Submission #433339

#	Time	Username	Problem	Language	Result	Execution time	Memory
433339		timmyfeng	Towns (IOI15_towns)	C++17	25 / 100	25 ms	952 KiB

towns

#include <bits/stdc++.h>
using namespace std;

#include "towns.h"

const int N = 110;

int dist_0[N], dist_u[N], pos[N];

int hubDistance(int n, int subtask) {
    for (int i = 1; i < n; ++i) {
        dist_0[i] = getDistance(0, i);
    }

    int u = max_element(dist_0, dist_0 + n) - dist_0;
    dist_u[0] = dist_0[u];
    for (int i = 1; i < n; ++i) {
        dist_u[i] = u == i ? 0 : getDistance(u, i);
    }

    int v = max_element(dist_u, dist_u + n) - dist_u;
    pos[0] = (dist_0[u] - dist_0[v] + dist_u[v]) / 2;
    for (int i = 1; i < n; ++i) {
        pos[i] = min(pos[0], (dist_0[u] - dist_0[i] + dist_u[i]) / 2);
    }

    int ans = INT_MAX;
    for (int i = 0; i < n; ++i) {
        ans = min(ans, max(pos[i], dist_u[v] - pos[i]));
    }
    return ans;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:15:45: warning: conversion from 'long int' to 'int' may change value [-Wconversion]
   15 |     int u = max_element(dist_0, dist_0 + n) - dist_0;
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
towns.cpp:21:45: warning: conversion from 'long int' to 'int' may change value [-Wconversion]
   21 |     int v = max_element(dist_u, dist_u + n) - dist_u;
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
towns.cpp:10:28: warning: unused parameter 'subtask' [-Wunused-parameter]
   10 | int hubDistance(int n, int subtask) {
      |                        ~~~~^~~~~~~

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