Please help me with this problem, i dont know what to do, can i have a hint?↵
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This is the Problem:↵
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[https://lqdoj.edu.vn/problem/pvhoi4vi](https://www.youtube.com/watch?v=dQw4w9WgXcQ)↵
This problem is in vietnamese, so pls translate to english, you dont need to sign up↵
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This is the Problem:↵
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This problem is in vietnamese, so pls translate to english, you dont need to sign up↵
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