Submission #127337

#	Time	Username	Problem	Language	Result	Execution time	Memory
127337		kingfran1907	Towns (IOI15_towns)	C++14	25 / 100	68 ms	4988 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>

using namespace std;
const int maxn = 120;
const int maxm = 1e6+10;
const int inf = 0x3f3f3f3f;

int qs[maxn][maxn];
int sol[maxm];
int query(int a, int b) {
	if (a > b) swap(a, b);
	if (qs[a][b] == -1) qs[a][b] = getDistance(a, b);
	return qs[a][b];
}

int hubDistance(int n, int sub) {
	memset(qs, -1, sizeof qs);
	memset(sol, inf, sizeof sol);

	for (int i = 0; i < n; i++)
		qs[i][i] = 0;

	int a = 0, b = 0;
	for (int i = 0; i < n; i++)
		if (query(0, a) < query(0, i)) a = i;

	for (int i = 0; i < n; i++)
		if (query(a, i) > query(a, b)) b = i;

	
	int R = inf;
	for (int i = 0; i < n; i++) {
		int cd = (query(a, i) + query(b, i) - query(a, b)) / 2;
		int ad = query(a, i) - cd;
		int bd = query(b, i) - cd;

		sol[ad] = max({cd, ad, bd});
	}

	for (int i = 0; i < maxm; i++)
		R = min(R, sol[i]);
	return R;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:17:28: 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