Work

Problem Description

It’s an interesting experience to move from ICPC to work, end my college life and start a brand new journey in company.
As is known to all, every stuff in a company has a title, everyone except the boss has a direct leader, and all the relationship forms a tree. If A’s title is higher than B(A is the direct or indirect leader of B), we call it A manages B.
Now, give you the relation of a company, can you calculate how many people manage k people. 

 

Input

There are multiple test cases.
Each test case begins with two integers n and k, n indicates the number of stuff of the company.
Each of the following n-1 lines has two integers A and B, means A is the direct leader of B.

1 <= n <= 100 , 0 <= k < n
1 <= A, B <= n

 

Output

For each test case, output the answer as described above.

 

Sample Input

7 2 1 2 1 3 2 4 2 5 3 6 3 7

 

Sample Output

2

一个公司管理关系 父节点管理子节点以及子节点的子节点 以此类推 问管理k人数的人有几个

#include<stdio.h>jjjjjjjjjjjjjjjj
#include<cstring>
int pre[1001];
int erzi[10014];
void find(int p)
{
	while(p!=pre[p])
	{
		 p=pre[p];
		 erzi[p]++;
	} 
}
int main()
{
	int n,a,b,m;
	while(scanf("%d%d",&n,&m)!=EOF)
	{
		for(int i=1;i<=n;i++)
		{
			pre[i]=i;
			erzi[i]=0;
		}
		int k=n-1;
		while(k--) 
		{
			scanf("%d%d",&a,&b);
		    pre[b]=a;
		}
		int sum=0;
		for(int i=1;i<=n;i++)
		{
			find(i);
		}
	   for(int i=1;i<=n;i++)
	   {
		if(erzi[i]==m)
		sum++;
	   }
			printf("%d
",sum);
	}
	return 0;
}

Problem Description

It’s an interesting experience to move from ICPC to work, end my college life and start a brand new journey in company.
As is known to all, every stuff in a company has a title, everyone except the boss has a direct leader, and all the relationship forms a tree. If A’s title is higher than B(A is the direct or indirect leader of B), we call it A manages B.
Now, give you the relation of a company, can you calculate how many people manage k people. 

 

Input

There are multiple test cases.
Each test case begins with two integers n and k, n indicates the number of stuff of the company.
Each of the following n-1 lines has two integers A and B, means A is the direct leader of B.

1 <= n <= 100 , 0 <= k < n
1 <= A, B <= n

 

Output

For each test case, output the answer as described above.

 

Sample Input

7 2 1 2 1 3 2 4 2 5 3 6 3 7

 

Sample Output

2