Submission #422773

#	Time	Username	Problem	Language	Result	Execution time	Memory
422773		vanic	Towns (IOI15_towns)	C++14	0 / 100	20 ms	396 KiB

towns

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


using namespace std;

const int maxn=120;

int dist[maxn][maxn];


int hubDistance(int n, int sub) {
	int ind=0;
	int maksi=0;
	for(int i=1; i<n; i++){
		dist[0][i]=dist[i][0]=getDistance(0, i);
		if(maksi<dist[0][i]){
			maksi=dist[0][i];
			ind=i;
		}
	}
	int ind1=0;
	maksi=0;
	for(int i=0; i<n; i++){
		if(ind==i){
			continue;
		}
		if(!dist[i][ind]){
			dist[i][ind]=dist[ind][i]=getDistance(ind, i);
		}
		if(dist[i][ind]>maksi){
			maksi=dist[i][ind];
			ind1=i;
		}
	}
	swap(ind, ind1);
	for(int i=0; i<n; i++){
		if(ind==i){
			continue;
		}
		if(!dist[i][ind]){
			dist[i][ind]=dist[ind][i]=getDistance(ind, i);
		}
	}
//	cout << ind << ' ' << ind1 << endl;
//	cout << maksi << endl;
	int mini=1e9;
	int br;
	for(int i=0; i<n; i++){
		if(i==ind  || i==ind1){
			continue;
		}
//		cout << i << ' ' << dist[i][ind] << ' ' << dist[i][ind1] << endl;
		br=(dist[i][ind]+dist[i][ind1]-maksi)/2;
		br=max(dist[i][ind], dist[i][ind1])-br;
//		cout << br << endl;
		mini=min(mini, br);
	}
	return mini;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:13:28: warning: unused parameter 'sub' [-Wunused-parameter]
   13 | 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