Submission #420177

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Source Code Expand

#include <algorithm>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <sstream>
#include <functional>
#include <map>
#include <string>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <list>
#include <numeric>
using namespace std;
const double PI = 3.14159265358979323846;
const double EPS = 1e-12;
const int INF = 1<<25;
typedef pair<int,int> P;
typedef long long ll;
typedef unsigned long long ull;
#define MAX_N 100000
struct UF {
	int par[MAX_N],rank[MAX_N];
	
	void init(int n){
		for(int i = 0; i < n; i++){
			par[i] = i;
			rank[i] = 0;
		}
	}
	
	int find(int x){
		if(par[x] == x){
			return x;
		}else{
			return par[x] = find(par[x]);
		}
	}
	
	void unite(int x, int y){
		x = find(x);
		y = find(y);
		if(x == y) return;
		
		if(rank[x] < rank[y]){
			par[x] = y;
		}else{
			par[y] = par[x];
			if(rank[x] == rank[y]) rank[y]++;
		}
	}
	
	bool same(int x, int y){
		return find(x) == find(y);
	}
};


int main(){
	int n, q;
	cin>>n>>q;
	UF uf;
	uf.init(n);
	for(int i = 0; i < q; i++){
		int p, a, b;
		cin>>p>>a>>b;
		if(p==0) uf.unite(a, b);
		else {
			cout<<(uf.same(a, b)?"Yes":"No")<<endl;
		}
	}
	return 0;
}

Submission Info

Judge Result