#include <bits/stdc++.h> using namespace std;

double a[10005]; int n, K;

bool check(int x) { int ans = 0; for(int i = 1;i <= n;i++) { ans += floor(a[i] / x); } return ans >= K; }

int main() { cin >> n >> K; for(int i = 1;i <= n;i++) cin >> a[i];

int L = 1, R = INT_MAX, ans = -1;
while(L <= R)
{
	int mid = (L + R) >> 1;
	if(check(mid)) ans = mid, L = mid + 1;
	else R = mid - 1;
}
cout << ans << endl;
return 0;

}