随笔分类 - codeforces
摘要：Mahmoud wrote a message s of length n. He wants to send it as a birthday present to his friend Moaz who likes strings. He wrote it on a magical paper
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摘要：Mahmoud has n line segments, the i-th of them has length ai. Ehab challenged him to use exactly 3 line segments to form a non-degenerate triangle. Mah
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摘要：While Mahmoud and Ehab were practicing for IOI, they found a problem which name was Longest common subsequence. They solved it, and then Ehab challeng
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摘要：All our characters have hobbies. The same is true for Fedor. He enjoys shopping in the neighboring supermarket. The goods in the supermarket have uniq
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摘要：Ilya is an experienced player in tic-tac-toe on the 4 × 4 field. He always starts and plays with Xs. He played a lot of games today with his friend Ar
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摘要：One spring day on his way to university Lesha found an array A. Lesha likes to split arrays into several parts. This time Lesha decided to split the a
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摘要：Moriarty has trapped n people in n distinct rooms in a hotel. Some rooms are locked, others are unlocked. But, there is a condition that the people in
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摘要：Molly Hooper has n different kinds of chemicals arranged in a line. Each of the chemicals has an affection value, The i-th of them has affection value
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摘要：Sherlock has a new girlfriend (so unlike him!). Valentine's day is coming and he wants to gift her some jewelry. He bought n pieces of jewelry. The i-
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摘要：Our beloved detective, Sherlock is currently trying to catch a serial killer who kills a person each day. Using his powers of deduction, he came to kn
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摘要：There are n people taking part in auction today. The rules of auction are classical. There were n bids made, though it's not guaranteed they were from
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摘要：There are n employees in Alternative Cake Manufacturing (ACM). They are now voting on some very important question and the leading world media are try
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摘要：Long time ago Alex created an interesting problem about parallelogram. The input data for this problem contained four integer points on the Cartesian
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摘要：Bachgold problem is very easy to formulate. Given a positive integer n represent it as a sum of maximum possible number of prime numbers. One can prov
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摘要：Vova again tries to play some computer card game. The rules of deck creation in this game are simple. Vova is given an existing deck of n cards and a
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摘要：Alice and Bob got very bored during a long car trip so they decided to play a game. From the window they can see cars of different colors running past
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摘要：There are n students who have taken part in an olympiad. Now it's time to award the students. Some of them will receive diplomas, some wiil get certif
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摘要：Description Heidi's friend Jenny is asking Heidi to deliver an important letter to one of their common friends. Since Jenny is Irish, Heidi thinks tha
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摘要：Description The marmots have prepared a very easy problem for this year's HC2 – this one. It involves numbers n, k and a sequence of n positive intege
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摘要：Description Your search for Heidi is over – you finally found her at a library, dressed up as a human. In fact, she has spent so much time there that
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