제출 #1163419

#제출 시각아이디문제언어결과실행 시간메모리
1163419gohchingjaykEkoeko (COCI21_ekoeko)C++20
10 / 110
0 ms396 KiB
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
#define int ll

int n;
signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr); cout.tie(nullptr);
	
	cin >> n;
	cout << n * n / 4;
}
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