Submission #927309

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
927309	2024-02-14 17:04:57	TAhmed33	Swapping Cities (APIO20_swap)	C++17	100 / 100	312 ms	49944 KiB

swap

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#include <bits/stdc++.h>
using namespace std;
const int MAXN = 2e5 + 25;
int t[MAXN], n, m;
array <int, 3> edges[MAXN];
int deg[MAXN];
vector <int> sub[MAXN]; int par[MAXN];
bool ok[MAXN];
vector <array <int, 3>> times[MAXN];
int sum = 0;
void init (int N, int M, vector <int> u, vector <int> v, vector <int> w) {
  n = N; m = M;
  for (int i = 0; i < m; i++) edges[i] = {u[i], v[i], w[i]};
  for (int i = 0; i < m; i++) t[i] = i;
  sort(t, t + m, [&] (int &x, int &y) { return edges[x][2] < edges[y][2]; });
  for (int i = 0; i < n; i++) {
    sub[i].push_back(i);
    par[i] = i;
    times[i].push_back({-1, i, 0}); sum++;assert(sum <= 1e7);
  }
  for (int i = 0; i < m; i++) {
    int a = edges[t[i]][0], b = edges[t[i]][1];
    if (par[a] == par[b]) {
      if (ok[par[a]]) {
        deg[a]++; deg[b]++;
        continue;
      }
      ok[par[a]] = 1;
      for (auto j : sub[par[a]]) {
        times[j].push_back({i, par[a], 1}); sum++;assert(sum <= 1e7);
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 17 / 17
• Subtask 4: 20 / 20
• Subtask 5: 23 / 23
• Subtask 6: 27 / 27