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Problem 3218. -- a + b Problem

3218: a + b Problem

Time Limit: 20 Sec  Memory Limit: 40 MB
Submit: 2550  Solved: 964
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Description

Input

Output

Sample 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

Sample Output

55

HINT

Source

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