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Modern cellular phones have a small chip, called a SIM card, that allows the phone to interface with the carrier's network. SIM cards also have a smal 阅读全文
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As a huge fan of the popular collectible card game Numinous Wilds: the Elven Reign Chronicles (NWERC), you have a large collection of cards which you 阅读全文
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Pay attention to the non-standard memory limit in this problem. In order to cut off efficient solutions from inefficient ones in this problem, the tim 阅读全文
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For some binary string ss (i.e. each character sisi is either '0' or '1'), all pairs of consecutive (adjacent) characters were written. In other words 阅读全文
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You are given an array aa of length nn consisting of zeros. You perform nn actions with this array: during the ii-th action, the following sequence of 阅读全文
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The map of Bertown can be represented as a set of nn intersections, numbered from 11 to nn and connected by mm one-way roads. It is possible to move a 阅读全文
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Dreamoon likes sequences very much. So he created a problem about the sequence that you can't find in OEIS: You are given two integers d,md,m, find th 阅读全文
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Writing light novels is the most important thing in Linova's life. Last night, Linova dreamed about a fantastic kingdom. She began to write a light no 阅读全文
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A permutation of length nn is an array p=[p1,p2,…,pn]p=[p1,p2,…,pn], which contains every integer from 11 to nn (inclusive) and, moreover, each number 阅读全文
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Xenia is a girl being born a noble. Due to the inflexibility and harshness of her family, Xenia has to find some ways to amuse herself. Recently Xenia 阅读全文