/* Calculating square numbers using Babbage stuff */
#include <stdio.h>

int i,value,sum;

void main()
{
	printf("Give a number:"); 
	scanf("%d",&value);
	sum=0;
	for (i=1;i<=value;i++)
		sum+=(i*2);
	sum-=value;
	printf("%d is the square!\n",sum);
}