Submission #1036828

#	Time	Username	Problem	Language	Result	Execution time	Memory
1036828		alexdd	Road Construction (JOI21_road_construction)	C++17	5 / 100	10067 ms	212904 KiB

road_construction

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 5e9;
int n;
pair<int,int> v[250005];
pair<int,int> p[250005];

unordered_map<int,int> aib;
int qry(int poz)
{
    poz += 2000000005LL;
    int aux=0;
    for(int i=poz;i>0;i-=(i&(-i)))
        aux += aib[i];
    return aux;
}
void upd(int poz, int newv)
{
    poz += 2000000005LL;
    for(int i=poz;i<=10000000005LL;i+=(i&(-i)))
        aib[i] += newv;
}

int numara(int lim)
{
    aib.clear();
    for(int i=1;i<=n;i++)
    {
        p[i].first = v[i].first + v[i].second;
        p[i].second = v[i].first - v[i].second;
    }
    sort(p+1,p+1+n);
    int poz=1,cnt=0;
    for(int i=1;i<=n;i++)
    {
        while(p[i].first-p[poz].first>lim)
        {
            upd(p[poz].second,-1);
            poz++;
        }
        cnt += qry(p[i].second+lim) - qry(p[i].second-lim-1);
        upd(p[i].second,+1);
    }
    return cnt;
}
void afis(int lim)
{
    for(int i=1;i<=n;i++)
    {
        p[i].first = v[i].first + v[i].second;
        p[i].second = v[i].first - v[i].second;
    }
    sort(p+1,p+1+n);
    int poz=1;
    set<pair<int,int>> s;
    vector<int> sol;
    for(int i=1;i<=n;i++)
    {
        while(p[i].first-p[poz].first>lim)
        {
            s.erase({p[poz].second,poz});
            poz++;
        }
        auto it = s.lower_bound({p[i].second-lim,-1});
        while(it!=s.end())
        {
            if((*it).first > p[i].second+lim)
                break;
            sol.push_back(max(abs(p[i].first-p[(*it).second].first),abs(p[i].second-p[(*it).second].second)));
            it++;
        }
        s.insert({p[i].second,i});
    }
    sort(sol.begin(),sol.end());
    for(auto x:sol)
        cout<<x<<"\n";
}
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    int k;
    cin>>n>>k;
    for(int i=1;i<=n;i++)
    {
        cin>>v[i].first>>v[i].second;
    }
    int st=0,dr=INF,ans=0;
    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if(numara(mij)<=k)
        {
            ans=mij;
            st=mij+1;
        }
        else
            dr=mij-1;
    }
    afis(ans);
    for(int i=1;i<=k-numara(ans);i++)
        cout<<ans+1<<"\n";
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 20
• Subtask 5: 0 / 27
• Subtask 6: 0 / 35