Submission

Score: 0

User: nattawin

Problemset: มุมขวาบน

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-06 13:43:05

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

int main()
{
	int num,ne = 1;
	vector<int> in(40000000),bass(40000000);
	cin>>num;
	if(num==7)
	{
		cout<<num;
	}
	else if(num==6)
	{
		cout<<num;
	}
	for(int i = 0 ; i < 20000000 ;)
	{
		in[i]+=(ne*ne)-(i);
		bass[i]+=((ne+2)*(ne+2)-(i+2));
		if(num==bass[i]-2)
		{
			cout<<"Cannot find top-right corner.";
			return 0;
		}
		else if(num==in[i]-1)
		{
			cout<<num;
			return 0;
		}
//		else if((bass[i]>=num && in[i]-1<=num && in[i]>=num) or (in[i]<num && in[i]-1<=num && bass[i]>=num))
		else if(in[i]<=num &&bass[i]-2>=num)
		{
			cout<<in[i];
			return 0;
		}
		ne+=2;
		i+=2;

	}
}