随笔分类 - OJ-codeforces
摘要：A. Wrong Subtraction A. Wrong Subtraction Little girl Tanya is learning how to decrease a number by one, but she does it wrong with a number consistin
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摘要：A. Plant Dwarfs have planted a very interesting plant, which is a triangle directed "upwards". This plant has an amusing feature. After one year a tri
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摘要：A. Fafa and his Company Fafa owns a company that works on huge projects. There are n employees in Fafa's company. Whenever the company has a new proje
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摘要：A. Love Triangle A. Love Triangle As you could know there are no male planes nor female planes. However, each plane on Earth likes some other plane. T
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摘要：D. Buy a Ticket Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will v
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摘要：A. Word Correction Victor tries to write his own text editor, with word correction included. However, the rules of word correction are really strange.
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摘要：B. Levko and Array standard output B. Levko and Array standard output Levko has an array that consists of integers: a1, a2, ... , an. But he doesn’t l
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摘要：A. Palindromic Supersequence You are given a string A. Find a string B, where B is a palindrome and A is a subsequence of B. A subsequence of a string
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摘要：A. Splits Let's define a split of n as a nonincreasing sequence of positive integers, the sum of which is n. For example, the following sequences are
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摘要：Pushok the dog has been chasing Imp for a few hours already. Fortunately, Imp knows that Pushok is afraid of a robot vacuum cleaner. While moving, the
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摘要：A. Cloning Toys Recently, he found a machine that can clone plush toys. Imp knows that if he applies the machine to an original toy, he additionally g
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摘要：A. Water The Garden A. Water The Garden It is winter now, and Max decided it's about time he watered the garden. The garden can be represented as n co
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摘要：You are given a graph with n nodes and m directed edges. One lowercase letter is assigned to each node. We define a path's value as the number of the
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摘要：A. Supermarket We often go to supermarkets to buy some fruits or vegetables, and on the tag there prints the price for a kilo. But in some supermarket
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摘要：C. The Monster C. The Monster As Will is stuck in the Upside Down, he can still communicate with his mom, Joyce, through the Christmas lights (he can
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摘要：A. Eleven Eleven wants to choose a new name for herself. As a bunch of geeks, her friends suggested an algorithm to choose a name for her. Eleven want
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摘要：D. Too Easy Problems D. Too Easy Problems You are preparing for an exam on scheduling theory. The exam will last for exactly T milliseconds and will c
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摘要：A. Modular Exponentiation The following problem is well-known: given integers n and m, calculate , where 2n = 2·2·...·2 (n factors), and denotes the r
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摘要：A. The Way to Home A frog lives on the axis Ox and needs to reach home which is in the point n. She starts from the point 1. The frog can jump to the
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摘要：A. Visiting a Friend A. Visiting a Friend Pig is visiting a friend. Pig's house is located at point 0, and his friend's house is located at point m on
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