#include <stdio.h>

int main(void) {
	int a, v, b, w, t;
	int dis = 0;

	scanf("%d", &a);
	scanf("%d", &v);
	scanf("%d", &b);
	scanf("%d", &w);
	scanf("%d", &t);

	dis = abs(b - a);

	double tmp = (double)dis / (v - w);

	if (tmp <= t && tmp >= 0) {
		puts("YES");
	}
	else {
		puts("NO");
	}

	return 0;
}