Submission #1296329

#	Time	Username	Problem	Language	Result	Execution time	Memory
1296329		LIA	Chessboard (IZhO18_chessboard)	C++17	0 / 100	1 ms	572 KiB

chessboard

//
// 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

ll n, k;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> n >> k;
  if (n % 2 == 0) {
    ll ans = ceil(n / 2);
    ans *= n;
    cout << ans;
  } else {
    ll ans = (n / 2LL) * (ll)ceil(n / (double)2);
    // 1*2
    ans += (n / 2) * (ll)ceil(n / (double)2);

    cout << ans;
  }
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 8
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 23
• Subtask 6: 0 / 30