#include <iostream>

constexpr size_t MAX_HEIGHT = 4e4 + 1, MAX_EGGS = 30, INF = 0x3f3f3f3f;
int eggs_amount, height;

int dp[MAX_HEIGHT][MAX_EGGS];
bool ping_pong;

void print_dp(std::ostream& os = std::clog, int h = MAX_HEIGHT - 1) {
    for (int i = 0; i <= h; i++) {
        for (int j = 0; j < MAX_EGGS; j++) {
            os << dp[i][j] << " ";
        }
        os << std::endl;
    }
}

void init_dp() {
    for (int i = 0; i < MAX_HEIGHT; i++) {
        dp[i][1] = i;
    }
    for (int h = 1; h < MAX_HEIGHT; h++) {
        for (int eggs = 2; eggs < MAX_EGGS; eggs++) {
            int min_value = +INF;
            for (int i = 1; i <= h; i++) {
                min_value = std::min(
                    min_value, std::max(dp[i - 1][eggs - 1], dp[h - i][eggs]));
            }
            dp[h][eggs] = min_value + 1;
            if (eggs >= dp[h][eggs]) {
                for (int i = eggs; i < MAX_EGGS; i++) { dp[h][i] = dp[h][eggs]; }
                break;
            }
        }
    }
    print_dp(std::clog, 100);
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    init_dp();
    while (std::cin >> height >> eggs_amount && height) {
        // if (height >= MAX_HEIGHT || eggs_amount >= MAX_EGGS) {
        //     throw std::overflow_error("Oh no!");
        // }
        // if (eggs_amount >= MAX_EGGS) { eggs_amount = MAX_EGGS - 1; }
        std::cout << dp[height][eggs_amount] << std::endl;
    }
    return 0;
}