#include <iostream>
#include <cstdio>
using namespace std;
int A[1000001];
typedef unsigned long long LL;
int main(){
	freopen("eko.in","r",stdin);
	freopen("eko.out","w",stdout);
	int n;
	cin>>n;
	unsigned long long m,ansl=0;
	int r;
	cin>>m;
	for(int i=1;i<=n;i++){
		cin>>A[i];
		ansl+=A[i];
		r=max(r,A[i]);
	}
	int l=0;r++;
	unsigned long long ansr=0;
	while(l+1<r){
		int mid=(l+r)>>1;
		LL ansm=0;
		for(int i=1;i<=n;i++)
			if(A[i]>mid)
				ansm+=A[i]-mid;
		if(ansm<=m&&m<=ansl){
			r=mid;
			ansr=ansm;
		}
		if(ansm>=m&&m>=ansr){
			l=mid;
			ansl=ansm;
		}
	}
	if(ansr>=m)
		cout<<r<<endl;
	else cout<<l<<endl;
return 0;
}