# 35. Search Insert Position

Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.

You may assume no duplicates in the array.

Example 1:

Input: [1,3,5,6], 5
Output: 2

Example 2:

Input: [1,3,5,6], 2
Output: 1

Example 3:

Input: [1,3,5,6], 7
Output: 4

Example 4:

Input: [1,3,5,6], 0
Output: 0

# Solution

Approach 1: Binary search.

# Code (Python)

Approach 1:

# Code (C++)

Approach 1:

class Solution {
public:
    int searchInsert(vector<int>& nums, int target) {
        int head = 0;
        int tail = nums.size() - 1;
        while (head <= tail)
        {
            int mid = head + (tail - head) / 2;
            if (nums[mid] == target)
                return mid;
            else if (nums[mid] < target)
                head = mid + 1;
            else
                tail = mid - 1;
        }
        return head;
    }
};