Submission #432772

#	Time	Username	Problem	Language	Result	Execution time	Memory
432772		daniel920712	Towns (IOI15_towns)	C++14	0 / 100	18 ms	420 KiB

towns

#include "towns.h"
#include <stdio.h>
#include <map>
#include <set>
using namespace std;
int all[205][205]={0};
map < int , int > tt;
int hubDistance(int N, int sub)
{
    int i,j,k,ans=2e9,a,b,c,x,y,z,now=0,aa,bb;
    for(i=0;i<N;i++)
    {
        for(j=i+1;j<N;j++)
        {
            all[i][j]=all[j][i]=getDistance(i,j);
            if(all[i][j]>now)
            {
                now=all[i][j];
                aa=i;
                bb=j;
            }
        }
    }
    i=aa;
    j=bb;
    for(k=0;k<N;k++)
    {
        if(i==k) continue;
        if(j==k) continue;
        a=all[i][j];
        b=all[i][k];
        c=all[j][k];
        z=(a+b+c)/2-a;
        y=(a+b+c)/2-b;
        x=(a+b+c)/2-c;
        tt[x]=max(tt[x],max(max(x,y),z));

    }
    for(auto k:tt)
    {

        ans=min(ans,a-k.first);
    }


	return ans;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:39:14: warning: declaration of 'k' shadows a previous local [-Wshadow]
   39 |     for(auto k:tt)
      |              ^
towns.cpp:10:13: note: shadowed declaration is here
   10 |     int i,j,k,ans=2e9,a,b,c,x,y,z,now=0,aa,bb;
      |             ^
towns.cpp:8:28: warning: unused parameter 'sub' [-Wunused-parameter]
    8 | int hubDistance(int N, int sub)
      |                        ~~~~^~~
towns.cpp:42:22: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
   42 |         ans=min(ans,a-k.first);
      |                     ~^~~~~~~~
towns.cpp:30:10: warning: 'bb' may be used uninitialized in this function [-Wmaybe-uninitialized]
   30 |         a=all[i][j];
      |         ~^~~~~~~~~~
towns.cpp:30:10: warning: 'aa' may be used uninitialized in this function [-Wmaybe-uninitialized]

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