Description
Professor Hopper is researching the sexual behavior of a rare species of bugs. He assumes that they feature two different genders and that they only interact with bugs of the opposite gender. In his experiment, individual bugs and their interactions were easy to identify, because numbers were printed on their backs.
Problem
Given a list of bug interactions, decide whether the experiment supports his assumption of two genders with no homosexual bugs or if it contains some bug interactions that falsify it.
Input
Output
Sample Input
2
3 3
1 2
2 3
1 3
4 2
1 2
3 4
Sample Output
Scenario #1:
Suspicious bugs found!
Scenario #2:
No suspicious bugs found!
Hint
废话不说上主题
解题思路:
1.这个题用并查集;
2.这个题有个坑点,回车坑;
3.给par数组开两个种类(加上个转移量),利用same比较每次输入的虫子是否是同性(同组) 如果搅基,利用变量记录;
4.我能开火车了,污,污。。。。
代码:
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<cctype>
#include<list>
#include<iostream>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<vector>
using namespace std;
int par[100020];
int rank[100000];
void init(int x)//初始化
{
for(int i = 0; i < x; i++)
{
par[i] = i;
rank[i] = 0;
}
}
int find(int x)//查找根节点
{
if(par[x] == x) return x;
else
return par[x] = find(par[x]);
}
void unite(int x, int y)//合并
{
x = find(x);
y = find(y);
if(x == y) return ;
if(rank[x] < rank[y])
par[x] = y;
else{
par[y] = x;
if(rank[x] == rank[y]) rank[x]++;
}
}
bool same(int x, int y)//判断x, y是否是一组
{
return par[x] == par[y];
}
int main()
{
int n;
scanf("%d",&n);
for(int k = 0; k < n;k++)
{
int a,b,c,d;
scanf("%d%d",&a,&b);
init(2 * a);
int txt = true;//记录变量
for(int i = 0; i < b;i++)
{
scanf("%d%d",&c,&d);
if(same(c,d))//判断是否是一组(同性)其实还有same(c + a,d + a)自己想去吧
{
txt = false;
}
unite(c, d + a);//两个虫子异性合并
unite(c + a,d);//同上
}
if(k) printf("\n");//不加这肯定TE
if(!txt) printf("Scenario #%d:\nSuspicious bugs found!\n",k + 1);
if(txt) printf("Scenario #%d:\nNo suspicious bugs found!\n",k + 1);
}
return 0;
}
队友版本:
#include <iostream>
#include<algorithm>
#include<cstdio>
#include<cmath>
#include<cstring>
#include<cstdlib>
#include<stack>
#include<queue>
using namespace std;
int n,k;
int parent[1000000];
int find(int a)
{
if(a!=parent[a])
return parent[a]=find(parent[a]);
else
return parent[a];
}
void unite(int a,int b)
{
a=find(a);
b=find(b);
parent[b]=a;
}
int main()
{
int t,i,x,y,sum=1;
scanf("%d",&t);
while(t--)
{
scanf("%d%d",&n,&k);
for(i=1;i<=n*2;i++)
{
parent[i]=i;
}
int ans=0;
for(i=0;i<k;i++)
{
scanf("%d%d",&x,&y);
if(find(x)==find(y))
{
ans=1;
}
else
{
unite(x,y+n);
unite(x+n,y);
}
}
printf("Scenario #%d:\n",sum++);
if(ans==1)
printf("Suspicious bugs found!\n");
else
printf("No suspicious bugs found!\n");
if (t>0)
printf("\n");
}
return 0;
}