80分求助，第四个点WA

#include <bits/stdc++.h>
using namespace std;
long long n, cnt = 0;
double i, s = 2.0;

int main() {
	cin >> n;
	while (i < n) {
		i += s;
		s = s * 0.98;
		cnt++;
	}
	cout << cnt;
	return 0;
}