#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif

int main() {
    int64_t n, k;
    cin >> n >> k;

    int64_t ans = 0;
    for (int64_t x = (1LL << k); x <= (1LL << n); x += (1LL << k)) {
        ans++;
    }

    cout << ans << endl;

    return 0;
}