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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#641003#5069. VacationSimonLJKWA 671ms368496kbC++146.7kb2024-10-14 17:33:512024-10-14 17:33:51

Judging History

你现在查看的是最新测评结果

  • [2024-10-14 17:33:51]
  • 评测
  • 测评结果:WA
  • 用时:671ms
  • 内存:368496kb
  • [2024-10-14 17:33:51]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define mid (l+r>>1)
const int N=5e5+99;
int n,m,q,c,a[N];
int L[N],R[N],bel[N];
int st[N],ed[N];
struct SGT1{//最大子段和
	int rt[N],cntnode;
	struct tree{
		int ln,rn;
		int lmx,rmx,mx,sum;
		tree(){ ln=rn=0; }
	}tr[N<<2];
	SGT1(){ memset(rt,0,sizeof(rt)); cntnode=0; }
	void pushup(int node){ 
		tr[node].lmx=max(tr[tr[node].ln].lmx,tr[tr[node].ln].sum+tr[tr[node].rn].lmx);
		tr[node].rmx=max(tr[tr[node].rn].rmx,tr[tr[node].rn].sum+tr[tr[node].ln].rmx);
		tr[node].mx=max(max(tr[tr[node].ln].mx,tr[tr[node].rn].mx),tr[tr[node].ln].rmx+tr[tr[node].rn].lmx);
		tr[node].sum=tr[tr[node].ln].sum+tr[tr[node].rn].sum;
		return;
	}
	void build(int &node,int l,int r){
		if(!node) node=++cntnode;
		if(l==r){ tr[node].lmx=tr[node].rmx=tr[node].mx=max(a[l],0ll); tr[node].sum=a[l]; return; }
		build(tr[node].ln,l,mid); build(tr[node].rn,mid+1,r);
		pushup(node);
		return;
	}
	void change(int node,int l,int r,int tar){
		if(l==r){ tr[node].lmx=tr[node].rmx=tr[node].mx=max(a[l],0ll); tr[node].sum=a[l]; return; }
		if(tar<=mid) change(tr[node].ln,l,mid,tar);
		else change(tr[node].rn,mid+1,r,tar);
		pushup(node);
		return;
	}
	int cnt;
	tree ab[100],now,ans;
	void query(int node,int l,int r,int tarl,int tarr){
		if(tarl<=l&&r<=tarr){ ab[++cnt]=tr[node]; return; }
		if(tarl<=mid) query(tr[node].ln,l,mid,tarl,tarr);
		if(tarr>mid) query(tr[node].rn,mid+1,r,tarl,tarr);
		return;
	}
	int query(int l,int r){
		cnt=0;
		query(1,1,n,l,r);
		ans=ab[1];
		for(int i=2;i<=cnt;i++){
			now=ans;
			ans.lmx=max(now.lmx,now.sum+ab[i].lmx);
			ans.rmx=max(ab[i].rmx,ab[i].sum+now.rmx);
			ans.mx=max(max(now.mx,ab[i].mx),now.rmx+ab[i].lmx);
			ans.sum=now.sum+ab[i].sum;
		}
		return ans.mx;
	}
}SA,SP;
int apre[N],abac[N];
struct SGT3{//前后段拼接
	int rt[N],cntnode;
	SGT3(){ memset(rt,0,sizeof(rt)); cntnode=0; }
	struct tree{
		int ln,rn;
		int pmx,bmx,ans;
		int tagp,tagb;
		tree(){ ln=rn=tagp=tagb=0; }
	}tr[N<<2];
	void pushto(int node,int tp,int tb){
		tr[node].pmx+=tp; tr[node].bmx+=tb;
		tr[node].tagp+=tp; tr[node].tagb+=tb;
		tr[node].ans+=tp+tb;
	}
	void pushdown(int node){
		if(!tr[node].tagp&&!tr[node].tagb) return;
		pushto(tr[node].ln,tr[node].tagp,tr[node].tagb);
		pushto(tr[node].rn,tr[node].tagp,tr[node].tagb);
		tr[node].tagp=tr[node].tagb=0;
		return;
	}
	void pushup(int node){
		tr[node].pmx=max(tr[tr[node].ln].pmx,tr[tr[node].rn].pmx);
		tr[node].bmx=max(tr[tr[node].ln].bmx,tr[tr[node].rn].bmx);
		tr[node].ans=max(max(tr[tr[node].ln].ans,tr[tr[node].rn].ans),tr[tr[node].ln].pmx+tr[tr[node].rn].bmx);
		return;
	}
	void build(int &node,int l,int r){
		if(!node) node=++cntnode;
		if(l==r){ tr[node].pmx=apre[l]; tr[node].bmx=abac[l]; tr[node].ans=-1e17; return; }
		build(tr[node].ln,l,mid); build(tr[node].rn,mid+1,r);
		pushup(node);
		return;
	}
	void change(int node,int l,int r,int tarl,int tarr,int val,int tp){
		// 0 for pre ; 1 for bac
		if(tarl<=l&&r<=tarr){
			if(tp==0) tr[node].pmx+=val,tr[node].tagp+=val,tr[node].ans+=val;
			else tr[node].bmx+=val,tr[node].tagb+=val,tr[node].ans+=val;
			return;
		}
		pushdown(node);
		if(tarl<=mid) change(tr[node].ln,l,mid,tarl,tarr,val,tp);
		if(tarr>mid) change(tr[node].rn,mid+1,r,tarl,tarr,val,tp);
		pushup(node);
		return;
	}
	int query(int node,int l,int r,int tarl,int tarr){
		if(tarl<=l&&r<=tarr) return tr[node].ans;
		pushdown(node);
		if(tarr<=mid) return query(tr[node].ln,l,mid,tarl,tarr);
		if(tarl>mid) return query(tr[node].rn,mid+1,r,tarl,tarr);
		return max(query(tr[node].ln,l,mid,tarl,tarr),query(tr[node].rn,mid+1,r,tarl,tarr));
	}
}S;

