【gcj】2012 round 3 待填坑
解答
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代码
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题目
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Problem A. Perfect Game
Note: If you fail to complete a level, you do not personally die—only your character in the game dies. If that were not the case, only a few people would try to earn this achievement.
Input
The first line of the input gives the number of test cases, T. T test cases follow, each of which consists of three lines. The first line of each test case contains a single integer N, the number of levels. The second line contains N space-separated integers Li. Li is the number of seconds level i lasts, which is independent of whether you complete the level or die. The third line contains N space-separated integers Pi. Pi is the percent chance that you will die in any given attempt to complete level i.
Output
For each test case, output one line containing "Case #x: ", where x is the case number (starting from 1), followed by N space-separated integers. The jth integer in the list should be the index of the jth level you should attempt to beat in order to minimize the amount of time you expect to spend earning the achievement.
Indices go from 0 to N-1. If there are multiple orderings that would give the same expected time, output the lexicographically least ordering. Out of two orderings, the lexicographically smaller one is the one with the smaller index at the first location where they differ; out of many orderings, the lexicographically least one is the one that is lexicographically smaller than every other ordering.
Limits
1 ≤ T ≤ 100.
0 ≤ Pi < 100.
Small dataset
1 ≤ N ≤ 20.
Li = 1.
Large dataset
1 ≤ N ≤ 1000.
1 ≤ Li ≤ 100.
Sample
Problem B. Havannah
In the game of Havannah, each hexagon can be occupied by at most one stone. Stones once put on the board are never removed or moved. The goal of the game is to build from stones a connected set of stones of one of three kinds. The winning structures are:
- A ring that encircles one or more empty hexagons. That is, at least one of the inner hexagons must be empty. More specifically, there is an empty hexagon that is separated from the outermost boundary of the board by hexagons with stones.Note that this rule is different from the official game Havannah.
- A bridge that connects any two corners of the board.
- A fork that connects any three of the board's six edges. Corners do not count as part of either adjacent edge.
This picture shows examples of winning structures:
Your program should determine whether a sequence of moves of a single player builds a winning structure. If so, it should output the name of the structure and the number of the move that completed it. If a move completes multiple rings, connects more than two corners, or connects more than three edges, the structure is still considered a ring, a bridge, or a fork, respectively. But if a move completes structures of different kinds at once, your program should output the names of all of them. We are only interested in the first winning move: ignore all moves following the winning one. If there is no winning structure on the board after playing all the moves from the sequence, your program should output none.
Input
The first line of input gives the number of test cases, T. T test cases follow. The first line of each test case contains two integers S and M, the number of hexagons on each side of the board and the number of moves in the sequence, respectively. The next M lines provide the sequence of moves, in order, where each line contains a space-separated pair (x, y) of hexagon identifiers. All the moves in the sequence lie on the board of size S. In each test case, the board is initially empty and the moves do not repeat.
Output
For each test case, output one line containing "Case #n: " followed by one of:
nonebridge in movekfork in movekring in movekbridge-fork in movekbridge-ring in movekfork-ring in movekbridge-fork-ring in movek
The cases are numbered starting from 1. The moves are numbered starting from 1.
Limits
Small dataset
1 ≤ T ≤ 200
2 ≤ S ≤ 50
0 ≤ M ≤ 100
Large dataset
1 ≤ T ≤ 20
2 ≤ S ≤ 3000
0 ≤ M ≤ 10000
Sample
Problem C. Quality Food
Fortunately, the largest restaurant in your hometown provides a food delivery service. You can purchase any amount of food in one delivery. There is a constant delivery fee for every delivery, regardless of the amount of food purchased in the delivery.
This restaurant serves different types of food. Each type of food has two properties: a price-per-meal, and a time-to-stale. One "meal" of food will feed you for one day; once a meal has been eaten, it cannot be eaten again. The time-to-stale of a type of food is the maximum number of days for which that food can still be eaten, counting from when you received it. A time-to-stale of zero means you must eat that type of food on the day of delivery.
