#include <stdio.h>
void sort(int*x,int*y);
void swap(int*x,int*y);
int main(void){
int x,y;
sort(&x,&y);
}
void sort(int*x,int*y){
if(*x<*y){
swap(&x,&y);
}
}
void swap(int*x,int*y){
int a;
a=*x;
*x=*y;
*y=a;
}
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