import std.stdio, std.algorithm, std.array, std.conv, std.string;

void main()
{
    auto nm = readln().split().map!(to!long);
    auto c = readln().split.map!(to!long);
    long cnt = 0;
    long m = nm[1];
    foreach(ci; c) {
        if (m - ci < 0) {
            break;
        } else if (m - ci == 0) {
            cnt++;
            break;
        }
        cnt++;
        m -= ci;
    }
    writeln(cnt);
}