题解 | #多组_二维数组_T组形式# Python

import sys

t = int(sys.stdin.readline().strip())


for _ in range(t):  
    n,m = map(int, sys.stdin.readline().strip().split())
    total_sum = 0
    for _ in range(n):
        
        total_sum += sum(list(map(int, sys.stdin.readline().strip().split())))
    print(total_sum)