poj 1079 Cube Stacking（并查集）

Cube Stacking

Description

Farmer John and Betsy are playing a game with N (1 moves and counts. 

* In a move operation, Farmer John asks Bessie to move the stack containing cube X on top of the stack containing cube Y. 

* In a count operation, Farmer John asks Bessie to count the number of cubes on the stack with cube X that are under the cube X and report that value. 

Write a program that can verify the results of the game. 

Input

* Line 1: A single integer, P 

* Lines 2..P+1: Each of these lines describes a legal operation. Line 2 describes the first operation, etc. Each line begins with a ‘M’ for a move operation or a ‘C’ for a count operation. For move operations, the line also contains two integers: X and Y.For count operations, the line also contains a single integer: X. 

Note that the value for N does not appear in the input file. No move operation will request a move a stack onto itself. 

Output

Print the output from each of the count operations in the same order as the input file. 

Sample Input

6
M 1 6
C 1
M 2 4
M 2 6
C 3
C 4

Sample Output

1
0
2

Source

USACO 2004 U S Open

思路：记录当前点集合的所有元素个数和当前点到根的距离，答案就是二者之差

#include
#include
using namespace std;
const int mm=100010;
class node
{
  public:int r,u,dis;
}g[mm];
int m;
void dataset()
{
  for(int i=0;i>m)
  { dataset();
    while(m--)
    {
      cin>>s>>a;
      if(s=='C')
      {
        b=look(a);cout>b;uni(a,b);}
    }
  }
}

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