All Categories - Halfstack

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leetcode hard

1359. Count All Valid Pickup and Delivery Options

1326. Minimum Number of Taps to Open to Water a Garden

2366. Minimum Replacements to Sort the Array

403. Frog Jump

68. Text Justification

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leetcode medium

2707. Extra Characters in a String

lib

c++ lib or usage, which I hardly used but seen

travel

2023.9.14～2023.9.17 Tokyo, Japan