QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#720592#7787. Maximum RatinghanmxRE 0ms3816kbC++174.9kb2024-11-07 13:24:352024-11-07 13:24:35

Judging History

你现在查看的是最新测评结果

  • [2024-11-07 13:24:35]
  • 评测
  • 测评结果:RE
  • 用时:0ms
  • 内存:3816kb
  • [2024-11-07 13:24:35]
  • 提交

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();
    };
    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;
        }
        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;
            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<<check(sum)<<"\n";
        cout<<cnt-(cnt-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: 3780kb

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: 3564kb

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: 3568kb

input:

1 1
1000000000
1 1000000000

output:

1

result:

ok 1 number(s): "1"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3816kb

input:

1 1
-1000000000
1 -1000000000

output:

1

result:

ok 1 number(s): "1"

Test #5:

score: -100
Runtime Error

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:


result: