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                (J U S T   L I K E   E V E R Y O N E   E L S E !)

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*/                              
#include<bits/stdc++.h>
using namespace std;
 
#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define LL long long 
#define mod 1000000007 
#define all(v) v.begin(),v.end()
#define FOR(i, j, k) for (auto i=j ; i<k ; i++)
#define ROF(i, j, k) for (auto i=j ; i>=k ; i--) 
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false); debug("%s time : %.4fs", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))

const long long INF = 1e18;
const long long MAX = 1e5+10;
int main(){
    fastio;
    int t=1;// cin>>t;
    while(t--){
        int n,k ; cin>>n>>k; int a[n]; FOR(i,0,n ) cin>>a[i];
        sort(a,a+n);
        int l = 1, r=1e9,ans=a[0];
        while(l<=r){
            int m = l + (r-l)/2;
            int ks=0;
            FOR(i,0,n) ks+=(a[i]-1)/m;
            if(ks<=k) ans=m,r=m-1;
            else l=m+1;   
           // cout<<m<<" "<<ks<<" ;";
        }   
        cout<<ans;
    }
}


Measured memory_bytes: 4380