35-Search Insert Position.py

'''
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
'''

# by myself
class Solution:
    def searchInsert(self, nums, target):
        lens = len(nums)
        for i in range(lens):
            if nums[i] >= target:
                return i
        return lens

# by myself
class Solution:
    def searchInsert(self, nums, target):
        """
        :type nums: List[int]
        :type target: int
        :rtype: int
        """
        if target in nums:
            return nums.index(target)
        elif target > nums[-1]:
            return len(nums)
        elif target < nums[0]:
            return 0
        else:
            for i in range(len(nums)-1):
                if target > nums[i] and target < nums[i+1]:
                    return i+1

# by others
class Solution(object):
    def searchInsert(self, nums, target):
        """
        :type nums: List[int]
        :type target: int
        :rtype: int
        """
        i = 0
        while nums[i] < target:
            i += 1
            if i == len(nums):
                return i
        return i