Submission #823760

#	Time	Username	Problem	Language	Result	Execution time	Memory
823760		ttamx	Boarding Passes (BOI22_passes)	C++14	0 / 100	1 ms	340 KiB

passes

#include<bits/stdc++.h>

using namespace std;

typedef long double ld;

const int G=20;
const int N=15;

int n,g;
ld dp[N];

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    string s;
    cin >> s;
    n=s.size();
    for(int i=1;i<=n;i++){
        dp[i]=dp[i-1];
        dp[i]+=1.l*(1ll*(i/2)*(i/2-1))/i;
        if(i&1)dp[i]+=1.l*(i/2)/i;
    }
    cout << dp[n] << "\n";
}

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