记数问题

#include<stdio.h>
int main()
{
    int n,x,i,c=0,yu,s;
    scanf("%d %d",&n,&x);
    for(i=1;i<=n;i++)
    {
        s=i;
        while(s>0)
        {
            yu=s%10;
            if(yu==x)
            c++;
            s=s/10;
        }
    }
    printf("%d",c);
}