Problem3447--【Div2】abc410d - XOR Shortest Walk

3447: 【Div2】abc410d - XOR Shortest Walk

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 1Submit Num: 1Statistics

Description




Sample Input Copy 

3 3
1 2 4
2 3 5
1 3 2

Sample Output Copy 

1

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如果无法完成，记得打印-1哟！

Source/Category

Div2 图论 BFS 位运算 
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