N = int(input())
M = int((2 * N)**0.5 - 0.1) + 1

if M * (M + 1) == 2 * N:
    print('YES')
    print(M)

elif M * (M - 1) == 2 * N:
    print('YES')
    print(M - 1)

else:
    print('NO')