In a single delivery you can purchase as many different types of food, and as many meals of each of those types, as you have money for. Note that if a particular type of food has a time-to-stale of t, it doesn't make any sense to order more than t+1 meals of that food in one delivery: at least one meal would go stale before you could eat it.
This restaurant has a very fast delivery service, so you will receive all the food in a delivery on the same day that you purchased it, and you may eat some of the food on the same day. Food delivery is the only way for you to receive quality food.
Given an amount of money, which you can spend on meal prices and delivery fees, what is the maximum number of days for which you can eat quality food every day?
Input
The first line of input gives the number of test cases, T. T test cases follow. Each test case will begin with three integers, M, F and N, denoting the amount of money you have, the delivery fee, and the number of types of food provided by the restaurant, respectively.N lines follow, each will consist of two integers, Pi and Si, denoting respectively the price-per-meal and time-to-stale of one type of food.
Output
For each test case, output one line containing "Case #x: y", where x is the case number (starting from 1) and y is the maximum number of days that you can keep eating at least one meal of quality food everyday.
Limits
1 ≤ T ≤ 50.
1 ≤ F ≤ M.
1 ≤ N ≤ 200.
1 ≤ Pi ≤ M.
Small dataset
0 ≤ Si ≤ 2,000,000.
1 ≤ M ≤ 2,000,000.
Large dataset
0 ≤ Si ≤ 1018.
1 ≤ M ≤ 1018.
Sample
An example scenario for the first case is by purchasing one meal of the first type and one meal of the second type during your first day in the city (costing a total of 20). Eat the first type of food that day, and eat the second type the next day. During your third day, purchase one meal of the first type and eat it on the same day. This accounts for three days.
Problem D. Lost Password
Ashish has forgotten his password. He remembers that he used the following algorithm to create his password: Ashish took up to k consecutive words from a passage of text, and took the first letter from each word. Then, he might have changed some of the letters to their "l33tspeak" equivalents. Specifically, he might have changed "o" to "0", "i" to "1", "e" to "3", "a" to "4", "s" to "5", "t" to "7", "b" to "8" and/or "g" to "9".
For example, if Ashish took his password from the first sentence of The Fellowship of the Ring -- "This book is largely concerned with Hobbits, and from its pages a reader may discover much of their character and a little of their history" -- Ashish would have reduced that to "tbilcwhafiparmdmotcaaloth". Then the password might be "tbilcwh", "7b1lcwh4f", "a", "4", or "4al07h", etc.
Ashish has a special extension installed in his browser that will prevent his computer from uploading any string that contains his password. In order to figure out which passage of text he took his password from, Ashish has created a webpage to take advantage of this extension. Every second, the webpage will tell the browser to post a "password string" for a new passage of text: a string that contains all of the possible passwords that Ashish could have chosen from that passage of text. As soon as his browser fails to post such a string, Ashish will know where he took his password from.
For example, if k = 2 and the passage of text contains words starting with the letters "google", then one password string for that passage is "goo0og00gle9o909l3". All substrings of length ≤ 2 from the original string, and all of their l33tspeak equivalents, are contained in the new string.
Given the first letters of the words in a passage of text, what is the minimum number of characters in the "password string" of that passage?
Input
The first line of the input gives the number of test cases, T. T test cases follow. Each test case consists of two lines. The first line contains the integer k. The second line contains a string S, representing the first letters of the words in a passage of text. Scontains only the characters 'a' - 'z', with no spaces.
Output
For each test case, output one line containing "Case #x: y", where x is the case number (starting from 1) and y is the minimum number of characters in the password string for S.
Limits
1 ≤ T ≤ 20.
S will contain at least 2 * k characters.
There will exist a password string with at most 1018 characters.
Small dataset
S will contain at most 1000 characters.
k = 2.
Large dataset
S will contain at most 5000 characters.
2 ≤ k ≤ 500.
Sample
In the first sample input, one possible password string is "0ppop0".
In the second sample input, one possible password string is "goo0og00gle9o909l3".