제출 #872870

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
872870	2023-11-14 02:42:02	gggkik	통행료 (APIO13_toll)	C++14	16 / 100	10 ms	4188 KiB

toll

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
struct dsu{
    vector<int> par;
    void init(int x){
        par.resize(x+1);
        iota(par.begin(),par.end(),0);
    }
    int find(int x){
        return par[x]-x?par[x]=find(par[x]):x;
    }
    void u(int a,int b){
        a = find(a), b = find(b);
        if(a!=b) par[a] = b;
    }
};
vector<vector<int>> build_mst(int n, vector<vector<int>> edges){
    dsu uf; uf.init(n);
    sort(edges.begin(),edges.end(),[&](vector<int> &i, vector<int> &j){
        return i[2]<j[2];
    });
    vector<vector<int>> ret;
    for(auto &i : edges){
        int a = uf.find(i[0]), b = uf.find(i[1]);
        if(a!=b) {
            uf.u(a,b);
            ret.push_back(i);
        }
    }
 
 
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