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[Java] How to use Lombok now

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Introduction There were lots of build errors when I imported the source for a project. There are many errors where XXXBuilder does not exist. Looking at bui...

[Ruby] AtCoder ABC127 D hash solved with Ruby 2.7.1

2 minute read

Introduction The environment of past problems of AtCoder has been upgraded. This time AtCoder Beginner Contest D-Integer Cards Difficulty: 891