C :

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

C++ :

#include <bits/stdc++.h>
using namespace std;

int main(){
	int i,n,x,t,c = 0;
	cin>>n>>x;
	for(i = 1;i <= n;i++){
		t = i;
		while(t != 0){
			if(t % 10 == x){
				c++;
			}
			t = t / 10;
		}
	}
	
	cout<<c<<endl;
}

Java :

import java.util.Scanner;
public class Main
{
	public static void main(String[] Args)
	{
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int b = 0;
		int s = 0;
		int k = 0;
		for(int j = 1; j<=n ; j++)
		{
			b = j;
			while(b!=0){
				s = b%10;
				b = b/10;
				if(s == m) k++;
			}
		}
		System.out.println(k);
	}
}

Python :

# 接收两个字符串数字,放入列表s中
s = input().split()
# 字符串数字转化为整数,n表示整数,x表示要统计的数字
n = int(s[0])
x = int(s[1])
# 初始化计数c
c = 0
for i in range(1, n + 1):
    a = i
    #短除法拆位,如果得出的数==x,则计数c自加1
    while a > 0:
        s = a % 10
        a //= 10
        if s == x:
            c += 1
print(c)