Gyani Kumari on Instagram: "Two-Sum Problem ke liye O(N^2) Solution ko bhul jao! 🛑 Interview mein selection chahiye toh nested loops chorro aur ye O(N) approach use karo! The Logic: 1️⃣ partner = target - curr_num calculate karo. 2️⃣ Check karo: Kya partner HashMap mein hai? Yes: ✅ Pair mil gaya! No: ❌ m[curr_num] = true mark karo aur aage badho. 💡 Pro Tip: Agar indices nahi sirf elements chahiye, toh unordered_set use karna aur bhi efficient hai! 🚀 Time: O(N) | Space: O(N) 📌 Save this for y