
   62 |         int k = j + j - i;
      |                 ^
a.cc:64:13: error: 's' was not declared in this scope
   64 |         if (s[i] != s[j] && s[i] != s[k] && s[j] != s[k]){
      |             ^
a.cc:69:5: error: 'cout' was not declared in this scope
   69 |     cout << ans << endl;
      |     ^~~~
a.cc:69:20: error: 'endl' was not declared in this scope
   69 |     cout << ans << endl;
      |                    ^~~~