#include <stdio.h>
void f(int i)
{
printf("in f(),%d\n",i);
}
void g(int i)
{
printf("in g(),%d\n",i);
}
void h(int i)
{
printf("in h(),%d\n",i);
}
void k(int i)
{
printf("in k(),%d\n",i);
}
int main(void)
{
int i=0;
void (*fa[])(int)= {f,g,h,k};
scanf("%d",&i);
if( i>=0&& i<= sizeof(fa)/sizeof(fa[0]) ){
(*fa[i])(0);
}
return 0;
}