Submission #2498399

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Source Code Expand

#include <algorithm>
#include <iostream>
#include <string.h>
#include <stdio.h>
#include <vector>
#include <queue>
#include <cmath>
#include <map>
#include <set>

#define N 100010
#define ff first
#define ss second
#define pb push_back
#define ll long long
#define pii pair <int, int>
#define PI 3.1415926535897932384626433832795

using namespace std;

int x;

int main()
{
	cin >> x;
	
	for(int i = x; i >= 1; i--) {
		int sq = sqrt(i);
		
		if(sq * sq == i) {
			cout << i;
			return 0;
		}
	}
}

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