题解 | #[NOIP2013]记数问题#
[NOIP2013]记数问题
https://www.nowcoder.com/practice/28b2d9f2bf2c48de94a1297ed90e1732
#include <stdio.h> int main() { int n,m; int count=0; scanf("%d%d",&n,&m); for(int i=1;i<=n;i++) { int k=i; while(k>0) { if(k%10==m) count++; k/=10; } } printf("%d\n",count); return 0; }