#include<stdio.h>

auto times_two(auto x){
	return x * 2;
}

int main(){
	int my_var =  times_two(5);
	
	double my_other_var = times_two(3.14);
	
	printf("%d\n", my_var);
	printf("%lf\n", my_other_var);
	return 0;

}