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Two Sum II - Input Array Is Sorted
Two Sum II - Input Array Is Sorted rewards a clean two-pointer invariant instead of checking every combination. Interviewers love it because it reveals your invariant-driven scanning and your edge-case discipline. Keep the invariant in your head and the pointer moves become obvious.
Arrays & HashingTwo Pointers
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👨💼
Meet Allison & Tim
Your AI coaches
Practice coding interviews out loud with real-time voice coaching. Your code actually runs.
Free · No sign up · Early access
1Two Sum IImedium
2Part 2
3Part 3
Start Part 1 to unlock your next challenge
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