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
#include
#include
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('\n');
}

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:\n",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!\n");
                }
                else if(size[fax]>size[fay]){
                    printf("%d is winner!\n",yuanx);
                    fa[fay]=fax;
                    size[fax]+=size[fay];
                    tot--;
                }
                else if(size[fay]>size[fax]){
                    printf("%d is winner!\n",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('\n');
            */
        }
    }
}