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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,X; cin >> N >> X;
    vector<int> A(N);
    for(auto &a : A) cin >> a;
    for(int i=0; i<N; i++) A.push_back(A.at(i));

    int pos = 0,sum = 0,answer = 0;
    for(int i=0; i<N; i++){
        if(i) sum -= A.at(i-1);
        while(pos < i+N){
            if(sum+A.at(pos) > X) break;
            sum += A.at(pos); pos++;
        }
        answer = max(answer,sum);
    }
    cout << answer << endl;
}