#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
  int N, X;
  cin >> N >> X;
  vector<int> A(N*2);
  rep(i, N) {
    cin >> A[i];
    A[i+N] = A[i];
  }
  int poligon = 0;
  int y = 0;
  int maxPoligon = 0;
  rep(i, N) {
    while (poligon + A[y] <= X) {
      poligon += A[y];
      y++;
    }
    maxPoligon = max(poligon, maxPoligon);
    poligon -= A[i];
  }
  cout << maxPoligon << endl;
  return 0;
}