oj.uz

답안 #1113147

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1113147 2024-11-15T22:33:59 Z ttamx Growing Vegetables is Fun 5 (JOI24_vegetables5) C++17
30 / 100
 5000 ms 56924 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("Ofast,unroll-loops")

using namespace std;

const int N=3e5+5;
const int INF=INT_MAX/2;

int n;
int a[3*N],b[N],c[N],pos[3*N];
bool lo[3*N],d[3*N];

struct Info{
    int sum,pre,suf,mx;
    static Info unit(){
        return {0,-INF,-INF,-INF};
    }
    friend Info operator+(const Info &l,const Info &r){
        return {l.sum+r.sum,max(l.pre,l.sum+r.pre),max(r.suf,r.sum+l.suf),max({l.mx,r.mx,l.suf+r.pre})};
    }
};

struct Deque{
    using P = pair<Info,int>;
    deque<P> dq;
    vector<Info> l,r;
    void rebalance(bool left){
        int s=dq.size();
        int m=(s+left)/2;
        l.clear(),r.clear();
        {
            Info sum=Info::unit();
            for(int i=m-1;i>=0;i--){
                sum=dq[i].first+sum;
                l.emplace_back(sum);
            }
        }
        {
            Info sum=Info::unit();
            for(int i=m;i<s;i++){
                sum=sum+dq[i].first;
                r.emplace_back(sum);
            }
        }
    }
    bool empty(){return dq.empty();}
    int size(){return dq.size();};
    P front(){return dq.front();}
    P back(){return dq.back();}
    void push_front(Info x,int v){
        dq.emplace_front(x,v);
        if(l.empty())l.emplace_back(x);
        else l.emplace_back(x+l.back());
    }
    void push_back(Info x,int v){
        dq.emplace_back(x,v);
        if(r.empty())r.emplace_back(x);
        else r.emplace_back(r.back()+x);
    }
    void push_front(P x){push_front(x.first,x.second);}
    void push_back(P x){push_back(x.first,x.second);}
    void pop_front(){
        assert(!dq.empty());
        if(l.empty())rebalance(true);
        dq.pop_front();
        l.pop_back();
    }
    void pop_back(){
        assert(!dq.empty());
        if(r.empty())rebalance(false);
        dq.pop_back();
        r.pop_back();
    }
    Info query(){
        if(dq.empty())return Info::unit();
        if(l.empty())return r.back();
        if(r.empty())return l.back();
        return l.back()+r.back();
    }
};

void calc(int *b,bool *d,int k){
    int st=0,ed=0;
    Deque q1,q2,q3;
    auto work=[&](int i){
        if(lo[i]){
            while(!q1.empty()&&q1.back().second>=pos[i]){
                q2.push_front(q1.back());
                q1.pop_back();
            }
            while(!q2.empty()&&q2.front().second<pos[i]){
                q1.push_back(q2.front());
                q2.pop_front();
            }
            while(!q3.empty()&&q3.front().second<pos[i]){
                q1.push_back(q3.front());
                q3.pop_front();
            }
        }else{
            while(!q3.empty()&&q3.front().second<=pos[i]){
                q2.push_back(q3.front());
                q3.pop_front();
            }
            while(!q2.empty()&&q2.back().second>pos[i]){
                q3.push_front(q2.back());
                q2.pop_back();
            }
            while(!q1.empty()&&q1.back().second>pos[i]){
                q3.push_front(q1.back());
                q1.pop_back();
            }
        }
    };
    for(int i=0;i<3*n;i++){
        while(st<n&&b[st]<a[i]-k)st++;
        while(st>0&&b[st-1]>=a[i]-k)st--;
        while(ed<n&&b[ed]<=a[i]+k)ed++;
        while(ed>0&&b[ed-1]>a[i]+k)ed--;
        work(i);
        Info cur{1,1-ed,1+st,1+st-ed};
        if(lo[i])q2.push_front(cur,pos[i]);
        else q2.push_back(cur,pos[i]);
        if(i>=n){
            work(i-n);
            if(lo[i-n])q2.pop_front();
            else q2.pop_back();
            d[i]=(q1.query()+q2.query()+q3.query()).mx<=0;
        }
    }
}

