题解 | 单组_二维数组

import sys

lines = [line.strip() for line in sys.stdin.readlines() if line.strip()]
ptr = 0
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)