(C++) - 백준(BOJ)1568번 : 새 답

https://www.acmicpc.net/problem/1568

#include <iostream>
using namespace std;
int main() {
    int bird, k = 1, cnt = 0;
    cin >> bird;
    while (bird > 0)
    {
        if (k > bird) { k = 1; }
        bird -= k;
        cnt++;
        k++;
    }
    cout << cnt << '\n';
}