旅游

旅游

Time Limit: 1000ms
Memory Limit: 65536KB

64-bit integer IO format: %lld Java class name: Main SubmitStatute Statistics Discuss Next

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Tag it!

某L是一个旅游爱好者，并且伴有轻微强迫症。不管去什么地方旅游，他总是要走遍每一个景点，以求不留遗憾。

前段时间，他又去了一个名叫YNBHX的景区，这个景区非常特别，它一共有N个景点和N-1条小道，每条小道连接这N个景点中的某两个，并保证从景区内每一个景点都能通过若干条小道到达另一个景点。

由于景区人数微多，景区规定，每人每天可以选择任意一个景点出发到达另一个景点，但途中不能走回头路（即每一条小道在同一天之内只能经过一次），现在某L想知道，对于这个神奇的景区，他要想游览完所有的景区至少需要几天？=，=

Input

第一行一个整数N，表示共有N个景点。（N<=1000）

接下来N-1行，每行两个整数A、B，表示景点A和景点B之间有一条小道。

Output

一个整数K，表示某L要想游览完所有景点至少需要K天。

Sample Input

Sample Input1
3
1 2
2 3

Sample Input2
4
1 2
1 3
1 4

Sample Output

Sample Output1
1

Sample Output2
2
水题：只用判断无向图的度，度大于2的把大于2的部分加起来，最后ans=（sum+1）/2+1； <pre class="cpp" name="code">#include <stdio.h>
#include <string.h>
int in[2000]={0};
int main()
{
int n;
while(~scanf("%d",&n))
{
int x,y;
for(int i=1;i<n;i++)
{
scanf("%d%d",&x,&y);
in[x]++;in[y]++;
}
int ans=0;
for(int i=0;i<1001;i++)
{
if(in[i]>2)
{
ans+=(in[i]-2);
}
}
printf("%d\n",(ans+1)/2+1);
}
return 0;
}