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SegmentTree3.cpp
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151 lines (134 loc) · 2.96 KB
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#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (100000007)
#define MAXN (100000)
typedef long long ll;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return (a-b+(a-b)/F*F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
class SegmentTree
{
ll a[MAXN*4],minv[MAXN*4],sumv[MAXN*4],maxv[MAXN*4],addv[MAXN*4],setv[MAXN*4];
int n;
public:
SegmentTree(){MEM(a) MEM(minv) }
SegmentTree(int _n):n(_n){MEM(a) MEM(minv) }
void mem(int _n)
{
n=_n;
MEMI(a) MEMI(minv)
}
void maintain(int o,int L,int R)
{
if (L<R) //只考虑左右子树
{
sumv[o]=sumv[Lson]+sumv[Rson];
minv[o]=min(minv[Lson],minv[Rson]);
maxv[o]=max(maxv[Lson],maxv[Rson]);
} //只考虑add操作
minv[o]+=addv[o];maxv[o]+=addv[o];sumv[o]+=addv[o]*(R-L+1);
}
int y1,y2,v;
void update(int o,int L,int R)
{
if (y1<=L&&R<=y2) {
addv[o]+=v;
}
else{
int M=(R+L)>>1;
if (y1<=M) update(Lson,L,M);
if (M< y2) update(Rson,M+1,R);
}
maintain(o,L,R);
}
void update2(int o,int L,int R)
{
if (y1<=L&&R<=y2) {
setv[o]=v;
}
else{
pushdown(o);
int M=(R+L)>>1;
if (y1<=M) update(Lson,L,M); else maintain(Lson,L,M); //维护pushodown,再次maintain
if (M< y2) update(Rson,M+1,R); else maintain(Rson,M+1,R);
}
maintain(o,L,R);
}
void pushdown(int o)
{
if (setv[o]>0)
{
setv[Lson]=setv[Rson]=setv[o];
addv[Lson]=addv[Rson]=0;
setv[o]=-1;
}
if (addv[o])
{
addv[Lson]+=addv[o];
addv[Rson]+=addv[o];
addv[o]=0;
}
}
void query2(int o,int L,int R,ll add)
{
if (setv[o]>=0)
{
_sum+=setv[o]*(min(R,y2)-max(L,y1)+1);
_min=min(_min,setv[o]);
_max=max(_max,setv[o]);
} else if (y1<=L&&R<=y2)
{
_sum+=sumv[o];
_min=min(_min,minv[o]);
_max=max(_max,maxv[o]);
} else {
int M=(L+R)>>1;
if (y1<=M) query2(Lson,L,M,add+addv[o]);
if (M< y2) query2(Rson,M+1,R,add+addv[o]);
}
}
ll _min,_max,_sum;
void query(int o,int L,int R,ll add)
{
if (y1<=L&&R<=y2)
{
_sum+=sumv[o]+add*(R-L+1);
_min=min(_min,minv[o]+add);
_max=max(_max,maxv[o]+add);
}
else{
int M=(R+L)>>1;
if (y1<=M) query(Lson,L,M,add+addv[o]);
if (M< y2) query(Rson,M+1,R,add+addv[o]);
}
}
//先set后add
}S;
int main()
{
freopen(".in","r",stdin);
freopen(".out","w",stdout);
return 0;
}