题解 | 单组_二维数组
a, b = map(int, input().split())
sum0 = 0
for i in range(a):
c = sum(list(map(int, input().split())))
sum0 += c
print(sum0)
a, b = map(int, input().split())
sum0 = 0
for i in range(a):
c = sum(list(map(int, input().split())))
sum0 += c
print(sum0)
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