Submission #824017

#	Time	Username	Problem	Language	Result	Execution time	Memory
824017		ttamx	Boarding Passes (BOI22_passes)	C++14	0 / 100	1 ms	212 KiB

passes

#include<bits/stdc++.h>

using namespace std;

typedef long double ld;

const int G=20;
const int N=1e5+5;

int n,g;

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cout << fixed;
    int n;
    cin >> n;
    if(n%2==0){
        cout << 0.5l*(n/2)*(n/2-1);
    }else{
        cout << 0.5l*(1.l*(n/2)*(n/2-1)+(n/2));
    }
}

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