#include <stdio.h>
#include <stdlib.h>
int main(){
　long int a,b,v,w,t,d,dd;
　scanf("%ld %ld",&a,&v);
  scanf("%ld %ld",&b,&w);
  scanf("%ld %ld",&t);
  
  if(v<=w){
    printf("No");
  }
  else if(labs(a-b) <= labs(v-w)*t){
   printf("Yes");
  }
  else {
    printf("No");
  }
  return 0;
}
