| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 1296325 | LIA | Chessboard (IZhO18_chessboard) | C++17 | 2 ms | 572 KiB |
//
// Created by liasa on 28/11/2025.
//
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define lp(i, s, e) for (int i = s; i < e; ++i)
#define v vector
int n,k;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin>>n>>k;
ll ans = ceil(n/2);
ans*=n;
cout<<ans;
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