2 shunfurh shunfurh 于 2017.11.15 00:08 提问

Flow

Problem Description

Sample Input
3
-1 2 2
2 -1 2
2 2 -1
3
-1 1 2
1 -1 2
2 2 -1

Sample Output
YES
-1 1 1
1 -1 1
1 1 -1
NO

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