Submission #982980

#	Time	Username	Problem	Language	Result	Execution time	Memory
982980		vjudge1	Circle selection (APIO18_circle_selection)	C++17	7 / 100	3099 ms	16812 KiB

circle_selection

#include <bits/stdc++.h>
#define int long long
using namespace std;
int n, i, j, k, x[300001], y[300001], r[300001], ans[300001];
bool u[300001];

long double dist(long double x1, long double y1, long double x2, long double y2) {
	return sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
}

bool inter(int i, int j) {
	return r[i] + r[j] >= dist(x[i], y[i], x[j], y[j]);
}

signed main() {
	cin.tie(0)->sync_with_stdio(0);
	#ifdef LOCAL
	freopen("input.txt", "r", stdin);
	#endif
	cin >> n;
	for (i = 1; i <= n; i++) {
		cin >> x[i] >> y[i] >> r[i];
	}
	for (i = 1; i <= n; i++) {
		k = 0;
		for (j = 1; j <= n; j++) {
			if (r[j] > r[k] && !u[j]) k = j;
		}
		u[k] = 1;
		ans[k] = k;
		for (j = 1; j <= n; j++) {
			if (u[j]) continue;
			if (inter(k, j)) {
				u[j] = 1;
				ans[j] = k;
			}
		}
	}
	for (i = 1; i <= n; i++) cout << ans[i] << " ";
}

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