数位递增的数

import os
import sys

# 请在此输入您的代码

n = int(input())
res = 0
for i in range(1,n+1):
    num = str(i)
    flag = 0
    for j in range(len(num)-1):
        if num[j]>num[j+1]:
            flag = 1
    if flag == 0:
        res+= 1
print(res)

1.数位递增的数 - 蓝桥云课