Submission #252560

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
252560	2020-07-25 21:10:05	Kubin	Parachute rings (IOI12_rings)	C++17	0 / 100	21 ms	25472 KiB

rings

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#include <bits/stdc++.h>
using namespace std;
struct disjoint_sets
{
    vector<size_t> repr, rank;
    disjoint_sets(size_t n) : repr(n), rank(n)
    {
        for(size_t i = 0; i < n; i++)
            repr[i] = i;
    }
    size_t find(size_t v)
    {
        return v == repr[v] ? v : repr[v] = find(repr[v]);
    }
    bool unite(size_t u, size_t v)
    {
        if((u = repr[u]) == (v = repr[v]))
            return false;
        if(rank[u] > rank[v])
            swap(u, v);
        rank[v] += (rank[u] == rank[v]);
        repr[u] = v;
        return true;
    }
};
 
 
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