The circle line of the Berland subway has n stations. We know the distances between all pairs of neighboring stations:
d1 is
the distance between the 1-st and the 2-nd
station;
d2 is
the d...
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其他好文 时间：
2014-07-22 23:05:14
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302
>>> d1 = dict(a = 1, b = 2)>>> d2
= dict(b = 2, c = 3)>>> d1 & d2 # 字典不?支持该操作Traceback (most recent
call last): File "", line 1, in TypeError: unsupp....
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其他好文 时间：
2014-05-01 12:50:50
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341
