#include <stdio.h>
int main(void){
 
 int kyori,hayasa,a,v,b,w,t;
 
 scanf("%d %d",&a,&v);
scanf("%d %d",&b,&w);
scanf("%d",&t);

if(a>b){
    kyori=a-b;
    
}else{
    kyori=b-a;
}

if(v>w){
    hayasa=v-w;
    
}else{
    hayasa=w-v;
    
    
}

if(kyori>hayasa*t){
    
    printf("NO\n");
    
}else{
    printf("YES\n");
    
    
    
}

 return(0);
    
}
