#include <stdio.h>

void swap(int *a,int *b,int *c){
    int temp;
    temp = *a;
    *a = *c;
    *c = temp;
    temp = *c;
    *c = *b;
    *b = temp;
}

int main() {
    int n = 0;
    int a = 10;
    int b = 20;
    int c = 30;

    swap(&a,&b,&c);
    
    printf("%d,%d,%d",a,b,c);
}