Help me in solving PPSC24A problem

help
,
1

My issue

What is the correct output

My code

#include <stdio.h>

int main() {
	// your code goes here
	int a = 21;
	int b = 40;
	
	printf ("%d\n", a + b);
	printf ("%d\n", a - b);
	printf ("%d\n", a * b);
	printf ("%d\n", a / b);
	printf ("%d\n", a % b);
	
	a++;
	printf ("%d\n", a);
	
	b--;
	printf ("%d\n", b);
	
	return 0;
}

Learning course: Programming and Problem solving using C
Problem Link: https://www.codechef.com/learn/course/ciet-programming-c/CIETPC08/problems/PPSC24A