import java.util.*;
public class Main {
public static void main
(String[] args
) { Scanner sc
= new Scanner
(System.
in); int n = sc.nextInt();
Set<String> st = new HashSet<>();
for(int i=0;i<n;i++){
st.add(t+"/"+c);
}
System.
out.
println(st.
size()); }
}
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