-module('Main').
-export([main/1]).

main(_) ->
    {ok, [A, V]} = io:fread("", "~d ~d"),
    {ok, [B, W]} = io:fread("", "~d ~d"),
    {ok, [T]} = io:fread("", "~d"),
    D = V - W,
    case abs(B - A) =< T * D  of
        true ->
            io:format("YES~n");
        false ->
            io:format("NO~n")
    end,
    halt().
