Submission

Score: 100

User: kavin8888

Problemset: มุมขวาบน

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-20 09:59:20

#include<bits/stdc++.h>
using namespace std;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int n; cin>>n;
	int sz=1;
	vector<int> tp;
	tp.push_back(1);
	for(int i=6;sz<n;i+=8)
	{
		sz+=i;
		tp.push_back(sz);
	}
	if(tp.back()-n==2)
	{
		cout<<"Cannot find top-right corner.";
	}
	else
	{
		cout<<tp[tp.size()-2];
	}
}