import java.util.*;
import java.lang.*;
import java.io.*;
 
 
class Demo {
 
   public static void main(String[] args) {
int a =10;
int b =20;
int c =15;
 
System.out.println("c = a + b is "+ (c = a + b ));
 
System.out.println("c += a is "+ (c += a) );
 
System.out.println("c -= a is "+ (c -= a) );
 
System.out.println("c *= a is "+ (c *= a) );
 
System.out.println("c /= a is "+ (c /= a) );
 
System.out.println("c %= a is "+ (c %= a) );
 
    }
}

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