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prasad on Instagram: "Prefix Sum explained from scratch 🚀 Comment "PREFIX" 👇 I’ll share the full PDF notes. This post includes: ✔ Concept explanation ✔ LeetCode 303 (Range Sum Query) ✔ Java, Python & C++ solutions If you struggle with range sum problems, the issue is not coding — it’s repeated work. Prefix Sum helps you: • Preprocess once • Answer queries in O(1) • Think efficiently #PrefixSum #LeetCode303 #DSA #Arrays #JavaDSA #CodingInterview #DSABeginners"
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