题解 | #多组_二维数组_T组形式#

import sys
t = int(input())
for i in range(t):
    n,m = map(int,input().split())
    total_sum = 0
    for j in range(n):
        row = list(map(int,input().split()))
        total_sum += sum(row)
    print(total_sum)