Fn.java
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Fn {
int points;
int lines;
int a;
int b;
int[] p;
boolean found;
while((line = br.readLine()) != null){
found = false;
lis = line.split(" ");
p = new int[points+1];
for (int i = 0; i < lines; i++) {
line = br.readLine();
lis = line.split(" ");
// System.out.println(a+" "+b);
p[a] += 1;
p[b] += 1;
}
for (int i = 0; i < p.length; i++) {
if (p[i] >= 4){
found = true;
break;
}
}
if (!found){
}
}
br.close();
}
}