Submission #399689

#	Time	Username	Problem	Language	Result	Execution time	Memory
399689		peuch	Towns (IOI15_towns)	C++17	25 / 100	26 ms	1116 KiB

towns

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

const int MAXN = 1e6;

int dist[3][MAXN];

int hubDistance(int N, int sub) {
	int p1 = 0, p2 = 0;
	int maxi = 0;
	for(int i = 0; i < N; i++){
		int aux = getDistance(0, i);
		if(aux > maxi) p1 = i, maxi = aux;
	}
	maxi = 0;
	for(int i = 0; i < N; i++){
		dist[0][i] = getDistance(p1, i);
		if(dist[0][i] > maxi) maxi = dist[0][i], p2 = i;
	}
	for(int i = 0; i < N; i++)
		dist[1][i] = getDistance(p2, i);
	
	int diam = dist[0][p2];
	int ans = MAXN;
	for(int i = 0; i < N; i++){
		int x = (diam + dist[0][i] - dist[1][i]) / 2;
		ans = min(ans, max(x, diam - x));
	}
	return ans;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:9:28: warning: unused parameter 'sub' [-Wunused-parameter]
    9 | 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