Submission #733891

#	Time	Username	Problem	Language	Result	Execution time	Memory
733891		vjudge1	City Mapping (NOI18_citymapping)	C++17	0 / 100	27 ms	468 KiB

citymapping

#include "citymapping.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
constexpr ll inf = 1e15;
void find_roads(int N, int Q, int A[], int B[], int W[]) {
    int x = -1;
    ll mx = 0;
    for (int i = 1; i < N; i++) {
		ll s = get_distance(1, i + 1);
		if (s > mx) {
			mx = s;
			x = i;
		}
	}
	vector<pair<ll, int>> p(N);
	for (int i = 0; i < N; i++) {
		p[i] = {get_distance(x + 1, i + 1), i};
	}
	sort(p.begin(), p.end());
	vector<int> v{x}, cnt(N);
	for (int i = 1; i < N; i++) {
		int u = p[i].second;
		ll mn = inf;
		int y = -1;
		for (int x : v) {
			ll s = get_distance(u + 1, x + 1);
			if (s < mn) {
				mn = s;
				y = x;
			}
		}
		A[i - 1] = u + 1;
		B[i - 1] = y + 1;
		W[i - 1] = mn;
		cnt[u]++;
		if (++cnt[y] == 3) {
			v.erase(find(v.begin(), v.end(), y));
		}
		v.push_back(u);
	}
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 13
• Subtask 4: 0 / 19
• Subtask 5: 0 / 43