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  1. Prepare
  2. Algorithms
  3. Implementation
  4. The Time in Words
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The Time in Words

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  • gabrielh_hajduk2
     + 1 comment

    My java solution. Not all tests pass and i don't understand why. If i test them by hand they pass, but sending solution makes them not pass (for example test 2)

    class Result {

    /*
 * Complete the 'timeInWords' function below.
 *
 * The function is expected to return a STRING.
 * The function accepts following parameters:
 *  1. INTEGER h
 *  2. INTEGER m
 */

 private static final String[] NUMBERS = {
    "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten",
    "eleven", "twelve", "thirteen", "fourteen", "quarter", "sixteen", "seventeen",
    "eighteen", "nineteen", "twenty", "twenty one", "twenty two", "twenty three",
    "twenty four", "twenty five", "twenty six", "twenty seven", "twenty eight",
    "twenty nine", "half"
};

public static String timeInWords(int h, int m) {
// Write your code here
StringBuilder b = new StringBuilder();
if(m > 0 && m <= 30) {
    System.out.print(NUMBERS[m] + " past " + NUMBERS[h]);
    b.append(NUMBERS[m] + " past " + NUMBERS[h]);
} else if(m > 30) {
    System.out.print(NUMBERS[60-m] + " minutes to " + NUMBERS[h+1]);
    b.append(NUMBERS[60-m] + " minutes to " + NUMBERS[h+1]);
} else {
    System.out.print(NUMBERS[h] + " o' clock");
    b.append(NUMBERS[h] + " o' clock");
}
return b.toString();
}

    }

    Not all

  • kami518
     + 0 comments

    it seems to be an easy problem, however, work it out took me a lot of time.

    There are too many details and corner case to handle.

  • yashdeora98294
     + 0 comments

    Here is problem solution in Python, Java, C++, C and Javascript - https://programmingoneonone.com/hackerrank-the-time-in-words-problem-solution.html

  • shiaramoon
     + 1 comment

    Here is a section of code you can use just for converting the numbers 1-29 into words in python. Normally you could use :

    pip install num2words
from num2words import num2words as n2w

    but the environment on hackerrank doesn't allow the "pip install num2words" command. So I put together this to use instead for this challenge.

    def n2w(n):
    words = {
        1: "one",   2: "two",     3: "three",  4: "four",    5: "five",
        6: "six",   7: "seven",   8: "eight",  9: "nine",   10: "ten",
        11: "eleven", 12: "twelve", 13: "thirteen", 14: "fourteen", 15: "fifteen",
        16: "sixteen",17: "seventeen",18: "eighteen",19: "nineteen"
    }
    if n <= 19:
        return words[n]
    base = "twenty"
    return base if n == 20 else base + " " + words[n - 20]

  • emhhacker
     + 0 comments

    My Java solution with constant space and time complexity:

    private static final String[] NUM_WORDS = {
        "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten",
        "eleven", "twelve", "thirteen", "fourteen", "quarter", "sixteen", "seventeen",
        "eighteen", "nineteen", "twenty", "twenty one", "twenty two", "twenty three",
        "twenty four", "twenty five", "twenty six", "twenty seven", "twenty eight",
        "twenty nine", "half"
    };

    public static String timeInWords(int h, int m) {
        if(m == 0){
            //use o' clock
            String hour = NUM_WORDS[h];
            return hour + " o' clock";
        }
        if(m <= 30){
            //use past
            String minutes;
            if(m == 1)
                minutes = "one minute";
             else if(m == 15)
                minutes = "quarter";
            else if(m == 30)
                minutes = "half";
             else
                minutes = NUM_WORDS[m] + " minutes";
            
            String hour = NUM_WORDS[h];
            return minutes + " past " + hour;
        }
        else{
            //use to
            String minutes;
            if(60 - m == 1)
                minutes = "one minute";
             else if(60 - m == 15)
                minutes = "quarter";
             else
                minutes = NUM_WORDS[60 - m] + " minutes";
                
            String hour = NUM_WORDS[(h < 12) ? h + 1 : 1];
            return minutes + " to " + hour;
        }
    }