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Codeforces 1323D Present Catherine received an array of integers as a gift for March 8. Eventually she grew bored with it, and she started calculated 阅读全文
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Codeforces 1323E Instant Noodles Wu got hungry after an intense training session, and came to a nearby store to buy his favourite instant noodles. Aft 阅读全文
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Codeforces 1312E Array Shrinking You are given an array $a_1, a_2, \dots, a_n$. You can perform the following operation any number of times: Choose a 阅读全文