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Yamanote Line | Aizu Online Judge

Introduction to Programming Introduction to Algorithms and Data Structures Library of Data Structures Library of Graph Algorithms Library of Computational Geometry Library of Dynamic Programming Library of Number Theory

Koto Distance | Aizu Online Judge

Introduction to Programming Introduction to Algorithms and Data Structures Library of Data Structures Library of Graph Algorithms Library of Computational Geometry Library of Dynamic Programming Library of Number Theory

The Last Ant

A straight tunnel without branches is crowded with busy ants coming and going. Some ants walk left to right and others right to left. All ants walk at a constant speed of 1 cm/s. When two ants meet, they try to pass each other.

Sightseeing Tour | Aizu Online Judge

Introduction to Programming Introduction to Algorithms and Data Structures Library of Data Structures Library of Graph Algorithms Library of Computational Geometry Library of Dynamic Programming Library of Number Theory

Butterfly

Claire is a man-eater. She's a real man-eater. She's going around with dozens of guys. She's dating all the time. And one day she found some conflicts in her date schedule. D'oh! So she needs to pick some dates and give the others up. The dates are set by hours like 13:00 to 15:00.

Whist

Whist is a game played by four players with a standard deck of playing cards. The players seat around a table, namely, in north, east, south, and west. This game is played in a team-play basis: the players seating opposite to each other become a team.

Shredding Company

You have just been put in charge of developing a new shredder for the Shredding Company. Although a ``normal'' shredder would just shred sheets of paper into little pieces so that the contents would become unreadable, this new shredder needs to have the following unusual basic characteristics.

Carpenters' Language

International Carpenters Professionals Company (ICPC) is a top construction company with a lot of expert carpenters. What makes ICPC a top company is their original language. The syntax of the language is simply given in CFG as follows: S -> SS | (S) | )S( | ε In other words, a right parenthesis can be closed by a left parenthesis and a left parenthesis can be closed by a right parenthesis in this language.

JAG-channel | Aizu Online Judge

Introduction to Programming Introduction to Algorithms and Data Structures Library of Data Structures Library of Graph Algorithms Library of Computational Geometry Library of Dynamic Programming Library of Number Theory

Ginkgo Numbers

We will define Ginkgo numbers and multiplication on Ginkgo numbers. A Ginkgo number is a pair where m and n are integers. For example, , and are Ginkgo numbers. A Ginkgo number is called a prime if m 2+ n 2 > 1 and it has exactly eight divisors.