MSE06H  Japan
English  Vietnamese 
Japan plans to welcome the ACM ICPC World Finals and a lot of roads must be built for the venue. Japan is tall island with N cities on the East coast and M cities on the West coast (M ≤ 1000, N ≤ 1000). K superhighways will be build. Cities on each coast are numbered 1, 2, ... from North to South. Each superhighway is straight line and connects city on the East coast with city of the West coast.
The funding for the construction is guaranteed by ACM. A major portion of the sum is determined by the number of crossings between superhighways. At most two superhighways cross at one location. Write a program that calculates the number of the crossings between superhighways.
Input
The input file starts with T  the number of test cases. Each test case starts with three numbers – N, M, K. Each of the next K lines contains two numbers – the numbers of cities connected by the superhighway. The first one is the number of the city on the East coast and second one is the number of the city of the West coast.
Output
For each test case write one line on the standard output:
Test case "case number": "number of crossings"
Sample
Input: 1 3 4 4 1 4 2 3 3 2 3 1 Output: Test case 1: 5
hide comments
luka_:
20191129 20:36:54
I don't think that Japan has only 7 cities. 

mohanish2504:
20190614 15:56:58
I followed inversion count approach from GEEKSFORGEEKS with BIT it didnt work can someone explain why?


sarwar__05:
20180913 01:06:09
Adjacency List (sorted) + Segment Tree ( point update + range sum ) :D 

pentatonix:
20180701 14:06:18
Vector Of Pair : TLE


vaibhav2303:
20180613 08:42:06
Store the answer in long long int. 

karthik1997:
20180105 08:17:01
Fast I/O + sort + 1D BIT (0.06s )


shiv2111:
20180103 07:35:52
Printing "Test Case" cause 10 WA 

br4in1:
20171115 12:07:46
simple dp 

sfialok98:
20170605 21:58:36
Solved Using 2D BIT...


flyingduchman_:
20170328 18:26:24
Java tle, c++ ac 
Added by:  ~!(*(@*!@^& 
Date:  20090416 
Time limit:  0.209s1s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: ERL JSRHINO NODEJS PERL6 VB.NET 
Resource:  Southeastern European 2006 