【LOJ #2346】「JOI 2016 Final」断层（线段树）

传送门

把坐标$(x,y) ightarrow(x-y,x+y)$
后发现就是往下和右移$2l$长度

对于$x,y$分别维护一颗线段树
线段树上二分开始移的位置区间加即可

#include<bits/stdc++.h>
using namespace std;
#define re register
#define cs const
#define pb push_back
#define ll long long
#define pii pair<int,int>
#define fi first
#define se second
#define bg begin
#define poly vector<int>
cs int RLEN=1<<20|1;
inline char gc(){
	static char ibuf[RLEN],*ib,*ob;
	(ib==ob)&&(ob=(ib=ibuf)+fread(ibuf,1,RLEN,stdin));
	return ib==ob?EOF:*ib++;
}
inline int read(){
	char ch=gc();
	int res=0;bool f=1;
	while(!isdigit(ch))f^=ch=='-',ch=gc();
	while(isdigit(ch))res=(res+(res<<2)<<1)+(ch^48),ch=gc();
	return f?res:-res;
}
template<class tp>inline void chemx(tp &a,tp b){a<b?a=b:0;}
template<class tp>inline void chemn(tp &a,tp b){a>b?a=b:0;}
cs int N=200005;
ll ansx[N],ansy[N];
namespace tx{
	#define lc (u<<1)
	#define rc ((u<<1)|1)
	#define mid ((l+r)>>1)
	ll mx[N<<2],tag[N<<2];
	inline void pushup(int u){
		mx[u]=min(mx[lc],mx[rc]);
	}
	inline void pushnow(int u,ll k){
		mx[u]+=k,tag[u]+=k;
	}
	inline void pushdown(int u){
		if(!tag[u])return;
		pushnow(lc,tag[u]),pushnow(rc,tag[u]);
		tag[u]=0;
	}
	void build(int u,int l,int r){
		if(l==r){mx[u]=l;return;}
		build(lc,l,mid),build(rc,mid+1,r);
		pushup(u);
	}
	void get(int u,int l,int r){
		if(l==r){ansx[l]=mx[u];return;}
		pushdown(u),get(lc,l,mid),get(rc,mid+1,r);
	}
	void update(int u,int l,int r,int st,int des,ll k){
		if(st<=l&&r<=des)return pushnow(u,k);
		pushdown(u);
		if(st<=mid)update(lc,l,mid,st,des,k);
		if(mid<des)update(rc,mid+1,r,st,des,k);
		pushup(u);
	}
	int find(int u,int l,int r,int x){
		if(l==r)return l;
		pushdown(u);
		if(mx[u]>x)return 0;
		if(mx[rc]<=x)return find(rc,mid+1,r,x);
		return find(lc,l,mid,x);
	}
}
namespace ty{
	ll mx[N<<2],tag[N<<2];
	inline void pushup(int u){
		mx[u]=min(mx[lc],mx[rc]);
	}
	inline void pushnow(int u,ll k){
		mx[u]+=k,tag[u]+=k;
	}
	inline void pushdown(int u){
		if(!tag[u])return;
		pushnow(lc,tag[u]),pushnow(rc,tag[u]);
		tag[u]=0;
	}
	void build(int u,int l,int r){
		if(l==r){mx[u]=l;return;}
		build(lc,l,mid),build(rc,mid+1,r);
		pushup(u);
	}
	void get(int u,int l,int r){
		if(l==r){ansy[l]=mx[u];return;}
		pushdown(u),get(lc,l,mid),get(rc,mid+1,r);
	}
	void update(int u,int l,int r,int st,int des,ll k){
		if(st<=l&&r<=des)return pushnow(u,k);
		pushdown(u);
		if(st<=mid)update(lc,l,mid,st,des,k);
		if(mid<des)update(rc,mid+1,r,st,des,k);
		pushup(u);
	}
	int find(int u,int l,int r,int x){
		if(l==r)return l;
		pushdown(u);
		if(mx[u]>x)return 0;
		if(mx[rc]>x)return find(lc,l,mid,x);
		return find(rc,mid+1,r,x);
	}
	#undef lc
	#undef rc
	#undef mid
}
int n,q;
int X[N],D[N],L[N];
int main(){
	#ifdef Stargazer
	freopen("lx.cpp","r",stdin);
	#endif
	n=read(),q=read();
	for(int i=1;i<=q;i++)X[i]=read(),D[i]=read(),L[i]=read();
	tx::build(1,1,n),ty::build(1,1,n);
	for(int i=q;i;i--){
		int x=X[i],d=D[i],l=L[i];
		if(d==1){
			int pos=tx::find(1,1,n,x);
			if(pos)ty::update(1,1,n,1,pos,-2*l);
		}
		else{
			int pos=ty::find(1,1,n,x)+1;
			if(pos<=n)tx::update(1,1,n,pos,n,2*l);
		}
	}
	tx::get(1,1,n),ty::get(1,1,n);
	for(int i=1;i<=n;i++)cout<<(ansx[i]-ansy[i])/2<<'
';
}