oj.uz

Submission #1113229

# Submission time Handle Problem Language Result Execution time Memory
1113229 2024-11-16T06:03:49 Z ttamx Growing Vegetables is Fun 5 (JOI24_vegetables5) C++17
30 / 100
 5000 ms 85792 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],d1[3*N],d2[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 Stack{
    using P = pair<Info,int>;
    vector<P> s;
    vector<Info> p;
    bool empty(){return s.empty();}
    P front(){return s.back();}
    P back(){return s.back();}
    void push_front(Info x,int v){
        s.emplace_back(x,v);
        if(p.empty())p.emplace_back(x);
        else p.emplace_back(x+p.back());
    }
    void push_back(Info x,int v){
        s.emplace_back(x,v);
        if(p.empty())p.emplace_back(x);
        else p.emplace_back(p.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_back(){s.pop_back();p.pop_back();}
    void pop_front(){s.pop_back();p.pop_back();}
    Info query(){return p.empty()?Info::unit():p.back();}
};

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;
    Stack q1,q3;
    Deque q2;
    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){
    calc(b,d1,k);
    calc(c,d2,k);
    for(int i=n;i<2*n;i++){
        if((d1[i]&&d2[i+n])||(d2[i]&&d1[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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 448 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 504 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 2 ms 336 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 448 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 504 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 2 ms 336 KB Output is correct
26 Correct 26 ms 972 KB Output is correct
27 Correct 29 ms 876 KB Output is correct
28 Correct 24 ms 920 KB Output is correct
29 Correct 2 ms 336 KB Output is correct
30 Correct 30 ms 956 KB Output is correct
31 Correct 28 ms 1072 KB Output is correct
32 Correct 12 ms 568 KB Output is correct
33 Correct 6 ms 592 KB Output is correct
34 Correct 33 ms 976 KB Output is correct
35 Correct 25 ms 940 KB Output is correct
36 Correct 31 ms 984 KB Output is correct
37 Correct 24 ms 1024 KB Output is correct
38 Correct 25 ms 1016 KB Output is correct
39 Correct 25 ms 960 KB Output is correct
40 Correct 26 ms 912 KB Output is correct

Subtask #4
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 4967 ms 79424 KB Output is correct
2 Execution timed out 5019 ms 85792 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 448 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 504 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 2 ms 336 KB Output is correct
26 Correct 26 ms 972 KB Output is correct
27 Correct 29 ms 876 KB Output is correct
28 Correct 24 ms 920 KB Output is correct
29 Correct 2 ms 336 KB Output is correct
30 Correct 30 ms 956 KB Output is correct
31 Correct 28 ms 1072 KB Output is correct
32 Correct 12 ms 568 KB Output is correct
33 Correct 6 ms 592 KB Output is correct
34 Correct 33 ms 976 KB Output is correct
35 Correct 25 ms 940 KB Output is correct
36 Correct 31 ms 984 KB Output is correct
37 Correct 24 ms 1024 KB Output is correct
38 Correct 25 ms 1016 KB Output is correct
39 Correct 25 ms 960 KB Output is correct
40 Correct 26 ms 912 KB Output is correct
41 Correct 4967 ms 79424 KB Output is correct
42 Execution timed out 5019 ms 85792 KB Time limit exceeded
43 Halted 0 ms 0 KB -