29 lines
625 B
C++
29 lines
625 B
C++
#include <bits/stdc++.h>
|
||
|
||
using namespace std;
|
||
|
||
|
||
int mycount(const int n, int x) {
|
||
int all = 0;
|
||
//n不能进行修改，需要克隆出来一个v
|
||
int v = n;
|
||
//循环求出此数的每一位
|
||
while (v > 0) {
|
||
int gewei = v % 10; //套路！
|
||
v = v / 10;
|
||
if (gewei == x) all++;
|
||
}
|
||
return all;
|
||
}
|
||
|
||
int main() {
|
||
ios::sync_with_stdio(false); //读入输出优化的强迫症
|
||
int n, x;
|
||
cin >> n >> x;
|
||
int allcount = 0;
|
||
for (int i = 1; i <= n; i++) {
|
||
allcount += mycount(i, x);
|
||
}
|
||
cout << allcount << endl;
|
||
return 0;
|
||
} |