# しゃくとり法 N, X = map(int, input().split()) A = list(map(int, input().split())) AA = A+A if X>=sum(A): print(sum(A)) exit() right = 0 left = 0 ans = 0 SUM = 0 while left < N and right < N*2: while right < left+N: if SUM+AA[right] <= X: SUM += AA[right] ans = max(ans, SUM) right += 1 else: break SUM -= AA[left] left += 1 if left >= right: right = left SUM = 0 #print('left', left, 'right', right, 'product', product, 'ans', ans) print(ans)