#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#define swap(t,x,y) { t _z;
_z = y;
y = x;
x = _z; }
int main()
{
int a = 0,b = 1;
swap(int,a,b);
printf("%d %d
",a,b);
return 0;
}