Submission #1098869

#	Time	Username	Problem	Language	Result	Execution time	Memory
1098869		not_amir	Boarding Passes (BOI22_passes)	C++14	0 / 100	1 ms	348 KiB

passes

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

typedef long double ld;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    ld n1 = n / 2, n2 = (n + 1) / 2;
    ld ans = (n1 * (n1 - 1) + n2 * (n2 -1)) / 4.0;
    cout << fixed << setprecision(6) <<  ans;
}

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