program main
    implicit none
    integer(8) a, b, v, w, t
    integer flag

    read(*,*) a, v
    read(*,*) b, w
    read(*,*) t

    flag = 0

    if(a > b) then
        if(a-v*t <= b-w*t) then
            flag = 1
        end if
    else if (a < b) then
        if(a+v*t >= b+w*t) then
            flag = 1
        end if
    else if (a == b) then
        flag = 1
    end if

    if(flag == 1) then
        write(*,*) "YES"
    else
        write(*,*) "NO"
    end if

end program

