제출 #1098905

#제출 시각아이디문제언어결과실행 시간메모리
1098905ohadBoarding Passes (BOI22_passes)C++14
0 / 100
1 ms344 KiB
#include <iostream>
#include <string>
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
	{
		cout << (size / 2 * (size / 2 - 1)) / double(4) + ((size / 2 + 1) * (size / 2)) / double(4);
	}
}
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