hdu 1829 A Bug's Life

import java.util.Scanner;
 
 public class Main {
 
 	public static void main(String[] args) {
 		int m,n,i,t,c;
 		Scanner oo=new Scanner(System.in);
 		c=oo.nextInt();
 		for(t=1;t<=c;t++){
 			n=oo.nextInt();
 			m=oo.nextInt();
 			int same[]=new int[n+1];
 			int dif[]=new int[n+1];
 			for(i=0;i<=n;i++){
 				same[i]=i;
 				dif[i]=-1;
 			}
 			boolean flag=false;
 			int a,b,ua,ub;
 			for(i=0;i<m;i++){
 				a=oo.nextInt();
 				b=oo.nextInt();
 				if(flag==true){continue;}
 				while(a!=same[a]){a=same[a];}
 				while(b!=same[b]){b=same[b];}
 				if(a==b){
 					flag=true;
 				}
 				else{
 					if(dif[a]!=-1){
 						ua=dif[a];
 						while(ua!=same[ua]){ua=same[ua];}
 						same[ua]=b;
 					}
 					dif[a]=b;
 					if(dif[b]!=-1){
 						ub=dif[b];
 						while(ub!=same[ub]){ub=same[ub];}
 						same[ub]=a;
 					}
 					dif[b]=a;					
 				}
 			}
 			System.out.println("Scenario #"+t+":");
 			if(flag==true){
 				System.out.println("Suspicious bugs found!");
 			}
 			else{
 				System.out.println("No suspicious bugs found!");
 			}
 			System.out.println();
 		}
 
 	}
 
 }