概述
发现cf文本读确实变快了,但是用了快读树剖还是过不了2e5,好像常数大了4?
后来才想起来这是离线的树链改值,差分就行了
跪了的树剖:
#include<bits/stdc++.h>
//#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<stdio.h>
#include<algorithm>
#include<queue>
#include<string.h>
#include<iostream>
#include<math.h>
#include<stack>
#include<set>
#include<map>
#include<vector>
#include<iomanip>
#include<bitset>
using namespace std; //
#define ll long long
#define ull unsigned long long
#define pb push_back
#define FOR(a) for(int i=1;i<=a;i++)
#define sqr(a) (a)*(a)
#define dis(a,b) sqrt(sqr(a.x-b.x)+sqr(a.y-b.y))
ll qp(ll a,ll b,ll mod){
ll t=1;while(b){if(b&1)t=t*a%mod;b>>=1;a=a*a%mod;}return t;
}
struct DOT{ll x;ll y;};
//inline void read(int &x){int k=0;char f=1;char c=getchar();for(;!isdigit(c);c=getchar())if(c=='-')f=-1;for(;isdigit(c);c=getchar())k=k*10+c-'0';x=k*f;}
const int dx[4]={0,0,-1,1};
const int dy[4]={1,-1,0,0};
const int inf=0x3f3f3f3f;
const ll Linf=0x3f3f3f3f3f3f3f3f;
const ll mod=1e9+7;;
namespace fastIO{
#define BUF_SIZE 100000
#define OUT_SIZE 100000
#define ll long long
//fread->read
bool IOerror=0;
inline char nc(){
static char buf[BUF_SIZE],*p1=buf+BUF_SIZE,*pend=buf+BUF_SIZE;
if (p1==pend){
p1=buf; pend=buf+fread(buf,1,BUF_SIZE,stdin);
if (pend==p1){IOerror=1;return -1;}
//{printf("IO error!n");system("pause");for (;;);exit(0);}
}
return *p1++;
}
inline bool blank(char ch){return ch==' '||ch=='n'||ch=='r'||ch=='t';}
inline void read(int &x){
bool sign=0; char ch=nc(); x=0;
for (;blank(ch);ch=nc());
if (IOerror)return;
if (ch=='-')sign=1,ch=nc();
for (;ch>='0'&&ch<='9';ch=nc())x=x*10+ch-'0';
if (sign)x=-x;
}
inline void read(ll &x){
bool sign=0; char ch=nc(); x=0;
for (;blank(ch);ch=nc());
if (IOerror)return;
if (ch=='-')sign=1,ch=nc();
for (;ch>='0'&&ch<='9';ch=nc())x=x*10+ch-'0';
if (sign)x=-x;
}
inline void read(double &x){
bool sign=0; char ch=nc(); x=0;
for (;blank(ch);ch=nc());
if (IOerror)return;
if (ch=='-')sign=1,ch=nc();
for (;ch>='0'&&ch<='9';ch=nc())x=x*10+ch-'0';
if (ch=='.'){
double tmp=1; ch=nc();
for (;ch>='0'&&ch<='9';ch=nc())tmp/=10.0,x+=tmp*(ch-'0');
}
if (sign)x=-x;
}
inline void read(char *s){
char ch=nc();
for (;blank(ch);ch=nc());
if (IOerror)return;
for (;!blank(ch)&&!IOerror;ch=nc())*s++=ch;
*s=0;
}
inline void read(char &c){
for (c=nc();blank(c);c=nc());
if (IOerror){c=-1;return;}
}
#undef OUT_SIZE
#undef BUF_SIZE
}; using namespace fastIO;
const int maxn=2e5+9;
int n;
struct EDGE{
int v;int w;int next;
}G[maxn<<2];
int head[maxn],tot;
inline void addedge(int u,int v,int w){
++tot;G[tot].v=v;G[tot].next=head[u];G[tot].w=w;head[u]=tot;
}
int top[maxn];
int pre[maxn];
int dep[maxn];
int num[maxn]; //子树尺寸
int p[maxn]; //v的对应位置
int out[maxn]; //退出时间戳
int fp[maxn]; //访问序列
int son[maxn]; //重儿子
int pos; //计时器
inline void init(){
memset(head,-1,sizeof head);tot=0;
memset(son,-1,sizeof son);
}
inline void dfs1(int u,int fa,int d){
dep[u]=d;
pre[u]=fa;
num[u]=1;
for(int i=head[u];~i;i=G[i].next){
int v=G[i].v;
if(v==fa)continue;
dfs1(v,u,d+G[i].w);
num[u]+=num[v];
if(son[u]==-1||num[v]>num[son[u]])son[u]=v;
}
}
inline void getpos(int u,int sp){
top[u]=sp;
p[u]=out[u]=++pos;
//cout<<u<<"ww"<<p[u]<<endl;
