using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, x) = (c[0], c[1]);
        var a = NList.ToList();
        for (var i = 0; i + 1 < n; ++i) a.Add(a[i]);
        var r = 0;
        var sum = 0L;
        var ans = 0L;
        for (var l = 0; l < n; ++l)
        {
            while (r < a.Count && r - l <= n && sum <= x)
            {
                ans = Math.Max(ans, sum);
                sum += a[r];
                ++r;
            }
            sum -= a[l];
        }
        WriteLine(ans);
    }
}