题解 | #整数中1出现的次数#
整数中1出现的次数（从1到n整数中1出现的次数）
https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6
# -*- coding:utf-8 -*-
class Solution:
def NumberOf1Between1AndN_Solution(self, n):
# write code here
lst = []
for i in range(1,n+1):
lst.append(str(i))
str1 = ''.join(lst)
icount = str1.count("1")
return icount
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