#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define rrep(i,a,b) for(ll i=a-1;i>=b;i--)
#define ll long long
#define ull unsigned ll
#define ld long double
#define bl __int128_t
#define fi first
#define se second
#define vel vector<ll>
#define vvel vector<vel>
#define pll pair<ll,ll>
#define vepll vector<pll>
#define vvepll vector<vepll>
#define ves vector<string>
#define vem vector<mint>
#define vvem vector<vem>
#define pmm pair<mint,mint>
#define cleout(i) cout<<fixed<<setprecision(i)
#define mat Matrix<SemiRing>
template<class T>using PQ=priority_queue<T,vector<T>,greater<T>>;
//               上  右 下 左
vector<int> di={-1, 0, 1, 0};
vector<int> dj={ 0, 1, 0,-1};

vector<int> dx={ 0, 1, 0,-1};
vector<int> dy={ 1, 0,-1, 0};


vector<int> ddx={ 1, 1, 1, 0, -1, -1, -1, 0 };
vector<int> ddy={ 1, 0, -1, -1, -1, 0, 1, 1 };

ll inf=1000000000000000000;//1e18
// LLONG_MAX

mt19937_64 rng((ull)chrono::steady_clock::now().time_since_epoch().count());



void _solve(){
    ll N,S;
    cin>>N>>S;
    vel a(N);
    rep(i,0,N)cin>>a[i];
    sort(a.rbegin(),a.rend());
    auto check=[&](ll mid){
        //最初のmid個を消す(a[0])
        if(mid<a[0])return 1ll;
        ll ok=S-1;
        for(ll i=0;i<N;){
            if(a[i]>mid){
                ok-=a[i];
                if(ok<0)return 0ll;
            }else{
                return (ll)(ok>=0);
            }
            i+=mid;
        }
        return 1ll;
    };
    {
        ll ok=inf;
        ll ng=0;
        while(ok-ng>1){
            ll mid=(ok+ng)/2;
            if(check(mid))ok=mid;
            else ng=mid;
        }
        cout<<ok<<"\n";
    }
}


int main(){
    cin.tie(nullptr);
 	ios_base::sync_with_stdio(false);

    
    ll _;
    bool multitest=0;
    if(multitest)cin>>_;
    else _=1;
    rep(__,0,_){
        _solve();
    }
}