#include<stdio.h>
#include<stdlib.h>

int *id,N;

int connected(int p,int q);
int root(int i);
void unn(int p,int q);

int main()
{
	FILE* file=fopen("a.txt","r");
	int i,p,q,c;
	fscanf(file,"%d",&N);

	id=(int *)malloc(N*sizeof(int));

	for(i=0;i<N;i++)
		*(id+i)=i;

	while(!feof(file))
	{
		if(2 == fscanf(file,"%d %d",&p,&q))
			if(!connected(p,q))
				unn(p,q);
	}
	fclose(file);
	c=1;

	while(c==1)
	{
		scanf("%d %d",&p,&q);
		printf("%d\nYes(1) or No(0)    ",connected(p,q));
		scanf("%d",&c);
	}

	return 0;
}

int connected(int p,int q)
{
	return((root(p))==(root(q)));
}

void unn(int p,int q)
{
	int j=root(q);
	int i=root(p);
	*(id+j)=i;
}

int root(int i)
{
	while(i!=(*(id+i)))
		i=*(id+i);
	return(i);
}