#include <stdio.h>
#include <math.h>

#define labs(a) ((a>0)?a:-a)

int main(void){
    long long int a,b;
    unsigned long int v,w;
    unsigned long int t;
    scanf("%lld %lu",&a,&v);
    scanf("%lld %lu",&b,&w);
    scanf("%lu",&t);

    if(v == w){
        printf("NO");
        return 0;
    }
    /*if(w>v){
        printf("NO");
        return 0;
    }*/


    (((double)(labs(a)-labs(b))/(double)(labs(w)-labs(v))) <= t)?printf("YES"):printf("NO");


    return 0;
}