Binary Search on Answer Pattern – Must Solve LeetCode Problems

Binary Search on Answer Pattern (Complete Practice Guide)

Binary Search on Answer is a powerful problem-solving pattern frequently used in coding interviews and competitive programming. Instead of searching inside an array, we perform binary search on the range of possible answers.

• Minimum or maximum value is asked
• Answer lies within a numeric range
• A feasibility function exists
• Feasibility is monotonic

📌 LeetCode Problems Using Binary Search on Answer

Problem	Difficulty	Core Idea
1283 – Find the Smallest Divisor Given a Threshold	Easy	Binary search on divisor value
1011 – Capacity To Ship Packages Within D Days	Medium	Binary search on ship capacity
875 – Koko Eating Bananas	Medium	Binary search on eating speed
1482 – Minimum Number of Days to Make m Bouquets	Medium	Binary search on number of days
1760 – Minimum Limit of Balls in a Bag	Medium	Binary search on max balls per bag
410 – Split Array Largest Sum	Hard	Binary search on maximum subarray sum
1552 – Magnetic Force Between Two Balls	Medium	Binary search on minimum distance
1891 – Cutting Ribbons	Medium	Binary search on ribbon length

🎯 Final Takeaway

Mastering Binary Search on Answer turns many complex-looking problems into predictable templates. Once you identify the range and feasibility check, the solution becomes straightforward.