Submission #821342

#	Time	Username	Problem	Language	Result	Execution time	Memory
821342		devariaota	Ekoeko (COCI21_ekoeko)	C++17	0 / 110	1 ms	212 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define longlonginf LONG_LONG_MAX
using namespace std;

ll n,m,x;
ll l,r;
string s;

bool subtask1(){
  for(int i = 0 ; i < n/2 ; i++) if( s[i] != 'a' ) return 0;
  for(int i = n ; i < n/2 + 1 ; i++) if( s[i] != 'b' ) return 0;
  return 1;
}

void solve(){
  cin>>n;
  cin>>s;
  if( subtask1() ){
    n /= 2;
    n--;
    cout<<(n*(n+1))/2<<"\n";
  }
}

int main(){
  int T = 1;
  //cin>>T;
  for(int i = 1 ; i <= T ; i++){
    solve();
  }
  return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 40