제출 #963890

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
963890	2024-04-16 01:56:02	huutuan	Reconstruction Project (JOI22_reconstruction)	C++14	100 / 100	1316 ms	43232 KiB

reconstruction

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#include<bits/stdc++.h>
using namespace std;
#define int long long
struct DSURollback{
   vector<int> lab;
   int cc;
   void init(int n){
      lab.assign(n+1, -1);
      cc=n;
   }
   int find_set(int u){
      return lab[u]<0?u:lab[u]=find_set(lab[u]);
   }
   bool union_sets(int u, int v){
      u=find_set(u); v=find_set(v);
      if (u!=v){
         if (lab[u]>lab[v]) swap(u, v);
         lab[u]+=lab[v];
         lab[v]=u;
         --cc;
         return 1;
      }
      return 0;
   }
   bool same(int u, int v){
      return find_set(u)==find_set(v);
   }
 
 
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