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codeforces

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全部文章 / codeforces （共130篇）

C. Perfect Keyboard

链接：https://codeforces.ml/contest/1303/problem/C Polycarp wants to assemble his own keyboard. Layouts with multiple rows are too complicated for him —...

2020-09-15

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C. Ayoub's function

链接：https://codeforces.ml/contest/1301/problem/C Ayoub thinks that he is a very smart person, so he created a function f(s)f(s), where ss is a binary ...

2020-09-15

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C. Air Conditioner

链接：https://codeforces.com/contest/1304/problem/C Gildong owns a bulgogi restaurant. The restaurant has a lot of customers, so many of them like to ma...

2020-09-15

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B. Hyperset

链接：https://codeforces.com/contest/1287/problem/B Bees Alice and Alesya gave beekeeper Polina famous card game "Set" as a Christmas present....

2020-09-15

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B. New Year and Ascent Sequence

链接：https://codeforces.com/contest/1284/problem/B A sequence a=[a1,a2,…,al]a=[a1,a2,…,al] of length ll has an ascent if there exists a pair of indices...

2020-09-15

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C. New Year and Permutation

链接：https://codeforces.ml/contest/1284/problem/C Recall that the permutation is an array consisting of nn distinct integers from 11 to nn in arbitrary...

2020-09-15

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C. Basketball Exercise

链接：https://codeforces.com/contest/1195/problem/C Finally, a basketball court has been opened in SIS, so Demid has decided to hold a basketball exerci...

2020-09-15

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C2. Exam in BerSU (hard version)

链接：https://codeforces.ml/contest/1185/problem/C2 The only difference between easy and hard versions is constraints. If you write a solution in Pytho...

2020-09-15

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D1. Add on a Tree

链接：https://codeforces.ml/contest/1189/problem/D1 Note that this is the first problem of the two similar problems. You can hack this problem only if y...

2020-09-15

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C. Restoring Permutation

链接：https://codeforces.ml/contest/1315/problem/C You are given a sequence b1,b2,…,bnb1,b2,…,bn. Find the lexicographically minimal permutation a1,a2,…...

2020-09-15

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