integer(kind=8)::i,Mutton
real(kind=8)::n
read *,n

i=(sqrt(1+8*n)-1)/2
Mutton=(i**2+i)/2
Mutton2=((i-1)**2+i-1)/2
Mutton3=((i+1)**2+i+1)/2

if(Mutton==n .or. Mutton2==n .or. Murron3==n) then
 print *,"YES"
 print *,i
else
 print *,"NO"
end if

end