CHAIN  Strange Food Chain
There are 3 kinds of animals A,B and C. A can eat B,B can eat C,C can eat A. It's interesting,isn't it?
Now we have n animals,numbered from 1 to n. Each of them is one of the 3 kinds of animals:A,B,C.
Today Mary tells us k pieces of information about these n animals. Each piece has one of the two forms below:
 1 x y: It tells us the kind of x and y are the same.
 2 x y: It tells us x can eat y.
Some of these k pieces are true,some are false. The piece is false if it satisfies one of the 3 conditions below, otherwise it's true.
 X or Y in this piece is larger than n.
 This piece tells us X can eat X.
 This piece conflicts to some true piece before.
Input
The first line contains a single integer t.t blocks follow.
To every block,the first line contains two integers n(1<=n<=50000) and k (1<=k<=100000). k lines follow,each contains 3 positive integers D(1<=D<=2),X,Y,separated by single spaces.
Output
t lines,each contains a single integer  the number of false pieces in the corresponding block.
Example
Sample input: 1 100 7 1 101 1 2 1 2 2 2 3 2 3 3 1 1 3 2 3 1 1 5 5 Sample output: 3 Hint:Warning: large Input/Output data, be careful with certain languagesThe false pieces are the 1st,the 4th and the 5th ones.
hide comments
daridius:
20190114 15:26:54
this is cool :) Last edit: 20190114 19:11:18 

ravi:
20160107 06:28:50
nice problem ):))


mkrjn99:
20150507 09:34:50
Best question on unionfind! 

Eric:
20140906 19:00:58
why the sentence 5 is false?? 

:D:
20100726 06:59:12
Difference between scanf and my fast reading is 0.6s on this problem, so a lot of time is wasted on input reading. Still, with the proper algorithm in C++ you should have no problem with AC. In my case it was 0.7s, where the actual algo took under 0.1s.


Przemys³aw Pietrzkiewicz:
20090629 20:56:18
IMHO time limit is too strict. 
Added by:  Fudan University Problem Setters 
Date:  20070331 
Time limit:  1s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: C99 ERL JSRHINO 
Resource:  Chinese National Olympiad in Informatics 2001,Day 1; translated by Blue Mary 