제출 #1098910

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1098910		ohad	Boarding Passes (BOI22_passes)	C++14	0 / 100	1 ms	604 KiB

passes

#include <iostream>
#include <vector>
#include <cmath>
#include <iomanip>
#include <stdio.h>
using namespace std;
typedef long long ll;

int main() {
	string a;
	cin >> a;
	ll size = a.length();
	if (size % 2 == 0)
		cout << (size / 2 * (size / 2 - 1)) / double(2);
	else
	{
		double x = ((size / 2 * (size / 2 - 1)) / double(4));
		double y = ((size / 2 + 1) * (size / 2)) / double(4);
		y += x;
		cout << fixed << setprecision(6) << y;
	}
}

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