제출 #673854

#제출 시각아이디문제언어결과실행 시간메모리
673854Dan4Life원 고르기 (APIO18_circle_selection)C++17
7 / 100
3095 ms39628 KiB
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define int long long 
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
using ll = long long;
const int maxn = (int)3e5+10;
const ll LINF = (ll)2e18;
struct circle{
	int x, y, r, i;
};

int n, elim[maxn];
vector<circle> v;

bool intersects(int i, int j){
	int rr = v[i].r+v[j].r;
	int xx = v[i].x-v[j].x;
	int yy = v[i].y-v[j].y;
	return rr*rr>=xx*xx+yy*yy;
}

int32_t main(){
	ios::sync_with_stdio(false); cin.tie(0);
	cin >> n; v.resize(n); set<pair<int,int>> S;
	for(int i = 0; i < n; i++){
		cin >> v[i].x >> v[i].y >> v[i].r;
		v[i].i=i; elim[i]=-1; S.insert({v[i].x, i});
	}
	sort(all(v), [&](circle a, circle b){
		if(a.r!=b.r) return a.r > b.r;
		return a.i < b.i;
	});
	for(int i = 0; i < n; i++){
		if(elim[v[i].i]!=-1) continue;
		for(int j = i; j < n; j++)
			if(intersects(i,j) and elim[v[j].i]==-1) elim[v[j].i]=v[i].i;
	}
	for(int i = 0; i < n; i++) cout << ++elim[i] << " ";
}
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