Submission #828584

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
8285842023-08-17 12:04:55jlallas384Parachute rings (IOI12_rings)C++17
100 / 100
1675 ms219616 KiB
#include <bits/stdc++.h>
using namespace std;
struct ufds{
vector<int> sz, par;
ufds(){}
ufds(int n): sz(n, 1), par(n){
iota(par.begin(), par.end(), 0);
}
int find(int a){
return par[a] == a ? a : par[a] = find(par[a]);
}
int unite(int a, int b){
a = find(a), b = find(b);
if(a == b) return 0;
if(sz[a] < sz[b]) swap(a, b);
par[b] = a;
sz[a] += sz[b];
return 1;
}
};
set<int> ans;
vector<vector<int>> g, tree;
vector<int> deg;
int n = 0;
ufds ds;
 
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