Word Break
Given a string s and a dictionary of words Return true if s can be segmented into dictionary words The same word may be reused multiple times Example: s = "leetcode", wordDict = ["leet","code"] => true
Word Break is a dynamic programming question: define the state cleanly and the transitions usually follow. Interviewers love it because it reveals your state-and-transition thinking and your edge-case discipline. The trap is picking a state that's too vague; keep it minimal and consistent.
Meet Coco
Coco is an AI study partner, not a person. She listens while you explain your code, asks what a line does and never hands you the fix. Typing with Coco is free when you sign in, up to a daily limit. Talking with her out loud comes with the $79 pack. Anyone can open the editor and run their code.
Each locked part opens in the editor once the part before it passes.