#define ln node<<1
#define rn node<<1|1
int MX[2][N];
//0 整段 ,1 前后段
struct SGT2{//最大子段和最值
	int mx[N<<2];
	SGT2(){ memset(mx,0,sizeof(mx)); }
	void build(int node,int l,int r,int tp){
		if(l==r){ mx[node]=MX[tp][l]; return; }
		build(ln,l,mid,tp); build(rn,mid+1,r,tp);
		mx[node]=max(mx[ln],mx[rn]);
		return;
	}
	void change(int node,int l,int r,int tar,int tp){
		if(l==r){ mx[node]=MX[tp][l]; return; }
		if(tar<=mid) change(ln,l,mid,tar,tp);
		else change(rn,mid+1,r,tar,tp);
		mx[node]=max(mx[ln],mx[rn]);
		return;
	}
	int query(int node,int l,int r,int tarl,int tarr){
		if(tarl<=l&&r<=tarr) return mx[node];
		int re=0;
		if(tarl<=mid) re=max(re,query(ln,l,mid,tarl,tarr));
		if(tarr>mid) re=max(re,query(rn,mid+1,r,tarl,tarr));
		return re;
	}
}sgt0,sgt1;
void init(){
	for(int i=1;i<=n;i++){
		L[i]=(i-1)/c*c+1;
		R[i]=L[i]+c-1;
		bel[i]=(i-1)/c+1;
	}
	SA.build(SA.rt[1],1,n);
	for(int i=1;i<=n/c;i++)
		SP.build(SP.rt[i],st[i]=i*c-c+1,ed[i]=i*c);
	for(int i=1;i<=m;i++){
		apre[st[i]]=a[st[i]];
		for(int j=st[i]+1;j<=ed[i];j++)
			apre[j]=apre[j-1]+a[j];
		S.build(S.rt[i],st[i],ed[i]);
		if(i==m) continue;
		abac[c+ed[i]]=a[ed[i]];
		for(int j=ed[i]-1;j>=st[i];j--)
			abac[c+j]=abac[c+j+1]+a[j];
	}
	for(int i=1;i<=m;i++)
		MX[0][i]=SP.tr[SP.rt[i]].mx,MX[1][i]=S.tr[S.rt[i]].ans;
	sgt0.build(1,1,m,0); sgt1.build(1,1,m,1);
	return;
}
void change(int x,int delta){
	S.change(S.rt[bel[x]],L[x],R[x],x,R[x],delta,0);
	MX[1][bel[x]]=S.tr[S.rt[bel[x]]].ans;
	sgt1.change(1,1,m,bel[x],1);
	if(bel[x]!=m){
		S.change(S.rt[bel[x]+1],L[x+c],R[x+c],L[x+c],x+c,delta,1);
		MX[1][bel[x]+1]=S.tr[S.rt[bel[x]+1]].ans;
		sgt1.change(1,1,m,bel[x]+1,1);
	}
	return;
}
void update(int x){
	SA.change(1,1,n,x);
	SP.change(SP.rt[bel[x]],st[bel[x]],ed[bel[x]],x);
	MX[0][bel[x]]=SP.tr[SP.rt[bel[x]]].mx;
	sgt0.change(1,1,m,bel[x],0);
	return;
}
int cnt;
void solve(int l,int r){
	int ans=0;
	if(r-l+1<=c) ans=max(ans,SA.query(l,r));
	else if(bel[l]+1==bel[r]){
		ans=max(ans,SA.query(l,l+c-1));
		ans=max(ans,SA.query(r-c+1,r));
		ans=max(ans,S.query(S.rt[bel[r]],L[r],R[r],l+c,r));
	}
	else{
		ans=max(ans,SA.query(l,l+c-1));
		ans=max(ans,SA.query(r-c+1,r));
		ans=max(ans,sgt0.query(1,1,m,bel[l]+1,bel[r]-1));
		if(bel[l]+1!=bel[r]-1)
			ans=max(ans,sgt1.query(1,1,m,bel[l]+2,bel[r]-1));
		ans=max(ans,S.query(S.rt[bel[r]],L[r],R[r],L[r],r));
		ans=max(ans,S.query(S.rt[bel[l]+1],L[l+c],R[l+c],l+c,R[l+c]));
	}
	if(c==5){
		cnt++;
		if(cnt==6288){
			cout<<l<<" "<<r<<endl;
			for(int i=l;i<=l+10;i++)
				cout<<a[i]<<" ";
			cout<<endl;
			for(int i=r-10;i<=r;i++)
				cout<<a[i]<<" ";
			cout<<endl;
		}
		return;
	}
	cout<<ans<<'\n';
	return;
}
signed main(){
	std::ios::sync_with_stdio(false);
	cin.tie(0);
	cin>>n>>q>>c;
	for(int i=1;i<=n;i++) cin>>a[i];
	n=((n-1)/c+1)*c; m=n/c;
	init();
	int tp,x,y,l,r;
	while(q--){
		cin>>tp;
//		cout<<tp<<endl;
		if(tp==1){
			cin>>x>>y;
			change(x,y-a[x]);
			a[x]=y; update(x);
		}
		else{
			cin>>l>>r;
			solve(l,r);
		}
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 12ms
memory: 346952kb

