#include<bits/stdc++.h>
#define int long long
#define IOS ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
using namespace std;
int t,n,x,y;

signed main() {
    IOS;
    cin>>n>>x;
    __int128 m=x;
    vector<__int128> a(n+2),sum(n+1);
    for(int i=1;i<=n;i++) {
        cin>>x;
        a[i]=x;
        sum[i]=sum[i-1]+a[i];
    }
    int l=0,r=n;
    a[n+1]=1;
    while(l<r) {
        int mid=(l+r)>>1;
        if(m>sum[mid]+(a[mid+1]-1)*(mid+1)) {
            l=mid+1;
        }
        else {
            r=mid;
        }
    }
    cout<<min(l,n)<<endl;
    return 0;
}