program sqrt
    implicit none
    integer :: i, j, k

    read *, i, j, k

    if ((floor(i**0.5) + floor(j**0.5)) < floor(k**0.5)) then
        print *, "Yes"
    else if ((floor(i**0.5) + floor(j**0.5)) > floor(k**0.5)) then
        print *, "No"
    else if ((floor(i**0.5) + floor(j**0.5)) == floor(k**0.5)) then

    end if

end program sqrt
