#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
using namespace std;

int main() { 
    int n;
    string k;
    cin >> n >> k;
    
    vector <string> v(n);
    
    for (int i = 1; i <= n; i++) {
        v[i - 1] = to_string(i);
    }
    
    sort(v.begin(), v.end());
    
    for (int i = 1; i <= n; i++) {
        if (k == v[i - 1]) {
            cout << i;
        }
    }
    
    return 0;
}