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 = 0; int x = 0; scanf("%d %d", &n, &x); int i = 0; int count = 0; for(i = 1; i <= n; i++) { int j = i; while(j) { if(j % 10 == x) { count++; } j = j / 10; } } printf("%d", count); return 0; }