N,X=map(int, input().split())
A=list(map(int, input().split()))
if min(A)>X:
  print(0)
  exit()
a=sum(A)
if a<=X:
  print(a)
  exit()
B=A+A
r=0;v=0;ans=0
for l in range(N):
  while v+B[r]<=X:
    v+=B[r]
    r+=1 
  ans=max(ans,v)
  v-=B[l]
print(ans)