제출 #652032

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
652032	2022-10-21 07:41:47	Vladth11	Stranded Far From Home (BOI22_island)	C++14	0 / 100	380 ms	29772 KiB

island

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#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
using namespace std;
const int NMAX = 200001;
class DSU{
public:
    int parent[NMAX], cnt[NMAX], suma[NMAX];
    vector <int> comp[NMAX];
    int root(int x){
        if(x == parent[x])
            return x;
        return parent[x] = root(parent[x]);
    }
    void merge(int a, int b){
        a = root(a);
        b = root(b);
        if(a == b)
            return;
        if(cnt[a] < cnt[b])
            swap(a, b);
        cnt[a] += cnt[b];
        parent[b] = a;
        suma[a] += suma[b];
        for(auto x : comp[b])
            comp[a].push_back(x);
        comp[b].clear();
    }
 
 
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