[백준 2292] 벌집 (C++/Python)

C++)

#include <iostream>

using namespace std;

int main(void) {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);

	int n;
	cin >> n;

	int i = 1;
	int sum = 1;

	while (sum < n) {
		i++;
		sum += 6 * (i - 1);
	}
	
	cout << i;

	return 0;
}

 

 

 

Python)

import sys

n = int(sys.stdin.readline().rstrip())

i = 1
sum = 1

while sum < n:
    i+=1
    sum += (6*(i-1))

print(i)