#include<bits/stdc++.h>
#define int long long
using namespace std;
// #define fin cin
// #define fout cout
ifstream fin("eagleegg.in");
ofstream fout("eagleegg.out");
auto mread = [](){
    int x;
    fin >> x;
    return x;
};
const int N = 1e3 + 5;
int n = 1000, m = 10, f[N][N];
signed main(){
    memset(f, 0x3f, sizeof(f));
    for(int i = 1; i <= 10; i ++){
        f[1][i] = 1;
        f[0][i] = 0;
    }
    for(int i = 2; i <= n; i ++){
        for(int j = 1; j <= m; j ++){
            for(int k = 1; k <= i; k ++){
                if(j > 1){
                    f[i][j] = min(f[i][j], max(f[k - 1][j - 1], f[i - k][j]) + 1);
                }
                else{
                    f[i][j] = f[i - 1][j] + 1;
                }
            }
        }
    }
    int a, b;
    while(fin >> a){
        fin >> b;
        if(a == 0 && b == 0){
            return 0;
        }
        fout << f[b][min(10ll, a)] << "\n";
    }
    return 0;
}