padovan string, C/C++ Programming

padovan string

program 1 :
package test.padovanstring;

public class PadovanString {
    public int stringOccurrences(int n, String str){
  
    if(n >= 40)
    return -1;
    if(str.replaceAll("X|Y|Z","").length()>0)
    return -1;
    String res=pad(n);
    return(res.length() - res.replaceAll(str,"").length())/(str.length());
    }
public String pad(int n){
    if(n == 0) return "X";
    if(n == 1) return "Y";
    if(n == 2) return "Z";
    else return pad(n-2) + pad(n-3);
  
}
    public static void main(String []args)
    {
        PadovanString p = new PadovanString();
        System.out.println(p.stringOccurrences(21,"YZ"));
    }
}
 
 
 
Program set 2 :
import java.util.Scanner;
import java.util.ArrayList;
 
public class PadovanSeries
{
    public static void main(String[] arg)
    {
        Scanner read = new Scanner(System.in);
        System.out.println("Enter starting no. : ");
        int start = read.nextInt();
        System.out.println("Enter ending no. : ");
        int end = read.nextInt();
        int[] ans = getSeries(start, end);
        System.out.println("Padovan series : ");
        for (int a : ans)
            System.out.print(a + " ");
    }
 
    public static int[] getSeries(int s, int e)
    {
        ArrayList list = new ArrayList();
        int i, j = 0;
        for (i = s; i <= e; i++, j++)
            list.add(getPadovan(i));
        int[] ans = new int[j];
        for (i = 0; i < j; i++)
            ans[i] = list.get(i);
        return ans;
    }
 
    public static int getPadovan(int p)
    {
        if (p == 0 || p == 1 || p == 2)
            return 1;
        return (getPadovan(p - 2) + getPadovan(p - 3));
    }
}
 
Padovan String
Problem Description
A Padovan string P(n) for a natural number n is defined as:

P(0) = 'X'

P(1) = 'Y'

P(2) = 'Z'

P(n) = P(n-2) + P(n-3), n>2
where + denotes string concatenation.
For a string of the characters 'X' , 'Y' and 'Z' only, and given value of n, write a program that counts the number of occurrences of the string in the n-th Padovan string P(n).

An example is given below.

For n = 6 and the string ZY, the program should count the occurrences of ZY in P(6).

P(0) = 'X'

P(1) = 'Y'

P(2) = 'Z'

P(n) = P(n-2) + P(n-3), n>2


P(3) = P(1)+P(0)

P(3) = YX


P(4) = P(2)+P(1)

P(4) = ZY


P(5) = P(3)+P(2)

P(5) = YXZ


P(6) = P(4)+P(3)

P(6) = ZYYX

So, the number of occurrences of the string ZY in P(6) is 1.
Instruction to work with Open PBT Client:

    Specify the work directory path in the 'Work Directory Path' field. The path should correspond to your solution project directory.
    Download the support files by clicking the Get Dev Files.
    You will find the following three folders:
        bin
        src
        lib
    in your work directory.
    Code the solution in  . java file inside the src folder
    All required files will be downloaded to your work directory. Creating additional files is strongly discouraged.

Step 1:
In your solution file:

    Implement your logic in public int stringOccurrences(int n, String str) in class PadovanString.
    int    n: n is an integer represents n(th) for which full main string has to formed, from which occurrence of string str has to be found.
    String    str : str is a string represents sub string whose occurrence has to be found in the main string.

    You can create more methods but, do it in the same class.

Step 2:
In your solution keep in mind the following constraints:.

    In this problem you have to write a program that counts the number of occurrences of the string in the n-th Padovan string P(n).
    Padovan formula is P(n) = P(n-2) + P(n-3) where n>2 and n is the integer.
    In the above Padovan formula + sign means string concatenation.
    For the Padovan formula value of P(0),P(1) and P(2) is given. You have to use those value only.
    n should not be greater than 40 otherwise return -1
    string str should be consist of only X,Y and Z in upper case otherwise return -1

The Prototype of the method is:
public int stringOccurrences(int n, String str).
This method takes following arguments.

    n is the value for which full main string has to formed, from which occurrence of string str has to be found.
    str represents sub string whose occurrence has to be find in the main string.

    This method returns a number of occurrence of string str in the main string.

The constraints are:

    n should not be greater than 40 otherwise return -1
    string str should be consist of only X,Y and Z in upper case otherwise return -1

Example 1
Input :
int n = 6
string str = ZY
Output :
1
Explanation : This question is explained in problem description.
Example 2
Input :
int n = 6
String str = ZYmm
Output :
-1
Explanation :
String str is containing character other than X, Z and Y.
Example 3
Input :
int n = 8
String str = XZ
Output :

Posted Date: 9/3/2012 12:31:43 AM | Location : United States







Related Discussions:- padovan string, Assignment Help, Ask Question on padovan string, Get Answer, Expert's Help, padovan string Discussions

Write discussion on padovan string
Your posts are moderated
Related Questions
Explain structured programming The principal idea behind structured programming was as easy as the idea of "divide and conquer." A computer program could be regarded as having

A student apears in exam of math, physics, and chemistry. Write a program to find the total marks aa student has aqueired find the average.

Aim: Write a program of multipication using inline function class Multiply {           int x,y;           public:           void getdata();           inline calc

Project Description: I want a script for an online poker site. It needs to be scanning all the required tables and when the table meets certain criteria it should take a seat at

how is it made

Write a program to create a binary file and store the following data "hello", 0x0030,'1', 1.234  Using visual studio examine the binary file and note how the day is stored   Answe

c | c-c-c-c-c | c-c-C-c-c | c find distance between difftent carbon atom by programing

Node *orderedInsert(Node *p, int newval); /* Allocates a new Node with data value newval and inserts into the ordered list with first node pointer p in such a way that the data va

Explain Operator Overloading It is one type of Polymorphism, an significant feature of object-oriented programming .Polymorphism means one thing having many forms, i.e. here an