题解 | #[NOIP2013]记数问题#
[NOIP2013]记数问题
https://www.nowcoder.com/practice/28b2d9f2bf2c48de94a1297ed90e1732
n,x=map(int,input().split())
list1=[]
for i in range(1,n+1):
if str(x) in str(i):
list1.append(str(i).count(str(x)))
print(sum(list1))
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