bool check(int k){
    {
        int st=0,ed=0;
        Deque q1,q2,q3;
        auto work=[&](int i){
            if(lo[i]){
                while(!q1.empty()&&q1.back().second>=pos[i]){
                    q2.push_front(q1.back());
                    q1.pop_back();
                }
                while(!q2.empty()&&q2.front().second<pos[i]){
                    q1.push_back(q2.front());
                    q2.pop_front();
                }
                while(!q3.empty()&&q3.front().second<pos[i]){
                    q1.push_back(q3.front());
                    q3.pop_front();
                }
            }else{
                while(!q3.empty()&&q3.front().second<=pos[i]){
                    q2.push_back(q3.front());
                    q3.pop_front();
                }
                while(!q2.empty()&&q2.back().second>pos[i]){
                    q3.push_front(q2.back());
                    q2.pop_back();
                }
                while(!q1.empty()&&q1.back().second>pos[i]){
                    q3.push_front(q1.back());
                    q1.pop_back();
                }
            }
        };
        for(int i=0;i<3*n;i++){
            while(st<n&&b[st]<a[i]-k)st++;
            while(st>0&&b[st-1]>=a[i]-k)st--;
            while(ed<n&&b[ed]<=a[i]+k)ed++;
            while(ed>0&&b[ed-1]>a[i]+k)ed--;
            work(i);
            Info cur{1,1-ed,1+st,1+st-ed};
            if(lo[i])q2.push_front(cur,pos[i]);
            else q2.push_back(cur,pos[i]);
            if(i>=n){
                work(i-n);
                if(lo[i-n])q2.pop_front();
                else q2.pop_back();
                d[i]=(q1.query()+q2.query()+q3.query()).mx<=0;
            }
        }
    }
    {
        int st=0,ed=0;
        Deque q1,q2,q3;
        auto work=[&](int i){
            if(lo[i]){
                while(!q1.empty()&&q1.back().second>=pos[i]){
                    q2.push_front(q1.back());
                    q1.pop_back();
                }
                while(!q2.empty()&&q2.front().second<pos[i]){
                    q1.push_back(q2.front());
                    q2.pop_front();
                }
                while(!q3.empty()&&q3.front().second<pos[i]){
                    q1.push_back(q3.front());
                    q3.pop_front();
                }
            }else{
                while(!q3.empty()&&q3.front().second<=pos[i]){
                    q2.push_back(q3.front());
                    q3.pop_front();
                }
                while(!q2.empty()&&q2.back().second>pos[i]){
                    q3.push_front(q2.back());
                    q2.pop_back();
                }
                while(!q1.empty()&&q1.back().second>pos[i]){
                    q3.push_front(q1.back());
                    q1.pop_back();
                }
            }
        };
        for(int i=0;i<3*n;i++){
            while(st<n&&c[st]<a[i]-k)st++;
            while(st>0&&c[st-1]>=a[i]-k)st--;
            while(ed<n&&c[ed]<=a[i]+k)ed++;
            while(ed>0&&c[ed-1]>a[i]+k)ed--;
            work(i);
            Info cur{1,1-ed,1+st,1+st-ed};
            if(lo[i])q2.push_front(cur,pos[i]);
            else q2.push_back(cur,pos[i]);
            if(i>=n){
                work(i-n);
                if(lo[i-n])q2.pop_front();
                else q2.pop_back();
                if((q1.query()+q2.query()+q3.query()).mx<=0){
                    if(d[i-n]||(i<2*n&&d[i+n])){
                        return true;
                    }
                }
            }
        }
    }
    return false;
}

