幼儿园战争

题面传送门

灵魂出窍并查集，修改后留一个空壳以确保家人们的团结

#include<cstdio>
#include<iostream>
#include<cstring>
using namespace std;

inline void input(int &x){
	int ans=0,f=1;
	char c=getchar();
	while(c>'9'||c<'0'){
		if(c=='-')f=-1;
		c=getchar();
	}
	while(c>='0'&&c<='9'){
		ans=(ans<<1)+(ans<<3)+(c-48);
		c=getchar();
	}
	x=ans*f;
}

inline void output(int x){
	if(x<0)x=-x,putchar('-');
	if(x>9)output(x/10);
	putchar(x%10+48);
}

inline void writeln(int x){
	output(x);
	putchar('
');
}

int n,m,fa[1000005],size[1000005],now[1000005],tot,cnt;

inline int getfa(int v){return fa[v]==v?v:fa[v]=getfa(fa[v]);}

int main(){
	int T;
	input(T);
	for(int emm=1;emm<=T;emm++){
		printf("Case #%d:
",emm);
		input(n);input(m);
		for(int i=1;i<=n;i++){
			fa[i]=i;
			size[i]=1;
			now[i]=i;
		}
		tot=n;cnt=n;
		for(int i=1;i<=m;i++){
			char s[10];
			scanf("%s",s);
			if(s[0]=='q'){
				writeln(tot);
			}
			else if(s[0]=='f'){
				int x,y,yuanx,yuany,fax,fay;
				input(yuanx);input(yuany);x=now[yuanx];y=now[yuany];
				fax=getfa(x);fay=getfa(y);
				if(fax==fay)continue;
				if(size[fax]==size[fay]){
					printf("Either is winner!
");
				}
				else if(size[fax]>size[fay]){
					printf("%d is winner!
",yuanx);
					fa[fay]=fax;
					size[fax]+=size[fay];
					tot--;
				}
				else if(size[fay]>size[fax]){
					printf("%d is winner!
",yuany);
					fa[fax]=fay;
					size[fay]+=size[fax];
					tot--;
				}
			}
			else if(s[0]=='t'){
				int x,y,yuanx,yuany,fax,fay;
				input(yuanx);input(yuany);x=now[yuanx];y=now[yuany];
				fax=getfa(x);fay=getfa(y);
				int next=++cnt;
				fa[next]=fax;
				size[fax]++;
				size[fay]--;
				if(size[fay]==0)tot--;
				now[yuany]=next;
			}
			else if(s[0]=='r'){
				int x,yuanx,fax;
				input(yuanx);x=now[yuanx];
				fax=getfa(x);
				if(size[fax]==1)continue;
				int next=++cnt;
				fa[next]=next;
				size[next]=1;
				size[fax]--;
				tot++;
				now[yuanx]=next;
			}
			/*
			putchar('a');
			for(int i=1;i<=n;i++){
				printf("%d,%d ",size[getfa(now[i])],getfa(now[i]));
			}
			putchar('
');
			*/
		}
	}
}