HKICC | Homehkicc.ust.hk/public/files/past_competition/Octopus.pdf · was required to be...
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HKICC | Homehkicc.ust.hk/public/files/past_competition/Octopus.pdf · was required to be easy-to-use and fast, fulfilling transactions within 0.3 seconds without having to swipe,