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

B = A + A
S = sum(A)
import sys
if S <= X:
    print(S)
    exit()
l = 0
now = 0
r = 0
ans = 0
while l < N:
    while r < N + N and now + B[r] <= X:
        now += B[r]
        r += 1
    if now > ans:
        ans = now
    if r == l:
        l += 1
        r += 1
    else:
        now -= B[l]
        l += 1
print(ans)