Hackerrank – Problem description
The problem description – Hackerrank.
Solution
For detailed informations look at the implementation.
I created basic number to word translations. The I find out how many times is a given number present in basic translations.
E.g. 12 324 is 12 x 1000, than “twelve thousand”. The rest is without 12 000, it is 324. 324 constists of 3 x 100, then “three hundred” and 24 “twenty four”. Together “twelve thousand three hundred twenty four”
I created solution in:
All solutions are also available on my GitHub profile.
Java
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import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Scanner; public class NumberToWords { private static final String ZERO = "Zero"; private static final String ONE = "One"; private static final String TWO = "Two"; private static final String THREE = "Three"; private static final String FOUR = "Four"; private static final String FIVE = "Five"; private static final String SIX = "Six"; private static final String SEVEN = "Seven"; private static final String EIGHT = "Eight"; private static final String NINE = "Nine"; private static final String TEN = "Ten"; private static final String ELEVEN = "Eleven"; private static final String TWELVE = "Twelve"; private static final String THIRTEEN = "Thirteen"; private static final String FOURTEEN = "Fourteen"; private static final String FIFTEEN = "Fifteen"; private static final String SIXTEEN = "Sixteen"; private static final String SEVENTEEN = "Seventeen"; private static final String EIGHTEEN = "Eighteen"; private static final String NINETEEN = "Nineteen"; private static final String TWENTY = "Twenty"; private static final String THIRTY = "Thirty"; private static final String FORTY = "Forty"; private static final String FIFTY = "Fifty"; private static final String SIXTY = "Sixty"; private static final String SEVENTY = "Seventy"; private static final String EIGHTY = "Eighty"; private static final String NINETY = "Ninety"; private static final String HUNDRED = "Hundred"; private static final String THOUSAND = "Thousand"; private static final String MILLION = "Million"; private static final String BILLION = "Billion"; private static final String TRILLION = "Trillion"; private static final Map<Long, String> NUMBER_WORDS = new HashMap<>(); static { NUMBER_WORDS.put(0L, ZERO); NUMBER_WORDS.put(1L, ONE); NUMBER_WORDS.put(2L, TWO); NUMBER_WORDS.put(3L, THREE); NUMBER_WORDS.put(4L, FOUR); NUMBER_WORDS.put(5L, FIVE); NUMBER_WORDS.put(6L, SIX); NUMBER_WORDS.put(7L, SEVEN); NUMBER_WORDS.put(8L, EIGHT); NUMBER_WORDS.put(9L, NINE); NUMBER_WORDS.put(10L, TEN); NUMBER_WORDS.put(11L, ELEVEN); NUMBER_WORDS.put(12L, TWELVE); NUMBER_WORDS.put(13L, THIRTEEN); NUMBER_WORDS.put(14L, FOURTEEN); NUMBER_WORDS.put(15L, FIFTEEN); NUMBER_WORDS.put(16L, SIXTEEN); NUMBER_WORDS.put(17L, SEVENTEEN); NUMBER_WORDS.put(18L, EIGHTEEN); NUMBER_WORDS.put(19L, NINETEEN); NUMBER_WORDS.put(20L, TWENTY); NUMBER_WORDS.put(30L, THIRTY); NUMBER_WORDS.put(40L, FORTY); NUMBER_WORDS.put(50L, FIFTY); NUMBER_WORDS.put(60L, SIXTY); NUMBER_WORDS.put(70L, SEVENTY); NUMBER_WORDS.put(80L, EIGHTY); NUMBER_WORDS.put(90L, NINETY); NUMBER_WORDS.put(100L, HUNDRED); NUMBER_WORDS.put(1_000L, THOUSAND); NUMBER_WORDS.put(1_000_000L, MILLION); NUMBER_WORDS.put(1_000_000_000L, BILLION); NUMBER_WORDS.put(1_000_000_000_000L, TRILLION); } public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int tests = Integer.parseInt(scanner.nextLine()); for (int i = 0; i < tests; i++) { long l = Long.parseLong(scanner.nextLine()); List<Integer> numbers = new ArrayList<>(); int divisor = 10; while (l > 0) { int remainder = (int) (l % divisor); numbers.add(remainder); l /= divisor; } StringBuilder result = new StringBuilder(); if (numbers.size() == 0) { result.append(ZERO); } for (int index = 0; index < numbers.size();) { long power = (long) Math.pow(10, index); if (power >= 1_000_000_000_000L) { long number = numbers.get(index++); if (number > 0) { StringBuilder temp = new StringBuilder(); String wordNumber = NUMBER_WORDS.get(number); temp.append(wordNumber); temp.append(" "); String wordPower = NUMBER_WORDS.get(power); temp.append(wordPower); temp.append(" "); result.insert(0, temp); } } else