摘要：
A magic index in an array A[0...n-1] is defined to be an index such that A[i] = i. Given a sorted array of distinct integers, write a method to find a 阅读全文
posted @ 2016-12-08 12:16
Phoebe815
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Imagine a robot sitting on the upper left corner of grid with r rows and c columns. The robot can only move in two directions, right and down, but cer 阅读全文
posted @ 2016-12-08 10:39
Phoebe815
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A child is running up a staircase with n steps and can hop either 1 step, 2 steps, or 3 steps at a time. Implement a method to count how many possible 阅读全文
posted @ 2016-12-08 06:32
Phoebe815
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