LeetCode Pattern: 19 Tips & Strategies for Solving Binary Search Problems (Including 10 Classic Problems & Solutions)

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Binary search is a commonly used algorithm for solving various problems on LeetCode. It’s a powerful and efficient technique that exploits the properties of sorted data.

I. TIPS & STRATEGIES FOR SOLVING BINARY SEARCH PROBLEMS:

1. Understand the Problem:

• Clearly understand the problem statement and what needs to be achieved with binary search. Identify the constraints and requirements.

1.1. Indicator of Binary Search Problems:

i. Sorted Input:

• Look for problems where the input is sorted (either in ascending or descending order). Binary search is most applicable in sorted data.

ii. Searching for a Target:

• Problems that involve searching for a specific target value or finding an element in a sorted array often require binary search.

iii. Find the First or Last Occurrence:

• If the problem asks you to find the first or last occurrence of a target value in a sorted array, binary search is a common approach.