Submission #1014724

#	Time	Username	Problem	Language	Result	Execution time	Memory
1014724		MarwenElarbi	Towns (IOI15_towns)	C++17	25 / 100	14 ms	1112 KiB

towns

#include <bits/stdc++.h>
#include "towns.h"
using namespace std;
int getDistance(int i, int j);
int hubDistance(int N, int sub) {
    long long mx=0;
    int one;
    for (int i = 1; i < N; ++i)
    {
        long long cur=getDistance(0,i);
        if(cur>mx){
            mx=cur;
            one=i;
        }
    }
    vector<long long> a(N,0);
    int two;
    mx=0;
    for (int i = 0; i < N; ++i)
    {
        if(i==one) continue;
        a[i]=getDistance(one,i);
        if(a[i]>mx){
            mx=a[i];
            two=i;
        }
    }
    vector<long long> b(N,0);
    for (int i = 0; i < N; ++i)
    {
        if(i==two) continue;
        b[i]=getDistance(two,i);
    }
    long long d=a[two];
    long long res=1e18;
    for (int i = 0; i < N; ++i)
    {
        if(i==one||i==two) continue;
        long long x=abs(a[i]-b[i]);
        long long r=0;
        r=max(r,(x+d)/2);
        r=max(r,d-(d+x)/2);
        res=min(res,r);
    }
    return res;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:45:12: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   45 |     return res;
      |            ^~~
towns.cpp:5:28: warning: unused parameter 'sub' [-Wunused-parameter]
    5 | int hubDistance(int N, int sub) {
      |                        ~~~~^~~
towns.cpp:38:21: warning: 'two' may be used uninitialized in this function [-Wmaybe-uninitialized]
   38 |         if(i==one||i==two) continue;
      |                    ~^~~~~
towns.cpp:22:25: warning: 'one' may be used uninitialized in this function [-Wmaybe-uninitialized]
   22 |         a[i]=getDistance(one,i);
      |              ~~~~~~~~~~~^~~~~~~

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