摘要:
Invert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4 / \ 7 2 / \ / \9 6 3 1/** * Definition for a binary tree node... 阅读全文
posted @ 2015-06-12 17:59
卖程序的小歪
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摘要:
Implement the following operations of a stack using queues.push(x) -- Push element x onto stack.pop() -- Removes the element on top of the stack.top()... 阅读全文
posted @ 2015-06-12 17:47
卖程序的小歪
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