import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Back_1654 {
    public static void main(String[] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int K = Integer.parseInt(st.nextToken());
        int N = Integer.parseInt(st.nextToken());
        int[] arr = new int[K];
        long max = 0;
        for (int i = 0; i < K; i++) {
            arr[i] = Integer.parseInt(br.readLine());
            if (max < arr[i]) {
                max = arr[i];
            }
        }
        max++; // 안해주면 런타인 오류 뜸

        long min = 0;
        long mid = 0;
        while (min < max) {

            mid = (max + min) / 2;   // 중간값

            long count = 0;

            for (int i = 0; i < arr.length; i++) {
                count += (arr[i] / mid);
            }

            if (count < N) {
                max = mid;
            } else {
                min = mid + 1;
            }
        }

        System.out.println(min - 1);
        br.close();
    }
}