题解 | 小苯的迷宫行走

import sys

def solve():
    data = sys.stdin.read().split()
    ptr = 0
    T = int(data[ptr])
    ptr += 1
    for _ in range(T):
        output = []
        n = int(data[ptr])
        m = int(data[ptr+1])
        ptr += 2
        ans = 0
        for _ in range(n*m):
            ans |= int(data[ptr])
            ptr += 1
        print(ans)

solve()