题解 | 单组_二维数组
单组_二维数组
https://www.nowcoder.com/practice/4df606b6c3764d9c969f8759c8a4807b
import sys
n,m = sys.stdin.readline().split()
num_sum = 0
for _ in range(int(n)):
num_sum += sum(list(map(int,sys.stdin.readline().split())))
print(num_sum)