Buggy python submission (verdict: Runtime Error):
N,K = map(int,input().split())
A = list(map(int,input().split()))
L = []
for i in range(N):
    for j in range(1,N+1):
        if i > j - 1:
            continue
        else:
            l = A[i:j]
            L.append(sum(l))
L.sort()
border = 2 ** (len(str(bin(L[-K]))[2:]) - 1)
L = [e for e in L if e >= border]
def combinationListRecursive(data, r):
  if r == 0 or r > len(data):
    return []

  result = []
  _combinationListRecursive(data, r, 0, [], result)
  return result


def _combinationListRecursive(data, r, start, progress, result):
  if r == 0:
    result.append(progress)
    return

  for i in range(start, len(data)):
    _combinationListRecursive(data, r - 1, i + 1, progress + [data[i]], result)

result = combinationListRecursive(L,K)
ans_list = []
for list_c in result:
    for e in list_c:
        if e == list_c[0]:
            copy = e
            continue
        AND = copy & e
        if e == list_c[-1]:
            ans = AND
            ans_list.append(ans)
            break
        copy = AND
print(max(ans_list))

Fixed submission:
def debug():
    import itertools
    N,K = map(int,input().split())
    a = list(map(int,input().split()))
    beauty = []
    for i in range(N):
        for j in range(i+1,N+1):
            part = a[i:j]
            beauty.append(sum(part))
    choise = [e for e in itertools.combinations(beauty,K)]
    ans = 0
    for pair in choise:
        res = pair[0]
        for i in range(1,len(pair)):
            res = res & pair[i]
        if res > ans :
            ans = res
            adopt = pair
    print(ans)
    print(pair)
    print(sorted(beauty))

def main():
    N,K = map(int,input().split())
    a = list(map(int,input().split()))
    degit = sum(a).bit_length()
    beaty = []
    manage = [[] for i in range(degit)]
    for i in range(N):
        for j in range(i+1,N+1):
            part_sum = sum(a[i:j])
            manage[part_sum.bit_length()-1].append(part_sum)
    
    candidate = []
    for i in range(degit-1,-1,-1):
        if len(manage[i]) >= K:
            candidate = manage[i]
            note = i
            break

    for i in range(note,-1,-1):
        final = []
        judge = pow(2,i)
        for e in candidate:
            if judge == judge & e:
                final.append(e)
        if len(final) == K:
            break
        elif len(final) > K:
            candidate = final
        if i == 0:
            final = candidate[:K]

    ans = final[0]
    for i in range(1,K):
        ans = ans & final[i]
    print(ans)    
main()

Buggy python submission (verdict: Runtime Error):
N,K = map(int,input().split())
A = list(map(int,input().split()))
L = []
for i in range(N):
    for j in range(1,N+1):
        if i > j - 1:
            continue
        else:
            l = A[i:j]
            L.append(sum(l))
L = list(set(L))
def combinationListRecursive(data, r):
  if r == 0 or r > len(data):
    return []

  result = []
  _combinationListRecursive(data, r, 0, [], result)
  return result


def _combinationListRecursive(data, r, start, progress, result):
  if r == 0:
    result.append(progress)
    return

  for i in range(start, len(data)):
    _combinationListRecursive(data, r - 1, i + 1, progress + [data[i]], result)
result = combinationListRecursive(L,K)
ans_list = []
for list_c in result:
    for e in list_c:
        if e == list_c[0]:
            copy = e
            continue
        AND = copy & e
        if e == list_c[-1]:
            ans = AND
            ans_list.append(ans)
            break
        copy = AND
print(max(ans_list))

Fixed submission:
def debug():
    import itertools
    N,K = map(int,input().split())
    a = list(map(int,input().split()))
    beauty = []
    for i in range(N):
        for j in range(i+1,N+1):
            part = a[i:j]
            beauty.append(sum(part))
    choise = [e for e in itertools.combinations(beauty,K)]
    ans = 0
    for pair in choise:
        res = pair[0]
        for i in range(1,len(pair)):
            res = res & pair[i]
        if res > ans :
            ans = res
            adopt = pair
    print(ans)
    print(pair)
    print(sorted(beauty))

def main():
    N,K = map(int,input().split())
    a = list(map(int,input().split()))
    degit = sum(a).bit_length()
    beaty = []
    manage = [[] for i in range(degit)]
    for i in range(N):
        for j in range(i+1,N+1):
            part_sum = sum(a[i:j])
            manage[part_sum.bit_length()-1].append(part_sum)
    
    candidate = []
    for i in range(degit-1,-1,-1):
        if len(manage[i]) >= K:
            candidate = manage[i]
            note = i
            break

    for i in range(note,-1,-1):
        final = []
        judge = pow(2,i)
        for e in candidate:
            if judge == judge & e:
                final.append(e)
        if len(final) == K:
            break
        elif len(final) > K:
            candidate = final
        if i == 0:
            final = candidate[:K]

    ans = final[0]
    for i in range(1,K):
        ans = ans & final[i]
    print(ans)    
main()