#include "stdio.h"
#include "stdlib.h"

int main (int argc, char *argv[])
{
	int i = atoi(argv[1]);
	int result = 0;
	
	result = increment(i);
	printf("%d\n", result);
	result = decrement(i);
	printf("%d\n", result);
	result = mult2(i);
	printf("%d\n", result);
	
	return(0);
}