Submission #129539

#	Time	Username	Problem	Language	Result	Execution time	Memory
129539		johutha	Towns (IOI15_towns)	C++14	25 / 100	21 ms	1016 KiB

towns

#include "towns.h"
#include <vector>
#include <iostream>
#include <algorithm>

using namespace std;

int hubDistance(int n, int sub) {
	int mmax = -1;
	int diabeg = -1;
	for (int i = 1; i < n; i++)
	{
		int q = getDistance(0, i);
		if (q > mmax)
		{
			mmax = q;
			diabeg = i;
		}
	}
	vector<int> fbeg(n);
	int diaend = -1;
	mmax = -1;
	for (int i = 0; i < n; i++)
	{
		if (i == diabeg) continue;
		fbeg[i] = getDistance(diabeg, i);
		if (fbeg[i] > mmax)
		{
			mmax = fbeg[i];
			diaend = i;
		}
	}
	vector<int> fend(n);
	fend[diabeg] = fbeg[diaend];
	for (int i = 0; i < n; i++)
	{
		if (i == diabeg || i == diaend) continue;
		fend[i] = getDistance(diaend, i);
	}

	int r = 100000000;
	int dia = fbeg[diaend];

	for (int i = 0; i < n; i++)
	{
		int diff = abs(fbeg[i] - fend[i]);
		r = min(r, (dia + diff)/2);
	}
	return r;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:8:28: warning: unused parameter 'sub' [-Wunused-parameter]
 int hubDistance(int n, int sub) {
                            ^~~

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