Submission #733863

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
733863	2023-05-01 11:19:58	vjudge1	City Mapping (NOI18_citymapping)	C++17	25 / 100	120 ms	8776 KiB

citymapping

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#include "citymapping.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void find_roads(int N, int Q, int A[], int B[], int W[]) {
  vector<tuple<ll, int, int>> T;
  for (int i = 0; i < N; i++) {
    for (int j = i + 1; j < N; j++) {
      T.emplace_back(get_distance(i + 1, j + 1), i, j);
    }
  }
  sort(T.begin(), T.end());
  vector<int> par(N);
  iota(par.begin(), par.end(), 0);
  function<int(int)> find = [&](int x) {
    return x == par[x] ? x : par[x] = find(par[x]);
  };
  int p = 0;
  for (int i = 0; i < T.size(); i++) {
    auto [z, x, y] = T[i];
    if (find(x) != find(y)) {
      A[p] = x + 1;
      B[p] = y + 1;
      W[p] = z;
      p++;
      par[find(x)] = find(y);
    }
  }
}
 
 
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Compilation message (stderr)

citymapping.cpp: In function 'void find_roads(int, int, int*, int*, int*)':
citymapping.cpp:19:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<long long int, int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |  for (int i = 0; i < T.size(); i++) {
      |                  ~~^~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 0 / 13
• Subtask 4: 0 / 19
• Subtask 5: 0 / 43