Submission #96571

#	Time	Username	Problem	Language	Result	Execution time	Memory
96571		rubenvd	Towns (IOI15_towns)	C++14	25 / 100	25 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 )
		for( int j = 0; j < n; ++j )
			m[i][j] = -1;

	int maxi = -1;
	for( int i = 0; i < n; ++i ){
		int disI = getDistance(i, 0);
		m[0][i] = m[i][0] = disI;
		if( disI > maxi ){
			maxi = disI;
			s = i;
		}
	}

	for( int i = 0; i < n; ++i ){
		int disT = getDistance(s, i);
		m[s][i] = m[i][s] = disT;
		if( disT > maxd ){
			maxd = disT;
			t = i;
		}
	}

	int mini = 1e7+5;
	for( int i = 0; i < n; ++i ){
		if( i != s && i != t ){
			int z = (getDistance(i, t) - m[i][s] - maxd)/-2;
			int x = maxd - z, y = m[i][s] - z; 

			mini = min(mini, max(x, z));
		}
	}

	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:39:22: warning: unused variable 'y' [-Wunused-variable]
    int x = maxd - z, y = m[i][s] - z; 
                      ^
towns.cpp:10:29: warning: unused parameter 'sub' [-Wunused-parameter]
 int hubDistance( int n, int sub ){
                             ^~~
towns.cpp:37:19: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if( i != s && i != t ){
                 ~~^~~~
towns.cpp:11:15: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int m[n][n], s, t, maxd = -1;
               ^

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