Submission #1091865

#	Time	Username	Problem	Language	Result	Execution time	Memory
1091865		KluydQ	Odd-even (IZhO11_oddeven)	C++17	0 / 100	2064 ms	348 KiB

oddeven

#include <bits/stdc++.h>

#define FOR( i, x, n, d ) for( int i = x; i <= n; i += d )
#define int long long

using namespace std;
const int N = 1e5;

signed main()
{
	ios_base::sync_with_stdio(0), cin.tie(0);
	
	int n; cin >> n;
	int ans = 0;
	
	for( int i = 0; n > 0; i ++ )
	{
		if( i >= n ) ans += ( n - 1 ) * 2 + 1, n = 0;
		else n -= i + 1, ans += i * 2 + 1;
	}
	cout << ans;
}
// n i ans
// 3 0 1
// 1 1 3
// 

• Subtask 1: 0 / 100