Submission #300195

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
300195	2020-09-17 00:15:20	VladaMG98	Connecting Supertrees (IOI20_supertrees)	C++17	21 / 100	259 ms	22232 KiB

supertrees

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#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
struct dsu {
  int n;
  vector<int> parent, rank;
  dsu(int _n) {
    n = _n;
    parent.resize(n);
    rank.resize(n);
    for (int i = 0; i < n; i++) {
      parent[i] = i;
      rank[i] = 1;
    }
  }
  int get(int x) {
    if (parent[x] == x) return x;
    return parent[x] = get(parent[x]);
  }
  bool unite(int x, int y) {
    x = get(x), y = get(y);
    if (x == y) return false;
    if (rank[x] < rank[y]) swap(x, y);
    parent[y] = x;
    rank[x] += rank[y];
    return true;
  }
  vector<int> all_roots() {
    set<int> s;
 
 
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