Submission #96564

#	Time	Username	Problem	Language	Result	Execution time	Memory
96564		rubenvd	Towns (IOI15_towns)	C++14	13 / 100	20 ms	632 KiB

towns

#include <bits/stdc++.h>
#include "towns.h"
using namespace std;
/*int dis[110][110];

int getDistance( int i, int j ){
	return dis[i][j];
}*/

int hubDistance( int n, int sub ){
	int m[n][n], s, t, maxd = -1;
	for( int i = 0; i < n; ++i ){
		m[i][i] = 0;
		for( int j = i+1; j < n; ++j ){
			m[i][j] = getDistance(i,j);
			m[j][i] = m[i][j];

			if( m[i][j] > maxd ){
				s = i;
				t = j;
				maxd = m[i][j];
			}
		}
	}

	int mini = 1e7+5;
	vector<int> va, vz;
	for( int i = 0; i < n; ++i ){
		if( i != s && i != t ){
			int z = (m[i][t] - m[i][s] - maxd)/-2;
			int x = maxd - z, y = m[i][s] - z; 
			//cout << s << " <-> " << t << " <-> " << i << "   " << z << " " << y << " " << x << endl;
			
			va.push_back(x); vz.push_back(z);
			mini = min(mini, max(x, z));
		}
	}

	int xtree = 0, ytree = 0, extree = 0;
	for( int i = 0; i < va.size(); ++i ){
		if( max(va[i], vz[i]) == mini )
			extree++;
		else if( max(va[i], vz[i]) > mini )
			ytree++;
		else
			xtree++;

	}
	//cout << xtree << " " << ytree << " " << extree << endl;
	if( extree > floor((n+1)*3/2) || xtree > floor((n+1)/2) || ytree > floor((n+1)/2) )
		return -mini;
	else
		return mini;
}

/*int main(){
	int sb, tc, n;
	cin >> sb >> tc >> n;

	for( int i = 0; i < n; ++i ){
		for( int j = 0; j < n; ++j ){
			cin >> dis[i][j];
		}
	}
	cout << hubDistance(n, sb) << endl;
	return 0;
}*/

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:31:22: warning: unused variable 'y' [-Wunused-variable]
    int x = maxd - z, y = m[i][s] - z; 
                      ^
towns.cpp:40:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for( int i = 0; i < va.size(); ++i ){
                  ~~^~~~~~~~~~~
towns.cpp:10:29: warning: unused parameter 'sub' [-Wunused-parameter]
 int hubDistance( int n, int sub ){
                             ^~~
towns.cpp:29:9: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if( i != s && i != t ){
       ~~^~~~
towns.cpp:29:19: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if( i != s && i != t ){
                 ~~^~~~

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