C++:
#include <iostream>
Using namespace std;
Int main(){
Cin>>n;
Cout<<endl;
Cout<<3*n<<endl;
Return 0;
}
Uses crt;
Var n:longint;
Begin
Readln(n);
Writeln(3*n);
Readln
End.
uses crt;
var n:integer;
begin
clrscr;
write('n='); readln(n);
write(3*n);
readln;
end.