제출 #668168

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
668168		fatemetmhr	Boarding Passes (BOI22_passes)	C++17	5 / 100	1 ms	596 KiB

passes

#include <bits/stdc++.h>

using namespace std;

typedef long long   ll;
typedef long double ld;

#define all(x) x.begin(), x.end()
#define pb     push_back
#define fi     first
#define se     second

const int maxn5 = 3e5 + 10;
const ll  inf   = 1e18;

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0);

    string s; cin >> s;
    ll n = s.size();
    ll len1 = n / 2;
    ll len2 = len1 + n % 2;
    cout << setprecision(10) << fixed << ld(len1 * (len1 - 1) + len2 * (len2 - 1)) / 4 << endl;

}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 25
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40