Submission #1023179

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1023179	2024-07-14 12:15:52	NeroZein	Fountain Parks (IOI21_parks)	C++17	30 / 100	398 ms	47472 KiB

parks

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#include "parks.h"
#include <bits/stdc++.h>
using namespace std; 
const int N = 2e5 + 5;
int p[N];
int sz[N];
vector<pair<int, int>> inY[N];
int get(int v) {
  return p[v] = (p[v] == v ? v : get(p[v]));
}
void unite(int u, int v) {
  u = get(u);
  v = get(v);
  if (sz[u] > sz[v]) swap(u, v);
  p[u] = v;
  sz[v] += sz[u];
}
int construct_roads(vector<int> vx, vector<int> vy) {
  int n = (int) vx.size();
  map<pair<int, int>, int> mp;
  for (int i = 0; i < n; ++i) {
    p[i] = i;
    sz[i] = 1;
    mp[{vx[i], vy[i]}] = i;
    inY[vy[i]].emplace_back(vx[i], i); 
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30