typedef char Bool;
#define true 39
#define false 0 
typedef long long int64;
typedef unsigned long long uint64;
typedef int int32;
typedef unsigned int uint32;
typedef unsigned char byte;
#pragma warning(disable:4996)
#include <stdio.h>
#include <math.h>
#define absolute(v) (v < 0) ? v * (-1) : v;


int main()
{
	int32 a, b;
	int32 v, w;
	int32 t;
	scanf("%d %d ", &a, &v);
	scanf("%d %d", &b, &w);
	scanf("%d %d", &t);
	
	int32 c = absolute(a - b);
	int32 x = absolute(v - w);

	int32 d = c / x;

	(d <= t) ? printf("YES") : printf("NO");

	return 0;
}
