随笔分类 - OJ Codefroces
摘要：Since Sonya has just learned the basics of matrices, she decided to play with them a little bit. Sonya imagined a new type of matrices that she called
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摘要：A. Remove Duplicates A. Remove Duplicates Petya has an array aconsisting of nintegers. He wants to remove duplicate (equal) elements.Petya wants to le
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摘要：You are given a sequence a1, a2, ..., an of one-dimensional segments numbered 1 through n. Your task is to find two distinct indices i and j such that
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摘要：You might have heard about the next game in Lara Croft series coming out this year. You also might have watched its trailer. Though you definitely mis
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摘要：Arkady is playing Battleship. The rules of this game aren't really important.There is a field of n×n cells. There should be exactly one k-decker on th
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摘要：You are given a tree (a graph with n vertices and n - 1 edges in which it's possible to reach any vertex from any other vertex using only its edges).
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摘要：http://codeforces.com/problemset/problem/963/A 不考虑正负的话，每两项之间之间公比为b/a,考虑正负，则把k段作为循环节，循环节育循环节之间公比为(b/a)^k,在把第一个k小节整体看作第一项，等比数列求和。 #include <iostream> #i
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摘要：B. Ordering Pizza It's another Start[c]up finals, and that means there is pizza to order for the onsite contestants. There are only 2 types of pizza (
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摘要：C. Mahmoud and Ehab and the xor Mahmoud and Ehab are on the third stage of their adventures now. As you know, Dr. Evil likes sets. This time he won't
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摘要：Mahmoud and Ehab and the bipartiteness Mahmoud and Ehab continue their adventures! As everybody in the evil land knows, Dr. Evil likes bipartite graph
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摘要：A. Arpa and a research in Mexican wave Arpa is researching the Mexican wave. There are n spectators in the stadium, labeled from 1 to n. They start th
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摘要：A. Odds and Ends time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Where do odds begin, and
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摘要：A. Sorting by Subsequences You are given a sequence a1, a2, ..., an consisting of different integers. It is required to split this sequence into the m
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摘要：Shortest Path Problem? Shortest Path Problem? You are given an undirected graph with weighted edges. The length of some path between two vertices is t
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摘要：A. Chess Tourney time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A. Chess Tourney time li
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摘要：A. Generous Kefa time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One day Kefa found n ba
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摘要：D. Round Subset time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Let's call the roundness
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摘要：B. Flag of Berland time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output The flag of Berland is
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摘要：C. Two Seals time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output One very important person ha
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摘要：A. Key races time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Two boys decided to compete
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