#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);
}