摘要：
You are given a line of nn colored squares in a row, numbered from 11 to nn from left to right. The ii-th square initially has the color cici. Let's s 阅读全文
posted @ 2019-08-16 09:40
black_hole6
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摘要：
The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. Given any two nodes in a bin 阅读全文
posted @ 2019-08-16 09:28
black_hole6
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