标签:main return inf open class maker amp push pushd
LCT模板题;
话说xor和的意思是所有数xor一下;
#include<iostream> #include<cstdio> #include<cstring> #include<string> #include<cmath> #include<cstdlib> #include<ctime> #include<algorithm> using namespace std; #define mid ((l+r)>>1) #define LL long long #define FILE "dealing" #define up(i,j,n) for(LL i=(j);i<=(n);i++) #define pii pair<int,int> int read(){ int x=0,f=1,ch=getchar(); while(ch<‘0‘||ch>‘9‘){if(ch==‘-‘)f=-1;ch=getchar();} while(ch>=‘0‘&&ch<=‘9‘)x=(x<<1)+(x<<3)+ch-‘0‘,ch=getchar(); return f*x; } const int maxn=306000,inf=100000000,mod=998244353; int n,m,cnt; int c[maxn][2],fa[maxn],rev[maxn],w[maxn],v[maxn],sum[maxn]; void reve(int x){rev[x]^=1,swap(c[x][0],c[x][1]);} void updata(int x){sum[x]=sum[c[x][1]]^sum[c[x][0]]^v[x];} void pushdown(int x){if(rev[x])rev[x]^=1,reve(c[x][1]),reve(c[x][0]);} bool isroot(int x){return c[fa[x]][1]!=x&&c[fa[x]][0]!=x;} void rotate(int x){ int y=fa[x],z=fa[y],d=c[y][1]==x; if(!isroot(y))c[z][c[z][1]==y]=x; fa[y]=x,fa[x]=z,fa[c[x][d^1]]=y; c[y][d]=c[x][d^1],c[x][d^1]=y; updata(y);updata(x); } int q[maxn],top=0; void splay(int x){ q[++top]=x; for(int i=x;!isroot(i);i=fa[i])q[++top]=fa[i]; while(top)pushdown(q[top--]); while(!isroot(x)){ int y=fa[x],z=fa[y]; if(!isroot(y)) if(c[y][1]==x^c[z][1]==y)rotate(x); else rotate(y); rotate(x); } } void access(int x){for(int t=0;x;t=x,x=fa[x])splay(x),c[x][1]=t,updata(x);} void makeroot(int x){access(x);splay(x);reve(x);} void link(int x,int y){makeroot(x);fa[x]=y;} void cut(int x,int y){makeroot(x);access(y);splay(y);if(c[y][0]==x)fa[x]=c[y][0]=0;} int main(){ freopen(FILE".in","r",stdin); freopen(FILE".out","w",stdout); n=read(),m=read();cnt=n; up(i,1,n)sum[i]=v[i]=read(); int ch,x,y; while(m--){ ch=read(),x=read(),y=read(); if(ch==0){ makeroot(x),access(y),splay(y); printf("%d\n",sum[y]); } if(ch==1){ makeroot(x);access(y);splay(y); int t=y;while(c[t][0])t=c[t][0]; if(t!=x)link(x,y); } if(ch==2)cut(x,y); if(ch==3){makeroot(x);v[x]=y;updata(x);} } return 0; }
标签:main return inf open class maker amp push pushd
原文地址:http://www.cnblogs.com/chadinblog/p/6337541.html