input:

5 6 3
0 -5 -3 8 -3
2 3 5
1 2 5
2 1 5
1 4 -3
2 3 5
2 1 5

output:

8
10
0
5

result:

ok 4 number(s): "8 10 0 5"

Test #2:

score: 0
Accepted
time: 653ms
memory: 360216kb

input:

200000 500000 1
387060158 961744470 37167782 737122872 -532977662 1604246 -30977399 871848791 444997246 454204578 -813187501 -660394286 448014171 -835115276 -631880452 887715308 258530352 805589560 -414653327 -156732249 -335096199 -80266237 367896009 738406627 -903652056 446120866 415658444 -1347916...

output:

999902477
999981999
999343404
999847372
999957587
998160312
999981999
999981999
999981999
999980061
999981999
999981999
999981999
999876122
999981999
999996602
999981999
999981999
999981999
999723649
999981999
999957587
999896087
999981999
999981999
999981999
999981999
999981999
999957587
999981999
...

result:

ok 250051 numbers

Test #3:

score: -100
Wrong Answer
time: 671ms
memory: 368496kb

input:

200000 500000 5
802774074 383481934 -295470374 285359286 751657057 197444479 626916547 -828168464 288373833 -493446966 -208422769 956745384 919286225 959643271 -176531848 -380256966 357111771 -50890039 -637284768 -337010918 259019684 752475630 -259898780 98620995 -704832505 -532710796 -971600790 -84...

output:

28239 33849
-331316802 -974755314 343984643 907142628 145309259 -798162846 -791118186 -348339347 65587320 -64714618 -795360504 
-775532302 744709498 -502093906 267610326 -462478847 958622049 629453463 836026517 966754433 932469376 202220824 

result:

wrong answer 1st numbers differ - expected: '4544135313', found: '28239'