LeetCode 2587 | Rearrange Array to Maximize Prefix Score | Greedy + Prefix Sum | C++

LeetCode 2587 — Rearrange Array to Maximize Prefix Score.
You can rearrange a given array in any order. The score is the
count of positive prefix sums. Return the maximum score achievable.
A clean problem combining greedy thinking with prefix sum logic.

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🔗 IMPORTANT LINKS

💻 GitHub (Solutions Repo) → https://github.com/hanumanraj07
🌐 Portfolio → https://hanumanrajpurohit.vercel.app
💼 LinkedIn → https://linkedin.com/in/hanumanraj07
🧩 Problem Link → https://leetcode.com/problems/rearrange-array-to-maximize-prefix-score/

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📌 WHAT IS THIS PROBLEM?

Rearrange the array to maximize the number of positive values
in its prefix sum array.

nums = [2,-1,0,1,-3,3,-3]
Rearranged → [2,3,1,-1,-3,0,-3]
Prefix → [2,5,6,5,2,2,-1]
Score → 6 (six positive prefix sums)

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🛠️ APPROACH COVERED

Method → Sort descending + Prefix Sum greedy pass
Language → C++
Time → O(n log n)
Space → O(1)

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🎯 WHAT YOU WILL LEARN

→ Why sorting in descending order maximizes prefix positivity
→ How to compute prefix sum in a single pass while counting
→ Why the prefix sum turns negative the moment we should stop
→ Using long long to avoid overflow on large inputs
→ Clean C++ implementation with dry run

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📬 CONNECT WITH ME

💼 LinkedIn → https://linkedin.com/in/hanumanraj07
🌐 Portfolio → https://hanumanrajpurohit.vercel.app
💻 GitHub → https://github.com/hanumanraj07

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Видео LeetCode 2587 | Rearrange Array to Maximize Prefix Score | Greedy + Prefix Sum | C++ канала Hanuman Singh Rajpurohit