#include <stdio.h>
int main() {
int A[1000][1000],B[1000][1000],c[1000];
int a,b,c;
void DFS(int a,int b)
{
B[0][0]=1;
c[0]=1;
}
scanf("%d",&a);
for(int i=0;i<a;i++)
{
scanf("%d",a);
scanf("%d %d"x[0][i],y[0][i]);
}
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