import io
import sys
from collections import defaultdict, deque, Counter
from itertools import permutations, combinations, accumulate
from heapq import heappush, heappop
from bisect import bisect_right, bisect_left
from math import gcd
import math

_INPUT = """\
6
5 11
4 5 7 3 3
6 70000
108686 107161 117224 117236 78936 112374
10 100
17 32 47 68 11 18 83 37 91 78
"""

def input():
  return sys.stdin.readline()[:-1]

def solve(test):
  N,X=map(int,input().split())
  A=list(map(int,input().split()))
  if sum(A)<=X:
    print(sum(A))
  else:
    B=A+A
    now=0
    score=0
    ans=0
    for i in range(N):
      while score<=X:
        score+=B[now]
        now+=1
      ans=max(ans,score-B[now-1])
      score-=A[i]
    print(ans)

def random_input():
  from random import randint,shuffle
  N=randint(1,10)
  M=randint(1,N)
  A=list(range(1,M+1))+[randint(1,M) for _ in range(N-M)]
  shuffle(A)
  return (" ".join(map(str, [N,M]))+"\n"+" ".join(map(str, A))+"\n")*3

def simple_solve():
  return []

def main(test):
  if test==0:
    solve(0)
  elif test==1:
    sys.stdin = io.StringIO(_INPUT)
    case_no=int(input())
    for _ in range(case_no):
      solve(0)
  else:
    for i in range(1000):
      sys.stdin = io.StringIO(random_input())
      x=solve(1)
      y=simple_solve()
      if x!=y:
        print(i,x,y)
        print(*[line for line in sys.stdin],sep='')
        break

#0:提出用、1:与えられたテスト用、2:ストレステスト用
main(0)