#include <stdio.h>  

#defi

#include   
 #define SWAP(a, b, c) c t; t=a, a=b, b=t;  
 int main() {      
   int x=10, y=20;      
   SWAP(x, y, int);      
   printf("%d %d ", x, y);      
   return 0;
 }

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