Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
Home Page
Statistical Charts
Submit Problem
Online Status
Update your info
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
User ID:
欢迎参加hihoCoder挑战赛18,赢取BB-8机器人、Github Octocat和原版《The C++ Programming Language》!
Balancing the Scale
Time Limit: 1000MSMemory Limit: 65536K
Total Submissions: 1649Accepted: 634


You are given a strange scale (see the figure below), and you are wondering how to balance this scale. After several attempts, you have discovered the way to balance it — you need to put different numbers on different squares while satisfying the following two equations:

x1 * 4+x2 * 3+x3 * 2+x4=x5+x6 * 2+x7 * 3+x8 * 4
y1 * 4+y2 * 3+y3 * 2+y4=y5+y6 * 2+y7 * 3+y8 * 4

How many ways can you balance this strange scale with the given numbers?


There are multiple test cases in the input file. Each test case consists of 16 distinct numbers in the range [1, 1024] on one separate line. You are allowed to use each number only once.

A line with one single integer 0 indicates the end of input and should not be processed by your program.


For each test case, if it is possible to balance the scale in question, output one number, the number of different ways to balance this scale, in the format as indicated in the sample output. Rotations and reversals of the same arrangement should be counted only once.

Sample Input

87 33 98 83 67 97 44 72 91 78 46 49 64 59 85 88

Sample Output

Case 1: 15227223


[Submit]   [Go Back]   [Status]   [Discuss]

Home Page   Go Back  To top

All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator