UVA 10213(p336)----How Many Pieces of Land

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import java.io.*;import java.util.*;import java.math.*;public class Main{    static PrintWriter out = new PrintWriter(new  BufferedWriter(new OutputStreamWriter(System.out)));    public static void main(String args[]) throws IOException    {        Scanner cin=new Scanner(System.in);        int kase = cin.nextInt();        for(int c = 1; c <= kase; ++c)        {            BigInteger ans = BigInteger.valueOf(1);            String s = cin.next();            BigInteger n = new BigInteger(s);            BigInteger temp = new BigInteger(s);            temp = temp.multiply(temp.subtract(new BigInteger("1")));            temp = temp.divide(new BigInteger("2"));            ans = ans.add(temp);            temp = temp.multiply(n.subtract(new BigInteger("2")));            temp = temp.multiply(n.subtract(new BigInteger("3")));            temp = temp.divide(new BigInteger("12"));            ans = ans.add(temp);            System.out.println(ans);        }    }}

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