#include<iostream>
#include<stdio.h>
using namespace std;
int v[16001];
int main()
{
    freopen("transport.in","r",stdin);
    freopen("transport.out","w",stdout);
    int l1,l2,nrt,cap,i,k,n;
    cin>>n>>k;
    l1=1;
    l2=n;
    cap=(l1+l2)/2;
    for(i=1;i<=n;i++)
        cin>>v[i];
    while(cap<=n)
    {
        for(i=1;nrt<=cap&&i<=n;i++)
            nrt=nrt+v[i];
        k++;
        cap++;
    }
    cout<<cap;
    return 0;
}