QOJ.ac
QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#641003 | #5069. Vacation | SimonLJK | WA | 671ms | 368496kb | C++14 | 6.7kb | 2024-10-14 17:33:51 | 2024-10-14 17:33:51 |
Judging History
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;
}
詳細信息
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'