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615
Don't you know that at a school pupils' programming contest a new computer language has been being developed. We call it D++. Generally speaking it doesn't matter if you know about it or not. But to run programs written in D++ we need a new operating system. It should be rather powerful and complex. It should work fast and have a lot of possibilities. But all this should be done in future. And now you are to... No. You should not devise the name for the operating system. You are to write the fi ...
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782
… Los babilonios se entregaron al juego. El que no adquiría suertes era considerado un pusilánime, un apocado. Con el tiempo, ese desdén justificado se duplicó. Era despreciado el que no jugaba, pero también era despreciados los perdedores que abonaban la multa … Jorge Luis Borges, La lotería de Babilonia, Ficciones People of Babylon were devoted to chance games and one of the most popular was a special kind of roulette. Recently, some old Babylonian tablet ...
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544
Background Mr Somurolov, fabulous chess-gamer indeed, asserts that no one else but him can move knights from one position to another so fast. Can you beat him? The Problem Your task is to write a program to calculate the minimum number of moves needed for a knight to reach one point from another, so that you have the chance to be faster than Somurolov. For people not familiar with chess, the possible knight moves are shown in Figure 1. 输入描述 The input begins with the number n of scenarios ...
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534
Given a base b and two non-negative base b integers p and m, compute p mod m and print the result as a base b integer. p mod m is defined as the smallest non-negative integer k such that p = a*m + k for some integer a.输入描述 Input consists of a number of cases. Each case is represented by a line containing three unsigned integers. The first, b, is a decimal number between 2 and 10. The second, p, contains up to 1000 digits between 0 and b-1. The third, m, contains up to 9 digits between 0 and b-1. ...
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879
In the 25th century, civilization is struck by a series of calamities that eventually led mankind to build walled cities interconnected by tunnel bridges to facilitate transportation. Each walled city possesses a unique ore required to build and repair all infrastructure including the tunnels. This material which when combined with other ores from all others cities form an almost indestructible material called "oreon". Outside the walled cities are uncivilized barbarians armed with ...
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717
Actually, this problem is about alignment of N (1 Bessie looks up and notices that she is exactly lined up with Sara and Julie. She wonders how many groups of three aligned cows exist within the field. Given the locations of all the cows (no two cows occupy the same location), figure out all sets of three cows are exactly collinear. Keep track of the sets, sorting the cows in each set by their ID number, lowest first. Then sort the sets by the three ID numbers (lowest first), breaking ties ...
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692
Everything is flat in Flatland. The planets are round but they are flat, that is, they are discs in a plane. The centers of three planets in Flatland are given and their radii. Find the point in Flatland from which all three planets are visible at the same angle, that is, they appear to have the same size measured as angular diameter. Let's call such a point an isoobservation point. There can be at most two such points and we are interested in finding the one that gives the largest a ...
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894
The northern part of the Pyramid contains a very large and complicated labyrinth. The labyrinth is divided into square blocks, each of them either filled by rock, or free. There is also a little hook on the floor in the center of every free block. The ACM have found that two of the hooks must be connected by a rope that runs through the hooks in every block on the path between the connected ones. When the rope is fastened, a secret door opens. The problem is that we do not know which hooks to co ...
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779
Triangle War is a two-player game played on the following triangular grid: Two players, A and B, take turns filling in any dotted line connecting two dots, with A starting first. Once a line is filled, it cannot be filled again. If the line filled by a player completes one or more triangles, she owns the completed triangles and she is awarded another turn (i.e. the opponent skips a turn). The game ends after all dotted lines are filled in, and the player with the most triangles wins the game ...
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695
A small group of commandos has infiltrated deep into enemy territory. They have just accomplished their mission and now have to return to their rendezvous point. Of course they don’t want to get caught even if the mission is already over. Therefore they decide to take the route that will keep them as far away from any enemy base as possible. Being well prepared for the mission, they have a detailed map of the area which marks all (known) enemy bases, their current position and the re ...
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