10519 solved

10519.java

@@ -0,0 +1,32 @@
+import java.io.*;
+import java.util.*;
+import java.math.*;
+
+class Main
+{
+  void solve()
+  {
+    Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
+    BigInteger two = new BigInteger("2");
+
+    while (in.hasNext())
+    {
+      BigInteger n = in.nextBigInteger();
+      BigInteger r = n.pow(2);
+
+      if (n.compareTo(new BigInteger("0")) == 0) {
+        System.out.println("1");
+      } else if (n.compareTo(new BigInteger("1")) == 0) {
+        System.out.println("2");
+      } else {
+        System.out.println(r.subtract(n).add(two).toString());
+      }
+    }
+  }
+
+  public static void main(String args[])
+  {
+    Main problem = new Main();
+    problem.solve();
+  }
+}