백준 2417번 정수 제곱근 C++

출처 : https://www.acmicpc.net/problem/2417

 

sqrt를 사용하였다.

 

#include <iostream>
#include <string>
#include <vector>
#include <math.h>
#include <algorithm>
#include <utility>
#include <stack>
#include <queue>
#include <math.h>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>

using namespace std;
using ll = long long;
using ull = unsigned long long;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);

	ll n;
	cin >> n;
	ll q = sqrt(n);
	if (q * q >= n) cout << q;
	else cout << q + 1;
};