#include <bits/stdc++.h>
using namespace std;
const int N = 5000001;
int a[N], b[N], c[N];
int main() {
    int n, k,t = 2,h = 1;
    cin >> n >> k;
    if(k == 1){
    	cout << n;
    	return 0;
	}
    for(int i = 2;t <= k;i++){
    	t *= 2;
    	h++;
	}
	for(int i = n - t;t <= n;i++){
    	t += k;
    	h++;
	}
    cout << h;
    return 0;
}

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