Buggy python submission (verdict: Time Limit Exceeded):
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     su=0
     for j in range(i,n):
          su+=a[j]
          s.add(su)
s=list(s)
x=0
for i in range(40):
     x_=x+2**(39-i)
     cnt=0
     for a in s:
          if x_&a==x_:
               cnt+=1
     if cnt>=k:
          x=x_
print(x)

Fixed submission:
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     su=0
     for j in range(i,n):
          su+=a[j]
          s.add(su)
s=list(s)
x=0
for i in range(40):
     x_=x+2**(39-i)
     cnt=0
     for a in s:
          if x_&a==x_:
               cnt+=1
     if cnt>=k:
          x=x_
print(x)

Buggy python submission (verdict: Time Limit Exceeded):
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     for j in range(i,n):
          s.add(sum(a[i:j+1]))
s=list(s)
x=0
for i in range(40):
     x_=x+2**(39-i)
     cnt=0
     for a in s:
          if x_&a==x_:
               cnt+=1
     if cnt>=k:
          x=x_
print(x)

Fixed submission:
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     su=0
     for j in range(i,n):
          su+=a[j]
          s.add(su)
s=list(s)
x=0
for i in range(40):
     x_=x+2**(39-i)
     cnt=0
     for a in s:
          if x_&a==x_:
               cnt+=1
     if cnt>=k:
          x=x_
print(x)

Buggy python submission (verdict: Time Limit Exceeded):
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     for j in range(i,n):
          s.add(bin(sum(a[i:j+1]))[2:].zfill(40))
s=list(s)
d={i:set() for i in range(40)}
for i in range(len(s)):
     for j in range(40):
          if s[i][39-j]=='1':
               d[j].add(i)
f=True
for i in range(40):
     s_=d[39-i]
     if len(s_)>=k:
          if f:
               se=s_
               f=False
          else:
               if len(se&s_)>k:
                    se&=s_
               elif len(se&s_)==k:
                    se&=s_
                    break
se=list(se)
ans=int(s[se[0]],base=2)
for i in range(1,k):
     ans&=int(s[se[i]],base=2)
print(ans)

Fixed submission:
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     su=0
     for j in range(i,n):
          su+=a[j]
          s.add(su)
s=list(s)
x=0
for i in range(40):
     x_=x+2**(39-i)
     cnt=0
     for a in s:
          if x_&a==x_:
               cnt+=1
     if cnt>=k:
          x=x_
print(x)

Buggy python submission (verdict: Time Limit Exceeded):
from itertools import combinations
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     for j in range(i,n):
          s.add(sum(a[i:j+1]))
x=combinations(s,k)
m=0
for x_ in x:
     p=x_[0]
     for x__ in x_:
          p&=x__
     m=max(m,p)
print(m)

Fixed submission:
n,k=map(int,input().split())
a=list(map(int,input().split()))
s=set()
for i in range(n):
     su=0
     for j in range(i,n):
          su+=a[j]
          s.add(su)
s=list(s)
x=0
for i in range(40):
     x_=x+2**(39-i)
     cnt=0
     for a in s:
          if x_&a==x_:
               cnt+=1
     if cnt>=k:
          x=x_
print(x)