News Distribution

https://codeforces.com/contest/1167/problem/C

题解：并查集

/* *@Author: STZG *@Language: C++ */ #include <bits/stdc++.h> #include<iostream> #include<algorithm> #include<cstdlib> #include<cstring> #include<cstdio> #include<string> #include<vector> #include<bitset> #include<queue> #include<deque> #include<stack> #include<cmath> #include<list> #include<map> #include<set> //#define DEBUG #define RI register int #define endl "\n" using namespace std; typedef long long ll; //typedef __int128 lll; const int N=500000+10; const int M=100000+10; const int MOD=1e9+7; const double PI = acos(-1.0); const double EXP = 1E-8; const int INF = 0x3f3f3f3f; int t,n,m,k,p,l,r,u,v; int ans,cnt,flag,temp,sum; int pre[N],work[N]; char str; struct node{}; int find(int x){return pre[x]==x?x:pre[x]=find(pre[x]);} void marge(int x,int y){int fx=find(x);int fy=find(y);if(fx!=fy){if(work[fx]>work[fy]){pre[fy]=fx;work[fx]+=work[fy];}else{pre[fx]=fy;work[fy]+=work[fx];}} } int main() { #ifdef DEBUGfreopen("input.in", "r", stdin);//freopen("output.out", "w", stdout); #endif//ios::sync_with_stdio(false);//cin.tie(0);//cout.tie(0);//scanf("%d",&t);//while(t--){scanf("%d%d",&n,&m);for(int i=1;i<=n;i++)pre[i]=i,work[i]=1;for(int i=1;i<=m;i++){scanf("%d",&k);if(k==0)continue;scanf("%d",&u);for(int j=2;j<=k;j++){scanf("%d",&v);marge(u,v);}}for(int i=1;i<=n;i++){cout<<work[find(i)]<<" ";}//}#ifdef DEBUGprintf("Time cost : %lf s\n",(double)clock()/CLOCKS_PER_SEC); #endif//cout << "Hello world!" << endl;return 0; }

 

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