“I'm stuck on LeetCode #121 (Best Time to Buy and Sell Stock). Can you help me understand what patterns I should look for?”
“Can you explain how the sliding window technique works? I'm trying to solve LeetCode #3.”
“For LeetCode #200 (Number of Islands), I'm thinking of using DFS. Is this a good approach?”
“What's the time complexity of using a HashMap for LeetCode #1 (Two Sum)? Can it be improved?”