Hackerrank Coding Solution

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Exam Pattern:

Coding Question: 1

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Coding Question:

Phone number:

When we share our phone numbers with others, we share the numbers digit by digit.

Given a phone number in words, convert the number to digits.

For example, convert “Six four eight three to “6483”.

1. All phone numbers will be 10 digits.

2. Two repeating digits will be shortened using the word “double”. Three repeating digits will be shortened using the word “triple”. If the digits repeat four or more times, they will be shortened using “double” and “triple” multiple times.

3. The input will be always valid. For example, we won’t have a scenario like “double double two”. It will be “double two double two”

4. The entire input will be in lowercase.

Example 1

Input:

two one nine six eight one six four six zero

Output:

2196816460

Note:

Remove Everything in compiler, keep empty compiler and Type below python or java code.

Coding Solution:

Python 3:

def getPhoneNumber(s):
    d={'zero':0,'one':1,'two':2,'three':3,'four':4,'five':5,'six':6,'seven':7,'eight':8,'nine':9}
    res=''
    t=s.split()
    i=0
    while(i<len(t)):
        if t[i]!='double' and t[i]!='triple':
            res+=str(d[t[i]])
        else:
            if t[i]=='double':
                y=str(d[t[i+1]])*2
            else:
                y=str(d[t[i+1]])*3
            i+=1
            res+=y
        i+=1
    return res

n=input()
print(getPhoneNumber(n))

Java:

import java.util.HashMap;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String input = scanner.nextLine();
        System.out.println(getPhoneNumber(input));
    }

    public static String getPhoneNumber(String s) {
        HashMap<String, Integer> d = new HashMap<>();
        d.put("zero", 0);
        d.put("one", 1);
        d.put("two", 2);
        d.put("three", 3);
        d.put("four", 4);
        d.put("five", 5);
        d.put("six", 6);
        d.put("seven", 7);
        d.put("eight", 8);
        d.put("nine", 9);

        StringBuilder res = new StringBuilder();
        String[] t = s.split(" ");
        int i = 0;
        while (i < t.length) {
            if (!t[i].equals("double") && !t[i].equals("triple")) {
                res.append(d.get(t[i]));
            } else {
                String y;
                if (t[i].equals("double")) {
                    y = String.valueOf(d.get(t[i + 1])).repeat(2);
                } else {
                    y = String.valueOf(d.get(t[i + 1])).repeat(3);
                }
                i++;
                res.append(y);
            }
            i++;
        }
        return res.toString();
    }
}