"use strict";

const main = arg => {
    const input = arg.trim().split("\n");

    const A = parseInt(input[0].split(" ")[0]);
    const V = parseInt(input[0].split(" ")[1]);
    const B = parseInt(input[1].split(" ")[0]);
    const W = parseInt(input[1].split(" ")[1]);
    const T = parseInt(input[2].split(" ")[0]);
    const a = T*V
    const b = T*W
    const diff = A > B ? A-B : B-A
    if(diff + b <= a) console.log("YES")
    else console.log("NO")
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));  