import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int x = sc.nextInt();
		int n2 = n * 2;
		long[] a = new long[n2 + 1];
		for (int i = 1; i <= n; i++) {
			a[i] = sc.nextInt();
			a[i + n] = a[i];
		}
		sc.close();

		long ans = 0;
		long val = 0;
		int r = 0;
		for (int l = 0; l <= n; l++) {
			while (r < n2 && r - l < n - 1 && val <= x) {
				r++;
				val += a[r];
				if (val <= x) {
					ans = Math.max(ans, val);
				} else {
					break;
				}
			}
			val -= a[l];
			if (val <= x) {
				ans = Math.max(ans, val);
			}
		}
		System.out.println(ans);
	}
}