fp[p[u]]=u;
if(son[u]==-1)return;
getpos(son[u],sp);
for(int i=head[u];~i;i=G[i].next){
int v=G[i].v;
if(v!=son[u]&&v!=pre[u])getpos(v,v);
}
out[u]=pos;
}
int a[maxn];
struct NODE{
int l,r;
ll sum;
ll add;
}ST[maxn<<2];
inline void pushup(int rt){
ST[rt].sum=ST[rt<<1].sum+ST[rt<<1|1].sum;
}
inline void pushdown(int rt){
if(ST[rt].add){
ST[rt<<1].sum+=ST[rt].add*(ST[rt<<1].r-ST[rt<<1].l+1);
ST[rt<<1|1].sum+=ST[rt].add*(ST[rt<<1|1].r-ST[rt<<1|1].l+1);
ST[rt<<1].add+=ST[rt].add;
ST[rt<<1|1].add+=ST[rt].add;
ST[rt].add=0;
}
}
inline void build(int l,int r,int rt){
if(l==r){ST[rt].l=ST[rt].r=l;ST[rt].sum=0;return;}
ST[rt].l=l;ST[rt].r=r;
int m=l+r>>1;
build(l,m,rt<<1);build(m+1,r,rt<<1|1);pushup(rt);
}
inline void update(int a,int b,int c,int l,int r,int rt){
if(a<=l&&b>=r){
ST[rt].sum+=(r-l+1)*c;
ST[rt].add+=c;
return;
}
int m=l+r>>1;
pushdown(rt);
if(a<=m)update(a,b,c,l,m,rt<<1);
if(b> m)update(a,b,c,m+1,r,rt<<1|1);
pushup(rt);
}
inline ll query(int x,int l,int r,int rt){
if(l==r){return ST[rt].sum;}
int m=l+r>>1;
pushdown(rt);
if(x<=m)return query(x,l,m,rt<<1);
else return query(x,m+1,r,rt<<1|1);
}
inline void solve(int u,int v){
while(top[u]!=top[v]){
if(dep[top[u]]<dep[top[v]])swap(u,v);
update(p[top[u]],p[u],1,1,n,1);
u=pre[top[u]];
}
if(dep[u]<dep[v])swap(u,v);
//cout<<p[u]<<"ww"<<p[v]<<endl;
update(p[v],p[u],1,1,n,1);
}
int fa[maxn][50];
ll falen[maxn][50];
int main(){
//scanf("%d",&n);
read(n);
init();
for(int i=1;i<=n;i++){
//scanf("%d",&a[i]);
read(a[i]);
}
for(int i=2,x,y;i<=n;i++){
//scanf("%d%d",&x,&y);
read(x);read(y);
addedge(x,i,y);
fa[i][0]=x;
falen[i][0]=y;
}
dfs1(1,1,0);
getpos(1,1);
build(1,n,1);
for(int i=0;i<=32;i++){
fa[1][i]=0;
falen[0][i]=Linf;
falen[1][i]=Linf;
}
for(int i=1;i<=32;i++){
for(int j=1;j<=n;j++){
fa[j][i]=fa[fa[j][i-1]][i-1];
if(falen[fa[j][i-1]][i-1]==Linf){
falen[j][i]=Linf;continue;
}
falen[j][i]=falen[fa[j][i-1]][i-1]+falen[j][i-1];
}
}
for(int i=2;i<=n;i++){
int now=i;
for(int j=32;j>=0;j--){
if(falen[now][j] <= a[i]){
a[i]-=falen[now][j];
now=fa[now][j];
}
//cout<<i<<"ww"<<now<<"ww"<<a[i]<<endl;
}
if(i==now)continue;
solve(fa[i][0],now);
}
for(int i=1;i<=n;i++)printf("%lld ",query(p[i],1,n,1));
}
A了的差分,都用的倍增
#include<bits/stdc++.h>
//#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<stdio.h>
#include<algorithm>
#include<queue>
#include<string.h>
#include<iostream>
#include<math.h>
#include<stack>
#include<set>
#include<map>
#include<vector>
#include<iomanip>
#include<bitset>
using namespace std; //
#define ll long long
#define ull unsigned long long
#define pb push_back
#define FOR(a) for(int i=1;i<=a;i++)
#define sqr(a) (a)*(a)
#define dis(a,b) sqrt(sqr(a.x-b.x)+sqr(a.y-b.y))
ll qp(ll a,ll b,ll mod){
ll t=1;while(b){if(b&1)t=t*a%mod;b>>=1;a=a*a%mod;}return t;
}
struct DOT{ll x;ll y;};
inline void read(int &x){int k=0;char f=1;char c=getchar();for(;!isdigit(c);c=getchar())if(c=='-')f=-1;for(;isdigit(c);c=getchar())k=k*10+c-'0';x=k*f;}
const int dx[4]={0,0,-1,1};
const int dy[4]={1,-1,0,0};
const int inf=0x3f3f3f3f;
const ll Linf=0x3f3f3f3f3f3f3f3f;
const ll mod=1e9+7;;
const int maxn=2e5+9;
int n;
struct EDGE{
int v;int w;int next;
