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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		var k:integer;
        begin
        readln(k);
        if(k<4){
        cout<<0;
        }else{
        k:=k-3;
        cout<<k;
        end.
	}
}

prog.cpp:3:1: error: ‘import’ does not name a type; did you mean ‘short’?
 import java.util.*;
 ^~~~~~
 short
prog.cpp:4:1: error: ‘import’ does not name a type; did you mean ‘short’?
 import java.lang.*;
 ^~~~~~
 short
prog.cpp:5:1: error: ‘import’ does not name a type; did you mean ‘short’?
 import java.io.*;
 ^~~~~~
 short
prog.cpp:10:8: error: expected ‘:’ before ‘static’
  public static void main (String[] args) throws java.lang.Exception
        ^~~~~~~
        :
prog.cpp:10:27: error: ‘String’ has not been declared
  public static void main (String[] args) throws java.lang.Exception
                           ^~~~~~
prog.cpp:10:36: error: expected ‘,’ or ‘...’ before ‘args’
  public static void main (String[] args) throws java.lang.Exception
                                    ^~~~
prog.cpp:10:40: error: expected ‘;’ at end of member declaration
  public static void main (String[] args) throws java.lang.Exception
                                        ^
                                         ;
prog.cpp:10:42: error: ‘throws’ does not name a type
  public static void main (String[] args) throws java.lang.Exception
                                          ^~~~~~
prog.cpp:22:1: error: expected ‘}’ at end of input
 }
 ^
prog.cpp:9:1: note: to match this ‘{’
 {
 ^
prog.cpp:22:1: error: expected unqualified-id at end of input
 }
 ^

Standard output is empty