#include <stdio.h>

int main(){
    long a, v, b, w, t;

    scanf("%ld %ld %ld %ld %ld", &a, &v, &b, &w, &t);
    
    if (a < b) {
        int m1 = a + v * t;
        int m2 = b + w * t;
        if (m1 >= m2) {
            printf("YES");
        } else {
            printf("NO");
        }
    } else {
        int m1 = a - v * t;
        int m2 = b - w * t;
        if (m1 <= m2) {
            printf("YES");
        } else {
            printf("NO");
        }
    }
}
