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  1.     #include <bits/stdc++.h>
  2.     #define ll long long
  3.     using namespace std;
  4.     struct DSU{   
  5.     vector<int>parent,gsize;
  6.     int comps;
  7.     int mxcmp;
  8.     DSU(int maxi){
  9.         parent=gsize=vector<int>(maxi+5);
  10.         comps=maxi;
  11.         mxcmp=1;
  12.         for(int i=0;i<=maxi;i++){
  13.             parent[i]=i,gsize[i]=1;
  14.         }
  15.         }
  16.         int find_leader(int node){
  17.             return parent[node]=(parent[node]==node?node:find_leader(parent[node]));
  18.         }
  19.         bool samel(int node1,int node2){
  20.             return find_leader(node1)==find_leader(node2);
  21.         }
  22.         void union_set(int node1,int node2){
  23.             int u=find_leader(node1),v=find_leader(node2);
  24.             if(u==v)return;
  25.             if(gsize[u]<gsize[v])swap(u,v);
  26.             gsize[u]+=gsize[v],parent[v]=u;
  27.             comps--;
  28.             mxcmp=max(gsize[u],mxcmp);
  29.         }
  30.         int largest_comp(){
  31.             return mxcmp;
  32.         }
  33.     };
  34.     int main(){
  35.         int n,m;
  36.         cin>>n>>m;
  37.         DSU dsu(n);
  38.         for(int i=0;i<m;i++){
  39.             int x,y;
  40.             cin>>x>>y;
  41.             int sz=0,cnt=0;
  42.             dsu.union_set(x,y);
  43.             cout<<dsu.comps<<" "<<dsu.largest_comp()<<"\n";
  44.         }
  45.         return 0;
  46.     }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/IaRiGe
language:
C++14 (gcc 8.3)
created:
8 hours ago
visibility:
public

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