Submission #698767

#	Time	Username	Problem	Language	Result	Execution time	Memory
698767		vjudge1	Circle selection (APIO18_circle_selection)	C++17	7 / 100	3089 ms	32204 KiB

circle_selection

#include "bits/stdc++.h"
#define ll long long
#define pb push_back
#define endl '\n'
#define fi first
#define sec second

using namespace std;
ll dis(pair<ll,ll>p1,pair<ll,ll>p2)
{
  ll a=(p1.first-p2.first) , b=(p1.second-p2.second);
  return (a*a)+(b*b);
}
bool sorting1 (pair<ll,ll>a,pair<ll,ll>b)
{
  if(a.first!=b.first)
    return (a.first>b.first);
  return (a.second<b.second);
}
bool sorting2 (pair<pair<ll,ll>,pair<ll,ll>>a,pair<pair<ll,ll>,pair<ll,ll>>b)
{
  if(a.fi.fi!=b.fi.fi)
    return (a.fi.fi>b.fi.fi);
  return (a.sec.sec<b.sec.sec);
}

signed main () {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    ll n;
    cin>>n;
    bool m=1;
    vector<pair<ll,pair<ll,ll>>>inp(n);
    for(int i=0;i<n;i++)
    {
      ll x,y,z;
      cin>>x>>y>>z;
      if(y)m=0;
      inp[i]={x,{y,z}};
    }

    if(!m)
    {
    vector<pair<ll,ll>>v,c;
    for(int i=0;i<n;i++)
    {
      ll x=inp[i].fi,y=inp[i].sec.fi,r=inp[i].sec.sec;
      c.pb({x,y});
      v.pb({r,i});
    }
    sort(v.begin(),v.end(),sorting1);
    ll ans[n]={};
    for(int i=0;i<n;i++)
    {
      if(ans[v[i].second])continue;
      for(int j=i;j<n;j++)
      {
        if(ans[v[j].second])continue;

        if(dis(c[v[i].second],c[v[j].second])<=((v[i].first+v[j].first)*(v[i].first+v[j].first)) )
          ans[v[j].second]=v[i].second+1;
      }
    }
    for(int i=0;i<n;i++)
      cout<<ans[i]<<' ';
    }

    else
    {

    vector<pair<pair<ll,ll>,pair<ll,ll>>>v,c;

    for(int i=0;i<n;i++)
    {
      ll x=inp[i].fi,y=inp[i].sec.fi,r=inp[i].sec.sec;
      c.pb({{x-r,x+r},{r,i}});
      v.pb({{r,i},{x-r,x+r}});
    }
    sort(v.begin(),v.end(),sorting2);
    sort(c.begin(),c.end());

    ll ans[n]={};
    for(int i=0;i<n;i++)
    {
      if(ans[v[i].fi.sec])continue;
      swap(v[i].sec,v[i].fi);
      auto u=lower_bound(c.begin(),c.end(),v[i]);
      for(ll j=u-c.begin();j<n;j++)
      {
        if(v[i].fi.sec<c[j].fi.fi)break;
        if(ans[c[j].sec.sec])continue;
        ans[c[j].sec.sec]=v[i].sec.sec+1;
      }
    }
    for(int i=0;i<n;i++)
      cout<<ans[i]<<' ';

    }

    return 0;
}
/*
11
9 9 2
13 2 1
11 8 2
3 3 2
3 12 1
12 14 1
9 8 5
2 8 2
5 2 1
14 4 2
14 14 1

4
0 0 4
1 0 1
2 0 3
7 0 1



*/

Compilation message (stderr)

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:77:22: warning: unused variable 'y' [-Wunused-variable]
   77 |       ll x=inp[i].fi,y=inp[i].sec.fi,r=inp[i].sec.sec;
      |                      ^

• Subtask 1: 7 / 7
• Subtask 2: 0 / 12
• Subtask 3: 0 / 15
• Subtask 4: 0 / 23
• Subtask 5: 0 / 30
• Subtask 6: 0 / 13