Day 1 – LeetCode Learning Log

Sep 5, 2025 · 2 min read · 🚀 Building Blocks I Practiced Today Frequency Map Using Hash Map Map<Integer, Integer> hm = new HashMap<>(); for(int num : nums){ hm.put(num, hm.getOrDefault((num, 0) + 1); } Frequency Map Using Arrays int[] freq = new int[26]; for(c...