#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;
}
 
 
 

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