process.stdin.resume();
process.stdin.setEncoding('utf8');
                     
var lines = [];
var reader = require('readline').createInterface({
    input: process.stdin,
    output: process.stdout
});
reader.on('line', (line) => {
    // ここで入力を処理する
    lines.push(line);
});
reader.on('close', () => {
    // ここで出力する
  var A = Number(lines[0].split(" ")[0]);
  var V = Number(lines[0].split(" ")[1]);
  var B = Number(lines[1].split(" ")[0]);
  var W = Number(lines[1].split(" ")[1]);
  var T = Number(lines[2].split(" ")[0]);
  
  var D = Math.abs(A-B);
  var S = V-W;

  if(D<=S*T){
    console.log("YES");
  }else{
    console.log("NO");
  }
});
