LeetCode Weekly Contest 72是LeetCode举办的第七十六场正式周赛，共4道题目，比赛时长1.5小时。
比赛链接：https://leetcode.com/contest/leetcode-weekly-contest-72/
题解列表：
LeetCode 784. Letter Case Permutation
LeetCode 785. Is Graph Bipartite?
归档 2018年2月
LeetCode Weekly Contest 72解题报告
[LeetCode]K-th Smallest Prime Fraction
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LeetCode.
题目描述：
LeetCode 786. K-th Smallest Prime Fraction
A sorted list A contains 1, plus some number of primes. Then, for every p < q in the list, we consider the fraction p/q.
What is the K-th smallest ...
[LeetCode]Cheapest Flights Within K Stops
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LeetCode.
题目描述：
LeetCode 787. Cheapest Flights Within K Stops
There are n cities connected by m flights. Each fight starts from city u and arrives at v with a price w.
Now given all the cities and fights, together with starting ...
[LeetCode]Is Graph Bipartite?
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LeetCode.
题目描述：
LeetCode 785. Is Graph Bipartite?
Given a graph, return true if and only if it is bipartite.
Recall that a graph is bipartite if we can split it's set of nodes into two independent subsets A and B such that ...
[LeetCode]Letter Case Permutation
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LeetCode.
题目描述：
LeetCode 784. Letter Case Permutation
Given a string S, we can transform every letter individually to be lowercase or uppercase to create another string. Return a list of all possible strings we could create.
Examples: Input: S = "a1b2" Output ...