Submission #210955

#	Time	Username	Problem	Language	Result	Execution time	Memory
210955		autumn_eel	Towns (IOI15_towns)	C++14	25 / 100	29 ms	1280 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
using namespace std;

int d[150][150];
int dist(int i,int j){
	if(i==j)return 0;
	if(i>j)swap(i,j);
	if(d[i][j]!=-1)return d[i][j];
	int x=getDistance(i,j);
	return d[i][j]=x;
}

int hubDistance(int N, int sub) {
	memset(d,-1,sizeof(d));
	int Max=0,s=-1;
	rep(i,N){
		if(Max<dist(0,i)){
			Max=dist(0,i);
			s=i;
		}
	}
	Max=0;int t=-1;
	rep(i,N){
		if(Max<dist(s,i)){
			Max=dist(s,i);
			t=i;
		}
	}
	int Min=INT_MAX;
	rep(i,N){
		int x=dist(s,i),y=dist(t,i);
		int z=(x+y-Max)/2;
		int a=x-z,b=y-z;
		Min=min(Min,max(a,b));
	}
	return Min;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:15:28: 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