Submission #102717

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
102717	2019-03-27 08:19:07	wxh010910	Towns (IOI15_towns)	C++17	100 / 100	33 ms	1144 KiB

towns

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#include <bits/stdc++.h>
#include "towns.h"
using namespace std;
int hubDistance(int N, int sub) {
  vector<vector<int>> dist(2, vector<int>(N, 0));
  int root = 0, left = 0, right = 0;
  for (int i = 0; i < N; ++i) {
    if (i != root) {
      dist[0][i] = getDistance(root, i);
      if (dist[0][i] > dist[0][left]) {
        left = i;
      }
    }
  }
  for (int i = 0; i < N; ++i) {
    if (i != left) {
      dist[1][i] = getDistance(left, i);
      if (dist[1][i] > dist[1][right]) {
        right = i;
      }
    }
  }
  int limit = (dist[0][left] - dist[0][right] + dist[1][right]) >> 1;
  vector<int> from(N, 0), all;
  for (int i = 0; i < N; ++i) {
    from[i] = (dist[1][i] - dist[0][i] + dist[0][left]) >> 1;
    if (from[i] <= limit) {
      all.push_back(from[i]);
 
 
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Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:6:28: warning: unused parameter 'sub' [-Wunused-parameter]
 int hubDistance(int N, int sub) {
                            ^~~

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