Help me in solving LJAJAG38 problem

help
,
1

My issue

my coad is right but it’s tell wrong answer.

My code

#include <stdio.h>

 void swapByValue(int x, int y)
{
    int temp = x;
    x = y;
    y = temp;
    printf("Using call-by-value x=%d,y=%d\n", x, y);
    
}
 void swapByReference(int *x, int *y)
 {
     int temp = *x;
     *x = *y;
     *y = temp;
     printf("Using call-by-reference x=%d,y=%d\n", *x, *y);
 }
 
 int main()
 {
    
     
     int a, b;
     
     scanf("%d %d", &a, &b);
     printf("Using call-by-value x=%d,y=%d\n", a, b);
     
     swapByReference(&a, &b);
     
     return 0;
 }

Learning course: Learn C Programming
Problem Link: https://www.codechef.com/learn/course/rcpit-programming-c/RCPITLPC37/problems/LJAJAG38