program TMPC2020B
    implicit none
    integer(8)A,V,B,W,T
    read*,A,V,B,W,T
    if(B>A)then
        if(B+T*W>A+T*V)then
            print'(A)',"NO"
        else
            print'(A)',"YES"
        end if
    else
        if(B-T*W<A-T*V)then
            print'(A)',"NO"
        else
            print'(A)',"YES"
        end if
    end if
end program TMPC2020B