There are several colored cubes. All of them are of the same size but they may be colored differently. Each face of these cubes has a single color. Colors of distinct faces of a cube may or may not be

前两天编程之美，有个

Problem Description There are 3*N+2 nonnegative integers. Except two special integers, the rest 3*N integers can form N triple groups: { Vi, Vj, Vk| Vi=Vj=Vk}, each integer are at most in one triple

Combinatorics is a branch of mathematics chiefly concerned with counting discrete objects. For instance, how many ways can you pick two people out of a crowd of n people? Into how many regions can yo

Room and Moor Time Limit: 12000/6000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others) Total Submission(s): 276    Accepted Submission(s): 79 Problem Description PM Room defines

Problem Description Once upon a time Matt went to a small town. The town was so small and narrow that he can regard the town as a pivot. There were some skyscrapers in the town, each located at posit

Suffix reconstruction Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 253    Accepted Submission(s): 142 Problem Description Given a t