摘要：
Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the following unique perm... 阅读全文
posted @ 2016-01-13 09:09
Hygeia
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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 @ 2016-01-13 04:10
Hygeia
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There are a row ofnhouses, each house can be painted with one of thekcolors. The cost of painting each house with a certain color is different. You ha... 阅读全文
posted @ 2016-01-13 01:22
Hygeia
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There is a fence with n posts, each post can be painted with one of the k colors.You have to paint all the posts such that no more than two adjacent f... 阅读全文
posted @ 2016-01-13 00:43
Hygeia
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