Buggy python submission (verdict: Time Limit Exceeded):
def solve(a, b):
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            for bi in b:
                vb = v + st(k, bi)
                kb = k & (65535 ^ bi) | ai
                try:
                    ndp[kb] = max(ndp[kb], vb)
                except KeyError:
                    ndp[kb] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

def st(i, j):
    return bin(i).count('1') - bin(i & (65535 ^ j)).count('1')

import sys
f = sys.stdin

while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Fixed submission:
bitcount = [bin(i).count('1') for i in range(0x10000)]
def solve(a, b):
    global bitcount
    b = [65535 ^ bi for bi in b]
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            v += bitcount[k]
            for bi in b:
                bi &= k
                vb = v - bitcount[bi]
                bi |= ai
                try:
                    if ndp[bi] < vb:
                        ndp[bi] = vb
                except KeyError:
                    ndp[bi] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

import sys
f = sys.stdin


while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Buggy python submission (verdict: Runtime Error):
def solve(a, b):
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            for bi in b:
                vb = v + st(k, bi)
                kb = k & (65535 ^ bi) | ai
                try:
                    ndp[kb] = max(ndp[kb], vb)
                except KeyError:
                    ndp[kb] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

@memoize
def st(i, j):
    return bin(i).count('1') - bin(i & (65535 ^ j)).count('1')

def memoize(f):
    cache = {}
    def helper(x, y):
        if (x, y) not in cache:
            cache[(x, y)] = f(x, y)
        return cache[(x, y)]
    return helper

import sys
f = sys.stdin

while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Fixed submission:
bitcount = [bin(i).count('1') for i in range(0x10000)]
def solve(a, b):
    global bitcount
    b = [65535 ^ bi for bi in b]
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            v += bitcount[k]
            for bi in b:
                bi &= k
                vb = v - bitcount[bi]
                bi |= ai
                try:
                    if ndp[bi] < vb:
                        ndp[bi] = vb
                except KeyError:
                    ndp[bi] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

import sys
f = sys.stdin


while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Buggy python submission (verdict: Time Limit Exceeded):
def solve(a, b):
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            for bi in b:
                vb = v + st(k, bi)
                kb = k & (65535 ^ bi) | ai
                try:
                    ndp[kb] = max(ndp[kb], vb)
                except KeyError:
                    ndp[kb] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

def memoize(f):
    cache = {}
    def helper(x, y):
        if (x, y) not in cache:
            cache[(x, y)] = f(x, y)
        return cache[(x, y)]
    return helper

@memoize
def st(i, j):
    return bin(i).count('1') - bin(i & (65535 ^ j)).count('1')



import sys
f = sys.stdin

while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Fixed submission:
bitcount = [bin(i).count('1') for i in range(0x10000)]
def solve(a, b):
    global bitcount
    b = [65535 ^ bi for bi in b]
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            v += bitcount[k]
            for bi in b:
                bi &= k
                vb = v - bitcount[bi]
                bi |= ai
                try:
                    if ndp[bi] < vb:
                        ndp[bi] = vb
                except KeyError:
                    ndp[bi] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

import sys
f = sys.stdin


while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Buggy python submission (verdict: Time Limit Exceeded):
def solve(a, b):
    b = [65535 ^ bi for bi in b]
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            v += bin(k).count('1')
            for bi in b:
                bi &= k
                vb = v - bin(bi).count('1')
                bi |= ai
                try:
                    ndp[bi] = max(ndp[bi], vb)
                except KeyError:
                    ndp[bi] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

import sys
f = sys.stdin

while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Fixed submission:
bitcount = [bin(i).count('1') for i in range(0x10000)]
def solve(a, b):
    global bitcount
    b = [65535 ^ bi for bi in b]
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            v += bitcount[k]
            for bi in b:
                bi &= k
                vb = v - bitcount[bi]
                bi |= ai
                try:
                    if ndp[bi] < vb:
                        ndp[bi] = vb
                except KeyError:
                    ndp[bi] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

import sys
f = sys.stdin


while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Buggy python submission (verdict: Time Limit Exceeded):
bitcount = [bin(i).count('1') for i in range(0x10000)]

def solve(a, b):
    global bitcount
    b = [65535 ^ bi for bi in b]
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            v += bitcount[k]
            for bi in b:
                bi &= k
                vb = v - bitcount[bi]
                bi |= ai
                try:
                    ndp[bi] = max(ndp[bi], vb)
                except KeyError:
                    ndp[bi] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

import sys
f = sys.stdin

while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))

Fixed submission:
bitcount = [bin(i).count('1') for i in range(0x10000)]
def solve(a, b):
    global bitcount
    b = [65535 ^ bi for bi in b]
    pdp = {a[0]:0}
    ndp = {}
    for ai in a[1:] + [0]:
        for k, v in pdp.items():
            v += bitcount[k]
            for bi in b:
                bi &= k
                vb = v - bitcount[bi]
                bi |= ai
                try:
                    if ndp[bi] < vb:
                        ndp[bi] = vb
                except KeyError:
                    ndp[bi] = vb
        pdp, ndp = ndp, {}
        
    return max(pdp.values())

import sys
f = sys.stdin


while True:
    n, c = map(int, f.readline().split())
    if n == c == 0:
        break
    a = [int(''.join(f.readline().split()), 2) for i in range(n)]
    b = [int(''.join(f.readline().split()), 2) for i in range(c)]
    print(solve(a, b))