}G[maxn<<2];
int head[maxn],tot;
inline void addedge(int u,int v,int w){
++tot;G[tot].v=v;G[tot].next=head[u];G[tot].w=w;head[u]=tot;
}
/*
int top[maxn];
int pre[maxn];
int dep[maxn];
int num[maxn]; //子树尺寸
int p[maxn]; //v的对应位置
int out[maxn]; //退出时间戳
int fp[maxn]; //访问序列
int son[maxn]; //重儿子
int pos; //计时器
*/
inline void init(){
memset(head,-1,sizeof head);tot=0;
//memset(son,-1,sizeof son);
}
/*
inline void dfs1(int u,int fa,int d){
dep[u]=d;
pre[u]=fa;
num[u]=1;
for(int i=head[u];~i;i=G[i].next){
int v=G[i].v;
if(v==fa)continue;
dfs1(v,u,d+G[i].w);
num[u]+=num[v];
if(son[u]==-1||num[v]>num[son[u]])son[u]=v;
}
}
inline void getpos(int u,int sp){
top[u]=sp;
p[u]=out[u]=++pos;
fp[p[u]]=u;
if(son[u]==-1)return;
getpos(son[u],sp);
for(int i=head[u];~i;i=G[i].next){
int v=G[i].v;
if(v!=son[u]&&v!=pre[u])getpos(v,v);
}
out[u]=pos;
}
*/
ll add[maxn];
int a[maxn];
/*
struct NODE{
int l,r;
ll sum;
ll add;
}ST[maxn<<2];
inline void pushup(int rt){
ST[rt].sum=ST[rt<<1].sum+ST[rt<<1|1].sum;
}
inline void pushdown(int rt){
if(ST[rt].add){
ST[rt<<1].sum+=ST[rt].add*(ST[rt<<1].r-ST[rt<<1].l+1);
ST[rt<<1|1].sum+=ST[rt].add*(ST[rt<<1|1].r-ST[rt<<1|1].l+1);
ST[rt<<1].add+=ST[rt].add;
ST[rt<<1|1].add+=ST[rt].add;
ST[rt].add=0;
}
}
inline void build(int l,int r,int rt){
if(l==r){ST[rt].l=ST[rt].r=l;ST[rt].sum=0;return;}
ST[rt].l=l;ST[rt].r=r;
int m=l+r>>1;
build(l,m,rt<<1);build(m+1,r,rt<<1|1);pushup(rt);
}
inline void update(int a,int b,int c,int l,int r,int rt){
if(a<=l&&b>=r){
ST[rt].sum+=(r-l+1)*c;
ST[rt].add+=c;
return;
}
int m=l+r>>1;
pushdown(rt);
if(a<=m)update(a,b,c,l,m,rt<<1);
if(b> m)update(a,b,c,m+1,r,rt<<1|1);
pushup(rt);
}
inline ll query(int x,int l,int r,int rt){
if(l==r){return ST[rt].sum;}
int m=l+r>>1;
pushdown(rt);
if(x<=m)return query(x,l,m,rt<<1);
else return query(x,m+1,r,rt<<1|1);
}
inline void solve(int u,int v){
while(top[u]!=top[v]){
if(dep[top[u]]<dep[top[v]])swap(u,v);
update(p[top[u]],p[u],1,1,n,1);
u=pre[top[u]];
}
if(dep[u]<dep[v])swap(u,v);
//cout<<p[u]<<"ww"<<p[v]<<endl;
update(p[v],p[u],1,1,n,1);
}
*/
int fa[maxn][50];
ll falen[maxn][50];
void dfs(int u){
for(int i=head[u];~i;i=G[i].next){
dfs(G[i].v);
add[u]+=add[G[i].v];
}
}
int main(){
//scanf("%d",&n);
read(n);
init();
for(int i=1;i<=n;i++){
//scanf("%d",&a[i]);
read(a[i]);
}
for(int i=2,x,y;i<=n;i++){
//scanf("%d%d",&x,&y);
read(x);read(y);
addedge(x,i,y);
fa[i][0]=x;
falen[i][0]=y;
}
//dfs1(1,1,0);
//getpos(1,1);
//build(1,n,1);
for(int i=0;i<=32;i++){
fa[1][i]=0;
falen[0][i]=Linf;
falen[1][i]=Linf;
}
for(int i=1;i<=32;i++){
for(int j=1;j<=n;j++){
fa[j][i]=fa[fa[j][i-1]][i-1];
if(falen[fa[j][i-1]][i-1]==Linf){
falen[j][i]=Linf;continue;
}
falen[j][i]=falen[fa[j][i-1]][i-1]+falen[j][i-1];
}
}
for(int i=2;i<=n;i++){
int now=i;
for(int j=32;j>=0;j--){
if(falen[now][j] <= a[i]){
a[i]-=falen[now][j];
now=fa[now][j];
}
//cout<<i<<"ww"<<now<<"ww"<<a[i]<<endl;
}
if(i==now)continue;
//solve(fa[i][0],now);
add[fa[i][0]]++;add[fa[now][0]]--;
}
dfs(1);
for(int i=1;i<=n;i++)printf("%lld ",add[i]);
//for(int i=1;i<=n;i++)printf("%lld ",query(p[i],1,n,1));
}
最后
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