#include <cstdio>
#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <cstring>
#include <map>
#include <set>
using namespace std;

#define EPS 1e-12

int main() {
	long double x, y, r;
	int n;
	scanf("%Lf %Lf %d %Lf\n", &x, &y, &n, &r);
	while (x != 0) {
		r = 1 + (r/12)/100;
		for (int i = 0; i < 12*n; ++i) {
			x *= r;
			x -= y;
			if (x < EPS) break;
		}
		printf(x < EPS ? "YES\n" : "NO\n");
		scanf("%Lf %Lf %d %Lf\n", &x, &y, &n, &r);
	}
}