[BZOJ1455] 罗马游戏|左偏树

#include<bits/stdc++.h>
#define N 1000005
using namespace std;
int n,m,fa[N],l[N],r[N],d[N],v[N];
bool die[N];
char ch[10];
inline int read()
{
    int a=0,f=1; char c=getchar();
    while (c<‘0‘||c>‘9‘) {if (c==‘-‘) f=-1; c=getchar();}
    while (c>=‘0‘&&c<=‘9‘) {a=a*10+c-‘0‘; c=getchar();}
    return a*f;
}
int find(int x) {return fa[x]==x?x:fa[x]=find(fa[x]);}
int merge(int x,int y)
{
    if (!x) return y;
    if (!y) return x;
    if (v[x]>v[y]) swap(x,y);
    r[x]=merge(r[x],y);
    if (d[r[x]]>d[l[x]]) swap(l[x],r[x]);
    d[x]=d[r[x]]+1;
    return x;
}
int main()
{
    n=read();
    for (int i=1;i<=n;i++) v[i]=read(),fa[i]=i;
    m=read();
    d[0]=-1; 
    for (int i=1;i<=m;i++)
    {
        scanf("%s",ch); 
        if (ch[0]==‘M‘)
        {
            int x=read(),y=read();
            if (die[x]||die[y]) continue;
            int p=find(x),q=find(y);
            if (p!=q)
            {
                int t=merge(p,q);
                fa[p]=fa[q]=t;
            }
        }
        else
        {
            int x=read();
            if (die[x]) printf("0\n");
            else
            {
                int p=find(x); die[p]=1;
                printf("%d\n",v[p]);
                fa[p]=merge(l[p],r[p]);
                fa[fa[p]]=fa[p];
            }
        }
    }
    return 0;
}