Help me in solving LJAJAG21 problem

help
,
1

My issue

What is wrong in my code

My code

#include <stdio.h>

int main() {
    // your code goes here
    int a = 83, b = 45, c;


    // swapping with using third variable

    c = a;
    a = b;
    b = c;

    printf("%d %d\n", a, b);




    //swapping without using third variable 

    a = a + b;
    b = a - b;
    a = a - b;

    printf("%d %d ", b, a);


}

Learning course: Learn C Programming
Problem Link: https://www.codechef.com/learn/course/rcpit-programming-c/RCPITLPC07/problems/LJAJAG21