Submission #223118

#	Time	Username	Problem	Language	Result	Execution time	Memory
223118		MODDI	Circle selection (APIO18_circle_selection)	C++14	0 / 100	746 ms	26592 KiB

circle_selection

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
using namespace std;
const int MAXN = 3e5;
int n;
vl end_arr;
bool vis[MAXN];
void print(){
	for(int i = 0; i < (int)end_arr.size(); i++)
		cout<<end_arr[i]<<" ";
		
	return;
}
class state{
	public:
		ll	x;
		ll y;
		double radius;
		int id;
};
vector<state> arr;
bool state_sort(state left, state right){
	if(left.radius < right.radius)
		return true;
	else if(left.radius == right.radius){
		if(left.id > right.id)
			return true;
		else
			return false;
	}
	else
		return false;
}
double get_dist(int x, int y, int x1, int y1){
	return sqrt((x - x1) * (x - x1) + (y - y1) * (y - y1));
}
void solve(){
	
	int at = 0;
	while(at < n){
		state current = arr[at];
		if(vis[current.id] == false){
			vis[current.id] = true;
			end_arr[current.id] = current.id + 1;
			for(int i = at + 1; i < n; i++){
				state check = arr[i];
				if(vis[check.id] == false){
					double dist = get_dist(current.x, current.y, check.x, check.y);
					if(dist <= current.radius + check.radius)
					{
						end_arr[check.id] = current.id + 1; 
						vis[check.id] = true;
					}
					else
						continue;
				}
				else
					continue;
			}
			at++;
		}
		else
			at++;
	}
	print();
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin>>n;
	memset(vis,false,sizeof(vis));
	end_arr.assign(n, 0);
	for(int i =0; i < n; i++){
		ll a, b;
		double c;
		cin>>a>>b>>c;
		arr.push_back({a,b,c, i});
	}
	sort(arr.begin(),arr.end(),state_sort);
	reverse(arr.begin(),arr.end());
	/*for(int i = 0; i < n; i++){
		cout<<arr[i].radius<<" "<<arr[i].id<<endl;
	}*/
	
	solve();
	return 0;
}

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