题解 | #末尾0的个数#
末尾0的个数
https://www.nowcoder.com/practice/6ffdd7e4197c403e88c6a8aa3e7a332a
import sys
n=int(sys.stdin.readline())
val=1
for i in range(1,n+1):
val=val*i
s=list(str(val))
length=len(s)
# print(s)
count=0
for i in range(length-1,0,-1):
# print(s[i])
if int(s[i])==0:
count=count+1
else:
break
print(count)
