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可不可以加重边, 可不可以加自己到自己的边! 有没有人清楚啊! 题目又不说! 揣谜呀!例如:
加重边的情况:
0
/\\
o 0 o
\
o 应该输出: -1or 2
加自己到自己边的情况:
0
/\\
o 0 o 应该输出: -1 or 2
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