n = int(input())
high = 2*10**18
low = 0
flag = 0
while high-low>1:
    mid = (high+low)//2
    k = (mid*(mid+1))//2
    if k>n:
        high = mid
    elif k<n:
        low = mid
    else:
        flag = 1
        break
if flag==1:
    print("YES")
    print(mid)
else:
    print("NO")