Add testcases of bulb-easy, bulb-hard#21
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iknoom wants to merge 1 commit intoall1m-algorithm-study:mainfrom
Open
Add testcases of `bulb-easy`, `bulb-hard`#21iknoom wants to merge 1 commit intoall1m-algorithm-study:mainfrom
iknoom wants to merge 1 commit intoall1m-algorithm-study:mainfrom
