The Largest Generation (25)
时间限制 1000 ms 内存限制 65536 KB 代码长度限制 100 KB 判断程序 Standard (来自 小小)
题目描述
A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same generation. Your task is to find the generation with the largest population.
输入描述:
Each input file contains one test case. Each case starts with two positive integers N (<100) which is the total number of family members in the tree (and hence assume that all the members are numbered from 01 to N), and M ( < N ) which is the number of family members who have children. Then M lines follow, each contains the information of a family member in the following format:
ID K ID[1] ID[2] … ID[K]
where ID is a two-digit number representing a family member, K (>0) is the number of his/her children, followed by a sequence of two-digit ID’s of his/her children. For the sake of simplicity, let us fix the root ID to be 01. All the numbers in a line are separated by a space.
输出描述:
For each test case, print in one line the largest population number and the level of the corresponding generation. It is assumed that such a generation is unique, and the root level is defined to be 1.
输入例子:
23 13
21 1 23
01 4 03 02 04 05
03 3 06 07 08
06 2 12 13
13 1 21
08 2 15 16
02 2 09 10
11 2 19 20
17 1 22
05 1 11
07 1 14
09 1 17
10 1 18
输出例子:
9 4
#include <iostream>
#include <malloc.h>
#include <fstream>
using namespace std;
/*
题目大意:给出家族的所有人数目和有孩子的人的数目,并且把每个人进行编号,找出人最多的那一代一共多
少人并且输出该代是第几代。
构建数组family[child] = parent; 并自低向顶计算代数。
*/
int getLayer(int *family, int child)
{
int gen = 1;
//依次往上取值
while (family[child] != child)
{
child = family[child];
gen++;
}
return gen;
}
int main()
{
int n,m;
//ifstream fin("test.txt");
cin >> n >> m;
//孩子为下标,父母为值
int *family = (int *)malloc((n+1)*sizeof(int));
family[1] = 1; //赋值根节点
for (int i = 0; i < m; i++)
{
int parent, childNum;
cin >> parent >> childNum;
for (int j = 0; j < childNum; j++)
{
int child;
cin >> child;
family[child] = parent;
}
}
//计算某代多少人
int *layer = (int *)malloc((n + 1)*sizeof(int));
for (int i = 1; i <= n; i++)
layer[i] = 0;
for (int i = 1; i <= n; i++)
layer[getLayer(family, i)]++; //把得到的相应层次人数累加;
int maxPeople=1,p=1;
for (int i = 1; i <= n; i++)
{
if (layer[i] > maxPeople)
{
maxPeople = layer[i];
p = i;
}
}
cout << maxPeople << ' ' << p;
//getchar();
}