题解 | 多组_二维数组_T组形式

import sys

lines = [line.strip() for line in sys.stdin.readlines() if line.strip()]
ptr = 0
t = int(lines[ptr])
ptr += 1
for _ in range(t):
    n, m = map(int, lines[ptr].split())
    ptr += 1
    ans = 0
    for _ in range(n):
        nums = map(int, lines[ptr].split())
        ptr += 1
        ans += sum(nums)
    print(ans)