7

#include <stdio.h>
void swap_xy(int *x, int *y)
{
    int temp = *x;
    *x = *y;
    *y = temp;
}
int main()
{
   int x, y;
   scanf("%d %d", &x, &y);
   swap_xy(&x, &y);
   printf("x = %d y = %d\n", x, y);
    return 0;
}