#define USE_TI89
#define RETURN_VALUE
#define OPTIMIZE_ROM_CALLS
#define MIN_AMS 200
#define ENABLE_ERROR_RETURN
#include <tigcclib.h>

void _main(void)
{
	if(ArgCount() > 2) ER_throw(940);
	
	ESI q = top_estack;
	char *a[19] = {"1s","2s","2p","3s","3p","4s","3d","4p","5s","4d","5p","6s","4f","5d","6p","7s","5f","6d","7p"},
		b[19] = {2,2,6,2,6,2,10,6,2,10,6,2,14,10,6,2,14,10,6},
		c = 0,
		d[81] = "",
		*h[6] = {"He","Ne","Ar","Kr","Xe","Rn"},
		i = 5,
		j[6] = {2,10,18,36,54,86},
		x = GetIntArg(q);
	
	switch(GetIntArg(q))
	{
		case 1:
			for(;i>=0;--i)
				if(x > j[i])
				{
					sprintf(d,"[%s] ",h[i]);
					x -= j[i];
					c = 2*(i+(i-3)*(i>3))+(i==3)+1;
					break;
				}
		case 0:
			for(;;++c)
			{
				strcat(d,a[c]);
				if(x<=b[c])
				{
					sprintf(d,"%s%d",d,x);
					push_zstr(d);
					return;
				}
				x -= b[c];
				sprintf(d,"%s%d ",d,b[c]);
			}
		default:
			ER_throw(260);
	}
}