NEERC/zero/zero_re.java

   1 /*
   2     Solution for NEERC'2005 Problem Z: Zero-complexity Transposition
   3     (C) Roman Elizarov
   4     Note: this solution attempts to check correctness of the input
   5 */
   6
   7 import java.io.BufferedReader;
   8 import java.io.FileReader;
   9 import java.io.FileWriter;
  10 import java.io.PrintWriter;
  11 import java.util.StringTokenizer;
  12
  13 public class zero_re {
  14         static final int MAXN = 10000;
  15         static final long MAXABS = 1000000000000000L;
  16
  17         public static void main(String[] args) throws Exception {
  18                 // Read input
  19                 BufferedReader in = new BufferedReader(new FileReader("zero.in"));
  20                 int n = Integer.parseInt(in.readLine());
  21                 if (n < 1 || n > MAXN)
  22                         throw new IllegalArgumentException("n is out of range");
  23                 long[] a = new long[n];
  24                 StringTokenizer st = new StringTokenizer(in.readLine());
  25                 for (int i = 0; i < n; i++) {
  26                         a[i] = Long.parseLong(st.nextToken());
  27                         if (Math.abs(a[i]) > MAXABS)
  28                                 throw new IllegalArgumentException("a[i] is out of range");
  29                 }
  30                 if (st.hasMoreTokens())
  31                         throw new IllegalArgumentException("Extra data on line");
  32                 if (in.readLine() != null)
  33                         throw new IllegalArgumentException("Extra data in file");
  34                 in.close();
  35
  36                 // Write output
  37                 PrintWriter out = new PrintWriter(new FileWriter("zero.out"));
  38                 String sep = "";
  39                 for (int i = n; --i >= 0;) {
  40                         out.print(sep);
  41                         sep = " ";
  42                         out.print(a[i]);
  43                 }
  44                 out.close();
  45         }
  46 }