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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#720929 | #7787. Maximum Rating | hanmx | WA | 1ms | 4016kb | C++17 | 5.1kb | 2024-11-07 14:43:48 | 2024-11-07 14:43:49 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using ll=long long;
using i64=long long;
using u64=unsigned long long;
template<class Info>
struct SegementTree{
int n;
vector<Info> info;
SegementTree():n(0){}
SegementTree(int n_,Info v_=Info()){
init(n_,v_);
}
template<class T>
SegementTree(vector<T> init_){
init(init_);
}
void init(int n_,Info v_=Info()){
init(vector(n_,v_));
}
template<class T>
void init(vector<T> init_){
n=init_.size()-1;
info.assign((n+1)<<2,Info());
function<void(int,int,int)> build=[&](int p,int l,int r){
if(l==r){
info[p]=init_[l];
return;
}
int m=(l+r)/2;
build(p*2,l,m);
build(p*2+1,m+1,r);
push_up(p);
};
build(1,1,n);
}
void push_up(int p){
info[p]=info[p*2]+info[p*2+1];
}
void modify(int p,int l,int r,int x,const Info& u){
if(l==r){
info[p]=info[p]+u;
return;
}
int m=(l+r)/2;
if(x<=m) modify(p*2,l,m,x,u);
else modify(p*2+1,m+1,r,x,u);
push_up(p);
}
void modify(int p,const Info& u){
modify(1,1,n,p,u);
}
Info query(int p,int l,int r,int st,int en){
if(st<=l&&r<=en){
return info[p];
}
int m=(l+r)/2;
Info sum;
if(st<=m) sum=sum+query(p*2,l,m,st,en);
if(en>m) sum=sum+query(p*2+1,m+1,r,st,en);
return sum;
}
Info query(int l,int r){
return query(1,1,n,l,r);
}
template<class F>
int findfirst(int p,int l,int r,int x,int y,F pre){
if(l>y||r<x||!pre(info[p])){
return -1;
}
if(l==r){
return l;
}
int mid=(l+r)/2;
int res=findfirst(p*2,l,mid,x,y,pre);
if(res==-1){
return findfirst(p*2+1,mid+1,r,x,y,pre);
}
return res;
}
template<class F>
int findfirst(int l,int r,F pre){
return findfirst(1,1,n,l,r,pre);
}
template<class F>
int findlast(int p,int l,int r,int x,int y,F pre){
if(l>y||r<x||!pre(info[p])){
return -1;
}
if(l==r){
return l;
}
int mid=(l+r)/2;
int res=findlast(p*2+1,mid+1,r,x,y,pre);
if(res==-1){
return findlast(p*2,l,mid,x,y,pre);
}
return res;
}
template<class F>
int findlast(int l,int r,F pre){
return findlast(1,1,n,l,r,pre);
}
};
struct Info{
int num=0;
ll sum=0;
};
Info operator+(const Info &a,const Info &b){
Info c;
c.num=a.num+b.num;
c.sum=a.sum+b.sum;
return c;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n,q;
cin>>n>>q;
const int N=n+q;
SegementTree<Info> seg(N+1);
ll sum=0;
vector<int> p;
vector<int> a(n+1);
int cnt=0;
for(int i=1;i<=n;i++){
cin>>a[i];
if(a[i]<0) sum+=-a[i];
else{
cnt++;
p.push_back(a[i]);
}
}
vector<pair<int,int>> ans(q+1);
for(int i=1;i<=q;i++){
int x,y;
cin>>x>>y;
ans[i]={x,y};
if(y>0){
p.push_back(y);
}
}
auto b=p;
sort(b.begin(),b.end());
b.erase(unique(b.begin(),b.end()),b.end());
auto find=[&](Info &a)->bool{
if(a.sum>0) return 1;
return 0;
};
auto id=[&](int x)->int{
return lower_bound(b.begin(),b.end(),x)-b.begin()+1;
};
for(int i=0;i<cnt;i++){
seg.modify(id(p[i]),{1,p[i]});
}
auto check=[&](ll sum)->int{
int l=1;
int r=N;
int ans=0;
int p=0;
while(l<=r){
int m=(l+r)/2;
if(seg.query(1,m).sum<=sum){
ans=seg.query(1,m).num;
p=m;
l=m+1;
}
else r=m-1;
}
if(p!=0&&sum==seg.query(1,p).sum) return ans;
int x=seg.findfirst(p+1,N,find);
if(x!=-1){
if(p!=0) ans=seg.query(1,p).num;
else ans=0;
ll z;
if(!p) z=sum;
else z=sum-seg.query(1,p).sum;
int val=seg.query(x,x).sum/seg.query(x,x).num;
if(val!=0) ans+=z/val;
}
return ans;
};
for(int i=1;i<=q;i++){
auto [x,y]=ans[i];
if(a[x]<0){
sum+=a[x];
}
else{
cnt--;
seg.modify(id(a[x]),{-1,-a[x]});
//cout<<id(a[x])<<"\n";
}
a[x]=y;
if(y<0){
sum-=y;
}
else{
cnt++;
seg.modify(id(y),{1,y});
//cout<<id(y)<<"\n";
}
//cout<<sum<<" "<<seg.query(1,N).sum<<"\n";
if(sum>seg.query(1,N).sum) cout<<cnt+1<<"\n";
else cout<<check(sum)+1<<"\n";
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3620kb
input:
3 5 1 2 3 3 4 2 -2 1 -3 3 1 2 1
output:
1 2 2 2 3
result:
ok 5 number(s): "1 2 2 2 3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3788kb
input:
3 5 1 2 3 3 4 2 -2 1 3 3 1 2 1
output:
1 2 1 2 1
result:
ok 5 number(s): "1 2 1 2 1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3556kb
input:
1 1 1000000000 1 1000000000
output:
1
result:
ok 1 number(s): "1"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3820kb
input:
1 1 -1000000000 1 -1000000000
output:
1
result:
ok 1 number(s): "1"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3796kb
input:
1000 1000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
output:
946 65 252 410 915 592 983 487 343 899 809 432 586 587 139 464 804 84 476 699 504 149 579 352 375 856 545 166 140 657 568 509 275 710 873 430 537 879 301 1 298 970 923 510 984 642 55 879 941 344 464 788 917 994 571 610 491 442 926 101 986 840 624 613 425 345 816 423 275 221 317 113 386 116 469 260 4...
result:
ok 1000 numbers
Test #6:
score: -100
Wrong Answer
time: 1ms
memory: 4016kb
input:
1000 1000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000000 1 -1000000...
output:
500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 ...
result:
wrong answer 394th numbers differ - expected: '500', found: '501'