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全部文章（共127篇）

B. File Name

You can not just take the file and send it. When Polycarp trying to send a file in the social network “Codehorses”, he encountered an unexpected probl...

2018-12-28

0 378

A. The Rank

读错题意，WA了四次… John Smith knows that his son, Thomas Smith, is among the best students in his class and even in his school. After the students of the sch...

2018-12-28

0 456

A. Tanya and Stairways

Little girl Tanya climbs the stairs inside a multi-storey building. Every time Tanya climbs a stairway, she starts counting steps from 11 to the numbe...

2018-12-28

0 451

A. Frog Jumping

A frog is currently at the point 00 on a coordinate axis OxOx. It jumps by the following algorithm: the first jump is aa units to the right, the secon...

2018-12-27

0 322

A. Points in Segments

You are given a set of nn segments on the axis OxOx, each segment has integer endpoints between 11 and mm inclusive. Segments may intersect, overlap o...

2018-12-27

0 968

A. Polycarp's Pockets

Polycarp has nn coins, the value of the ii-th coin is aiai. Polycarp wants to distribute all the coins between his pockets, but he cannot put two coin...

2018-12-27

0 453

A. Key races

水题，因为英文不好就变成要费劲思考的题了（思考样例分别怎么算的…) Two boys decided to compete in text typing on the site “Key races”. During the competition, they have to type a text...

2018-12-27

0 493

A. Adjacent Replacements

Mishka got an integer array aa of length nn as a birthday present (what a surprise!). Mishka doesn’t like this present and wants to change it somehow...

2018-12-27

0 354

A. One-dimensional Japanese Crossword

Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized a × b squares, and each square is color...

2018-12-27

0 399

A. Bachgold Problem

outputstandard output Bachgold problem is very easy to formulate. Given a positive integer n represent it as a sum of maximum possible number of prime...

2018-12-26

0 430