# Packages
*
* @time: 2019-08-19 21:47
* @author: louis
*/.
# Functions
BinarySearch 从小到大的int数组a里面,.
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二分法查询phone数据.
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GetBit get bit in byte.
LowerBound 在从小到大的数组里面.
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解法3: 将数组遍历,存入map,key值为原数组索引,原数组索引存入value值,如果能从map里面取出要找的数,说明存在,复杂度为o(n).
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# Variables
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# Structs
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