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'''
给定一个排序数组和一个目标值,在数组中找到目标值,并返回其索引。如果目标值不存在于数组中,返回它将会被按顺序插入的位置。你可以假设数组中无重复元素。
示例 1输入[1,3,5,6], 5 输出2
示例 2输入[1,3,5,6], 2 输出1
示例 3输入[1,3,5,6], 7 输出4
示例 4输入[1,3,5,6], 0 输出0
'''
class Solution(object):
def searchInsert(self, nums, target): # 二分法
"""
:type nums: List[int]
:type target: int
:rtype: int
"""
lo = 0
hi = len(nums)
while lo < hi:
mid = lo + (hi - lo)/2 # 可以用右移1位代替mid=(left+right)>>1位移运算的效率更高
if nums[mid] > target:
hi = mid
elif nums[mid] < target:
lo = mid + 1
else:
return mid
return lo