【moban】LCT+自带splay模板

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#include
#include
#define zig(x) zigzag(x,1)
#define zag(x) zigzag(x,2)
using namespace std;
const int maxn = 200005;
int n,m,rev[maxn],ls[maxn],rs[maxn],fa[maxn],siz[maxn];
bool isroot(int x) { return ls[fa[x]]!=x&&rs[fa[x]]!=x; }
void putup(int x)
{
    siz[x]=siz[ls[x]]+siz[rs[x]]+1; 
}
void zigzag(int x,int knd)
{
    int y=fa[x],z=fa[y];
    if(!isroot(y))
    {
        if(ls[z]==y) ls[z]=x;
        else rs[z]=x;
    }
    fa[x]=z; fa[y]=x;
    if(knd==1) //右旋zig
    {
        ls[y]=rs[x];
        fa[ls[y]]=y;
        rs[x]=y;
    }
    else//左旋 zag
    {
        rs[y]=ls[x];
        fa[rs[y]]=y;
        ls[x]=y;
    }
    putup(y); putup(x);
}
void putdowm(int x)
{
    if(!rev[x]) return;
    swap(ls[x],rs[x]); rev[ls[x]]^=1; rev[rs[x]]^=1;
    rev[x]=0;
}
void putdowmall(int x)
{
    if(!isroot(x)) putdowmall(fa[x]);
    putdowm(x);
}
void splay(int x)
{
    putdowmall(x);
    while(!isroot(x))
    {
        int y=fa[x],z=fa[y];
        if(isroot(y))
        {
            if(ls[y]==x) zig(x);
            else zag(x);
        }
        else
        {
            if(ls[z]==y) 
            {
                if(ls[y]==x) zig(y),zig(x); 
                else zag(x),zig(x); 
            }
            else 
            {
                if(rs[y]==x) zag(y),zag(x);
                else zig(x),zag(x);
            }
        }
    }
}
void acc(int x)
{
    for(int y=0;x;y=x,x=fa[x])
    {
        splay(x);
        rs[x]=y;
        putup(x); 
    }
}
void setroot(int x)
{
    acc(x); splay(x); rev[x]^=1; 
}
void link(int a,int b)
{
    setroot(a); fa[a]=b;
}
void cut(int a,int b)
{
    setroot(a); acc(b); splay(b);
    ls[b]=fa[a]=0;
}
int getroot(int a)
{
    acc(a); splay(a);
    while(ls[a]) a=ls[a];
    return a;
}
int main()
{
}