#include <stdio.h>
void swap(int a,int b);
int main() {
    int a,b;
    scanf("%d %d",&a,&b);
    swap(a,b);
    printf("swapping:a=%d,b=%d\n",a,b);
return 0;
}
void swap(int a,int b){
    int temp=a;
    a=b;
    b=temp;
    print("after swap:a=%d,b=%d\n",a,b);
}