Submission #434011

#	Time	Username	Problem	Language	Result	Execution time	Memory
434011		qwerasdfzxcl	Towns (IOI15_towns)	C++14	25 / 100	24 ms	460 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>

using namespace std;
int dist[111][111], n;

int hubDistance(int N, int sub) {
	n = N;
	for (int i=0;i<n;i++) fill(dist[i], dist[i]+n, 0);
    for (int i=1;i<n;i++) dist[0][i] = getDistance(0, i);
    int a = 0, b = max_element(dist[0], dist[0]+n) - dist[0];
    for (int i=1;i<n;i++) if (i!=b) dist[b][i] = getDistance(b, i);
    set<int> st;
    for (int i=1;i<n;i++) if (i!=b){
        st.insert(dist[a][b]-dist[b][i]+(dist[a][i]+dist[b][i]-dist[a][b])/2);
    }
    int ret = dist[a][b];
    for (auto &x:st){
        int tmp = max(x, dist[a][b]-x);
        for (int i=1;i<n;i++){
            int y = dist[a][b]-dist[b][i]+(dist[a][i]+dist[b][i]-dist[a][b])/2;
            int z = dist[a][b] - y;
            if (y<=x) tmp = max(tmp, dist[a][i]-y+(x-y));
            else tmp = max(tmp, dist[b][i]-z+(dist[a][b]-x-z));
            //printf("%d ", tmp);
        }
        //printf("\n");
        ret = min(ret, tmp);
    }
    return ret;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:11:52: warning: conversion from 'long int' to 'int' may change value [-Wconversion]
   11 |     int a = 0, b = max_element(dist[0], dist[0]+n) - dist[0];
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
towns.cpp:7:28: warning: unused parameter 'sub' [-Wunused-parameter]
    7 | int hubDistance(int N, int sub) {
      |                        ~~~~^~~

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