n = int(input())

ok = 1
ng = 2 * 10**10

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

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