int main(){
    cin >> n;
    vector<pair<int,int>> vals;
    for(int i=0;i<2*n;i++){
        cin >> a[i];
        vals.emplace_back(a[i],i>n?~i:i);
    }
    sort(vals.begin(),vals.end());
    for(int i=0;i<2*n;i++){
        int j=vals[i].second;
        pos[j<0?~j:j]=i;
    }
    for(int i=2*n;i<3*n;i++){
        a[i]=a[i-2*n];
        pos[i]=pos[i-2*n];
    }
    for(int i=0;i<2*n;i++){
        lo[i]=pos[i]<pos[i+n];
    }
    for(int i=2*n;i<3*n;i++){
        lo[i]=lo[i-2*n];
    }
    for(int i=0;i<n;i++){
        cin >> b[i];
    }
    for(int i=0;i<n;i++){
        cin >> c[i];
    }
    sort(b,b+n);
    sort(c,c+n);
    int l=0,r=1'000'000'000;
    while(l<r){
        int m=(l+r)/2;
        if(check(m))r=m;
        else l=m+1;
    }
    cout << l << "\n";
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6496 KB Output is correct
2 Correct 1 ms 6484 KB Output is correct
3 Correct 1 ms 6484 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6648 KB Output is correct
6 Correct 2 ms 6480 KB Output is correct
7 Correct 2 ms 6480 KB Output is correct
8 Correct 2 ms 6480 KB Output is correct
9 Correct 2 ms 6596 KB Output is correct
10 Correct 1 ms 6480 KB Output is correct
11 Correct 1 ms 6480 KB Output is correct
12 Correct 2 ms 6480 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6496 KB Output is correct
2 Correct 1 ms 6484 KB Output is correct
3 Correct 1 ms 6484 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6648 KB Output is correct
6 Correct 2 ms 6480 KB Output is correct
7 Correct 2 ms 6480 KB Output is correct
8 Correct 2 ms 6480 KB Output is correct
9 Correct 2 ms 6596 KB Output is correct
10 Correct 1 ms 6480 KB Output is correct
11 Correct 1 ms 6480 KB Output is correct
12 Correct 2 ms 6480 KB Output is correct
13 Correct 2 ms 6480 KB Output is correct
14 Correct 2 ms 6480 KB Output is correct
15 Correct 2 ms 6480 KB Output is correct
16 Correct 1 ms 6480 KB Output is correct
17 Correct 1 ms 6480 KB Output is correct
18 Correct 1 ms 6480 KB Output is correct
19 Correct 1 ms 6480 KB Output is correct
20 Correct 1 ms 6480 KB Output is correct
21 Correct 2 ms 6480 KB Output is correct
22 Correct 1 ms 6480 KB Output is correct
23 Correct 2 ms 6508 KB Output is correct
24 Correct 2 ms 6480 KB Output is correct
25 Correct 1 ms 6480 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6496 KB Output is correct
2 Correct 1 ms 6484 KB Output is correct
3 Correct 1 ms 6484 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6648 KB Output is correct
6 Correct 2 ms 6480 KB Output is correct
7 Correct 2 ms 6480 KB Output is correct
8 Correct 2 ms 6480 KB Output is correct
9 Correct 2 ms 6596 KB Output is correct
10 Correct 1 ms 6480 KB Output is correct
11 Correct 1 ms 6480 KB Output is correct
12 Correct 2 ms 6480 KB Output is correct
13 Correct 2 ms 6480 KB Output is correct
14 Correct 2 ms 6480 KB Output is correct
15 Correct 2 ms 6480 KB Output is correct
16 Correct 1 ms 6480 KB Output is correct
17 Correct 1 ms 6480 KB Output is correct
18 Correct 1 ms 6480 KB Output is correct
19 Correct 1 ms 6480 KB Output is correct
20 Correct 1 ms 6480 KB Output is correct
21 Correct 2 ms 6480 KB Output is correct
22 Correct 1 ms 6480 KB Output is correct
23 Correct 2 ms 6508 KB Output is correct
24 Correct 2 ms 6480 KB Output is correct
25 Correct 1 ms 6480 KB Output is correct
26 Correct 23 ms 6832 KB Output is correct
27 Correct 25 ms 6824 KB Output is correct
28 Correct 17 ms 6824 KB Output is correct
29 Correct 2 ms 6480 KB Output is correct
30 Correct 27 ms 6828 KB Output is correct
31 Correct 22 ms 6904 KB Output is correct
32 Correct 11 ms 6736 KB Output is correct
33 Correct 6 ms 6480 KB Output is correct
34 Correct 26 ms 6736 KB Output is correct
35 Correct 26 ms 6836 KB Output is correct
36 Correct 30 ms 6736 KB Output is correct
37 Correct 22 ms 6848 KB Output is correct
38 Correct 26 ms 6856 KB Output is correct
39 Correct 26 ms 7000 KB Output is correct
40 Correct 17 ms 7000 KB Output is correct

Subtask #4
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 5045 ms 56924 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6496 KB Output is correct
2 Correct 1 ms 6484 KB Output is correct
3 Correct 1 ms 6484 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6648 KB Output is correct
6 Correct 2 ms 6480 KB Output is correct
7 Correct 2 ms 6480 KB Output is correct
8 Correct 2 ms 6480 KB Output is correct
9 Correct 2 ms 6596 KB Output is correct
10 Correct 1 ms 6480 KB Output is correct
11 Correct 1 ms 6480 KB Output is correct
12 Correct 2 ms 6480 KB Output is correct
13 Correct 2 ms 6480 KB Output is correct
14 Correct 2 ms 6480 KB Output is correct
15 Correct 2 ms 6480 KB Output is correct
16 Correct 1 ms 6480 KB Output is correct
17 Correct 1 ms 6480 KB Output is correct
18 Correct 1 ms 6480 KB Output is correct
19 Correct 1 ms 6480 KB Output is correct
20 Correct 1 ms 6480 KB Output is correct
21 Correct 2 ms 6480 KB Output is correct
22 Correct 1 ms 6480 KB Output is correct
23 Correct 2 ms 6508 KB Output is correct
24 Correct 2 ms 6480 KB Output is correct
25 Correct 1 ms 6480 KB Output is correct
26 Correct 23 ms 6832 KB Output is correct
27 Correct 25 ms 6824 KB Output is correct
28 Correct 17 ms 6824 KB Output is correct
29 Correct 2 ms 6480 KB Output is correct
30 Correct 27 ms 6828 KB Output is correct
31 Correct 22 ms 6904 KB Output is correct
32 Correct 11 ms 6736 KB Output is correct
33 Correct 6 ms 6480 KB Output is correct
34 Correct 26 ms 6736 KB Output is correct
35 Correct 26 ms 6836 KB Output is correct
36 Correct 30 ms 6736 KB Output is correct
37 Correct 22 ms 6848 KB Output is correct
38 Correct 26 ms 6856 KB Output is correct
39 Correct 26 ms 7000 KB Output is correct
40 Correct 17 ms 7000 KB Output is correct
41 Execution timed out 5045 ms 56924 KB Time limit exceeded
42 Halted 0 ms 0 KB -