# https://yukicoder.me/problems/no/2601

MOD = 998244353

def main():
    N, X = map(int, input().split())
    A = list(map(int, input().split()))

    A = A + A

    answer = 0
    left = 0
    right = 0
    ans = 0
    while left < N and A[left] > X:
        left += 1
        right += 1
    if left < N:
        ans = A[left]

    while left < N:
        while right + 1 < left + N and ans + A[right + 1] <= X:
            right += 1
            ans += A[right]
        
        answer = max(answer, ans)
        if left < right:
            ans -= A[left]
            left += 1
        else:
            left += 1
            right += 1
            while left < N and A[left] > X:
                left += 1
                right += 1
            if left < N:
                ans = A[left]
    
    print(answer)

                
                
            





if __name__ == "__main__":
    main()