Problem
A football team will be standing in rows to have a photograph taken. The location of each player will be given by two integers x and y, where y gives the number of the row, and x gives the distance of the player from the left edge of the row. The x values will be all different.
In order to make the photo more interesting, you're going to make sure
players who are near each other have shirts of different colors. To do
this, you set the following rule:
For each player P:
More formally, if there is a player at (x1,y1) and (x2,y2), where x1<x2, then those two players must have different shirt colors if:
Find the minimum number of distinct shirt colors required so that this is possible.
Input
The first line of input contains a single integer T, the number of test cases. Each test case starts with a line that contains an integer N, the number of players, followed by N lines of the form
x yeach specifying the position of one player.
Output
For each test case, output
Case #X: cwhere X is the test case number, starting from 1, and c is the minimum number of colors required.
Limits
1 ≤ T ≤ 100
1 ≤ x ≤ 1000
The values of x will all be different.
Small dataset
1 ≤ y ≤ 15
1 ≤ N ≤ 100
Large dataset
1 ≤ y ≤ 30
1 ≤ N ≤ 1000
Sample
Input 
Output 
3

Case #1: 1