if (power >= 1_000_000_000) { long number1 = 0; long number2 = 0; long number3 = 0; if (index < numbers.size()) { number3 = numbers.get(index++); } if (index < numbers.size()) { number2 = numbers.get(index++); } if (index < numbers.size()) { number1 = numbers.get(index++); } if (number1 > 0 || number2 > 0 || number3 > 0) { StringBuilder temp = new StringBuilder(); if (number1 > 0) { String wordNumber = NUMBER_WORDS.get(number1); temp.append(wordNumber); temp.append(" "); temp.append(HUNDRED); temp.append(" "); } if (number2 > 1) { number2 *= 10; String wordNumber = NUMBER_WORDS.get(number2); temp.append(wordNumber); temp.append(" "); if (number3 > 0) { wordNumber = NUMBER_WORDS.get(number3); temp.append(wordNumber); temp.append(" "); } } else { String concat = String.valueOf(number2) + String.valueOf(number3); long n = Long.parseLong(concat); String wordNumber = NUMBER_WORDS.get(n); temp.append(wordNumber); temp.append(" "); } String billion = NUMBER_WORDS.get(1_000_000_000L); temp.append(billion); temp.append(" "); result.insert(0, temp); } } else if (power >= 1_000_000) { long number1 = 0; long number2 = 0; long number3 = 0; if (index < numbers.size()) { number3 = numbers.get(index++); } if (index < numbers.size()) { number2 = numbers.get(index++); } if (index < numbers.size()) { number1 = numbers.get(index++); } if (number1 > 0 || number2 > 0 || number3 > 0) { StringBuilder temp = new StringBuilder(); if (number1 > 0) { String wordNumber = NUMBER_WORDS.get(number1); temp.append(wordNumber); temp.append(" "); temp.append(HUNDRED); temp.append(" "); } if (number2 > 1) { number2 *= 10; String wordNumber = NUMBER_WORDS.get(number2); temp.append(wordNumber); temp.append(" "); if (number3 > 0) { wordNumber = NUMBER_WORDS.get(number3); temp.append(wordNumber); temp.append(" "); } } else { String concat = String.valueOf(number2) + String.valueOf(number3); long n = Long.parseLong(concat); String wordNumber = NUMBER_WORDS.get(n); temp.append(wordNumber); temp.append(" "); } String million = NUMBER_WORDS.get(1_000_000L); temp.append(million); temp.append(" "); result.insert(0, temp); } } else if (power >= 1_000) { long number1 = 0; long number2 = 0; long number3 = 0; if (index < numbers.size()) { number3 = numbers.get(index++); } if (index < numbers.size()) { number2 = numbers.get(index++); } if (index < numbers.size()) { number1 = numbers.get(index++); } if (number1 > 0 || number2 > 0 || number3 > 0) { StringBuilder temp = new StringBuilder(); if (number1 > 0) { String wordNumber = NUMBER_WORDS.get(number1); temp.append(wordNumber); temp.append(" "); temp.append(HUNDRED); temp.append(" "); } if (number2 > 1) { number2 *= 10; String wordNumber = NUMBER_WORDS.get(number2); temp.append(wordNumber); temp.append(" "); if (number3 > 0) { wordNumber = NUMBER_WORDS.get(number3); temp.append(wordNumber); temp.append(" "); } } else { String concat = String.valueOf(number2) + String.valueOf(number3); long n = Long.parseLong(concat); String wordNumber = NUMBER_WORDS.get(n); temp.append(wordNumber); temp.append(" "); } String thousand = NUMBER_WORDS.get(1_000L); temp.append(thousand); temp.append(" "); result.insert(0, temp); } } else { long number1 = 0; long number2 = 0; long number3 = 0; if (index < numbers.size()) { number3 = numbers.get(index++); } if (index < numbers.size()) { number2 = numbers.get(index++); } if (index < numbers.size()) { number1 = numbers.get(index++); } if (number1 > 0 || number2 > 0 || number3 > 0) { StringBuilder temp = new StringBuilder(); if (number1 > 0) { String wordNumber = NUMBER_WORDS.get(number1); temp.append(wordNumber); temp.append(" "); temp.append(HUNDRED); temp.append(" "); } if (number2 > 1) { number2 *= 10; String wordNumber = NUMBER_WORDS.get(number2); temp.append(wordNumber); temp.append(" "); if (number3 > 0) { wordNumber = NUMBER_WORDS.get(number3); temp.append(wordNumber); temp.append(" "); } } else { String concat = String.valueOf(number2) + String.valueOf(number3); long n = Long.parseLong(concat); if (n > 0) { String wordNumber = NUMBER_WORDS.get(n); temp.append(wordNumber); temp.append(" "); } } result.insert(0, temp); } } } System.out.println(result.toString().trim()); } scanner.close(); } } |