Submission #410976

#	Time	Username	Problem	Language	Result	Execution time	Memory
410976		ja_kingy	Towns (IOI15_towns)	C++14	0 / 100	25 ms	972 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>
using namespace std;

int hubDistance(int n, int sub) {
	vector<int> d0(n), d1(n);
	int mx = 0, R = 1e9;
	for (int i = 1; i < n; ++i) {
		d0[i] = getDistance(0, i);
		if (d0[i] > d0[mx]) mx = i;
	}
	d1[0] = d0[mx];
	int d = 0;
	for (int i = 1; i < n; ++i) if (i != mx) {
		d1[i] = getDistance(mx, i);
		d = max(d, d1[i]);
	}
	map<int, vector<int>> groups;
	for (int i = 1; i < n; ++i) {
		if (i != mx) groups[(d1[i] - d0[i] + d0[mx]) / 2].push_back(i);
	}
	int hub = 0;
	for (auto g: groups) {
		R = min(R, max(g.first, d-g.first));
		// cerr << g.first << ' ' << g.second.size() << endl;
	}
	//cerr << R << endl;
	return R;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:22:6: warning: unused variable 'hub' [-Wunused-variable]
   22 |  int hub = 0;
      |      ^~~
towns.cpp:5:28: warning: unused parameter 'sub' [-Wunused-parameter]
    5 | int hubDistance(int n, int sub) {
      |                        ~~~~^~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 39