# #77. A+B Problem

### 样例一

#### input

10
0 1 7 3 9 2
7 4 0 9 10 5
1 0 4 2 10 2
7 9 1 5 7 2
6 3 5 3 6 2
6 6 4 1 8 1
6 1 6 0 6 5
2 2 5 0 9 3
5 1 3 0 2 5
5 6 7 1 1 2



#### output

55



### 限制与约定

1$=5$$\leq 10$$\leq 10$$\leq 10 2=20$$\leq 40$$\leq 40$$\leq 40$
3$=20$$\leq 40$$\leq 40$$\leq 40 4=5000$$\leq 10$$\leq 200000$$\leq 100000$
5$=5000$$\leq 10$$\leq 200000$$\leq 300000 6=200$$\leq 10^9$$\leq 200000$$\leq 200000$
7$=300$$\leq 10^9$$\leq 200000$$\leq 220000 8=500$$\leq 10^9$$\leq 200000$$\leq 400000$
9$=5000$$\leq 5000$$\leq 200000$$\leq 150000 10=5000$$\leq 10^9$$\leq 200000$$\leq 300000$

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