n = int(input())

ok = 10 ** 10
ng = 0

while ok - ng > 1:
    mid = (ok + ng) // 2
    if mid * (mid + 1) // 2 >= n:
        ok = mid
    else:
        ng = mid

if ok * (ok + 1) // 2 == n:
    print('YES')
    print(ok)
else:
    print('NO')