摘要:
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. 阅读全文
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. 阅读全文
posted @ 2015-05-13 11:20
m_CHaN
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摘要:
You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? 阅读全文
You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? 阅读全文
posted @ 2015-05-13 11:06
m_CHaN
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