题解 | #挑7#
挑7
https://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
import sys n = int(input()) result = 0 for i in range(1,n+1): #遍历1到n之间的所有数 if i%7 == 0: #判断是否能被7整除 result += 1 # print(i) else: i = str(i) #将能被7整除之外的数字转化为字符串 for j in range(len(i)): #遍历转换后的字符串 if int(i[j]) == 7: #判断是否含7 result += 1 # print(i) # continue break #若含7则可跳出这个小循环,进行下一个数的判断 print(result)