示例#1
0
文件: uva619.java 项目: de-yu/uva
 public static void abcd(String str) {
   BigInteger sum = BigInteger.ZERO;
   StringBuffer n = new StringBuffer("");
   for (int i = 0; i < str.length(); i++) {
     BigInteger ab = BigInteger.valueOf(((int) str.charAt(i)) - 96);
     sum = sum.add(div.pow(str.length() - i - 1).multiply(ab));
   }
   String s = sum.toString();
   for (int i = 0; i < s.length(); i++) {
     if (i % 3 == 0 && i != 0) n.insert(0, ",");
     n.insert(0, s.charAt(s.length() - i - 1));
   }
   while (str.length() < 22) str = str + " ";
   System.out.println(str + "" + n);
 }
示例#2
0
文件: uva10219.java 项目: de-yu/uva
  public static void main(String[] args) throws IOException {
    Scanner scanner = new Scanner(new BufferedInputStream(System.in));
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

    while (scanner.hasNextInt()) {
      int n = scanner.nextInt();
      int k = scanner.nextInt();

      BigInteger sum = BigInteger.ONE;

      for (int i = n; i > n - k; i--) {
        sum = sum.multiply(BigInteger.valueOf(i));
      }
      for (int i = 2; i <= k; i++) {
        sum = sum.divide(BigInteger.valueOf(i));
      }

      System.out.println(sum.toString().length());
    }
  }