program panasonic2020C
    implicit none
    integer(8)::a,b,c
    read*,a,b,c
    if(c-a-b>=0.and.4*a*b<(c-a-b)**2)then
        print'(A)',"Yes"
    else
        print'(A)',"No"
    end if
end program panasonic2020C