#include <iostream>
#include <cstdlib>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
    int N, W, C; cin >> N >> W;
    int cnt = 0, sum = 0;
    for(int  i = 0; i < N; i++){
        cin >> C;
        sum += C;
        if(sum < W){
            cnt++;
        }else if(sum >= W){
            break;
        }
    }
    cout << cnt << endl;
    return 0;
}