#include<bits/stdc++.h>
#define CSP2026 using
#define RP namespace
#define PLUSPLUS std
CSP2026 RP PLUSPLUS;
#define debug(x) cout<<"clock="<<clock()<<' '<<#x<<'='<<(x)<<'\n'
//#define getchar getchar_unlocked
using ll=long long;
inline int rd(){int x=0,f=1;char ch=getchar();for(;!isdigit(ch);ch=getchar())if(ch=='-')f=-1;for(;isdigit(ch);ch=getchar())x=(x<<3)+(x<<1)+(ch^48);return x*f;}
inline ll rdll(){ll x=0;int f=1;char ch=getchar();for(;!isdigit(ch);ch=getchar())if(ch=='-')f=-1;for(;isdigit(ch);ch=getchar())x=(x<<3)+(x<<1)+(ch^48);return x*f;}
constexpr int N=3e5+5;
int a[N];
signed main(){
	int n=rd(),s=rd();
	for(int i=1;i<=n;++i)a[i]=rd();
	sort(a+1,a+n+1);
	int l=1,r=a[n],ans=0;
	while(l<=r){
		int mid=(l+r)>>1,flag=0;
		int t=upper_bound(a+1,a+n+1,mid)-a;
		ll sum=(t==1?0:1);
		for(int i=n;i>=t;i-=mid)sum+=a[i],flag=1;
		if(sum+flag<=s)ans=mid,r=mid-1;
		else l=mid+1;
	}cout<<ans<<'\n';
}