#include <bits/stdc++.h>
using namespace std;
 
void fast(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(0);cout.tie(0);
}
map<int,long long>mpa,mpb;
 
int main(){
    fast();
    int t=1;
    //cin>>t;
    while(t--){
        int n;
        long long s;
        cin>>n>>s;
        long long arr[n];
        for(int i=0;i<n;i++){
            cin>>arr[i];
        }
        int l=0,r=0,mx=0;
        long long sum=0;
        while(r<n){
            sum+=arr[r];
            while(sum>s){
                sum-=arr[l];
                l++;
            }
            mx=max(mx,r-l+1);
            r++;
        }
        cout<<mx;
    }
}
 

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