#include <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
using namespace std;

using namespace std;

int n,m;
int ans;

signed main(){
    cin>>n>>m;
    for(int i = 1;i <= n;i++){
        int x;
        cin>>x;
        if(m >= x){
            m = m - x;
            ans++;
        }else{
            cout<<ans<<endl;
            return 0;
        }
    }
    return 0;
}