Submission #359785

#	Time	Username	Problem	Language	Result	Execution time	Memory
359785		kylych03	Towns (IOI15_towns)	C++14	0 / 100	23 ms	512 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>
//#include "grader.cpp"
using namespace std;
int d1[1000];
int d2[1000];
int hubDistance(int N, int sub) {
	int mx = -1e9, u1, x , u2;
	for(int i = 1; i < N; i++){
		x = getDistance(0,i);
		if(x > mx){
			mx = x;
			u1  = i;
			
		}
	}
	d1[0]=mx;
	mx = -1e9;
	
	for(int i = 1; i < N; i++){
		if( i== u1) continue;
		d1[i]=getDistance(u1,i);
		if(d1[i] > mx){
			mx = d1[i];
			u2 = i;	
		}
	}
	d2[u1] = mx;
	int diam = mx;
	int res = diam;
	
	for(int i = 0; i < N; i++){
		if( i== u1 || i==u2) continue;
		d2[i]=getDistance(u2,i);
		int len = (d1[i] + d2[i] - diam ) / 2;
		len = d2[i] - len;
		res = min(res, max(len, max(diam - len, (d1[i] + d2[i] - diam ) / 2)));
	}
	for(int i = 0 ; i < N ;i++)
		d1[i] = d2[i] = 0;
	return res;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:7:28: warning: unused parameter 'sub' [-Wunused-parameter]
    7 | int hubDistance(int N, int sub) {
      |                        ~~~~^~~
towns.cpp:28:9: warning: 'u1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   28 |  d2[u1] = mx;
      |  ~~~~~~~^~~~
towns.cpp:34:20: warning: 'u2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   34 |   d2[i]=getDistance(u2,i);
      |         ~~~~~~~~~~~^~~~~~

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