Jump Game
Given an array where nums[i] = max jump length at position i Return true if you can reach the last index starting from index 0 Example: [2,3,1,1,4] => true (jump 1 step from 0 to 1, then 3 steps to last)
Jump Game is about turning repeated work into a reusable state instead of re-solving subproblems. Interviewers love it because it reveals your state-and-transition thinking and your edge-case discipline. Once you define the right state, the transitions usually write themselves.
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