Search Insert Position

Easy
Concept
Code
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Solution Guide: Search Insert Position

Approach

Run standard binary search. If the target is found, return its index. If the loop ends without a match, the left pointer has passed the right pointer and sits exactly at the position where the target should be inserted.

Complexity Analysis

Time
O(log n)
Space
O(1)

Pattern

Binary Search (Classic)

Why It Works

When the loop ends, left pointer sits at the exact position where the target should be inserted to maintain sorted order.

Updated Feb 2026