We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Algorithms
  3. Implementation
  4. Encryption
  5. Discussions

Encryption

Sort by

recency

|

1497 Discussions

|

  • yashdeora98294
     + 0 comments

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

  • giorgibregvadze1
     + 0 comments

    Javascript

    function encryption(s) {
    const rows = Math.floor(Math.sqrt(s.length));
    const columns = Math.ceil(Math.sqrt(s.length));
    const realNumberOfRows = s.length > rows * columns? rows + 1:rows;
    const wordsArray = [];
    const encryptedArray = [];
    for(let i = 0; i < realNumberOfRows; i++){wordsArray.push(s.split("").splice(i*columns,columns));
    }
    for(let i = 0; i < columns; i++){
        const newWord = [];
        wordsArray.forEach(item=>newWord.push(item[i]));
        encryptedArray.push(newWord.join(''));
    }  
    return encryptedArray.join(' ');
}

  • oluwashetemipe
     + 0 comments

    public static String encryption(String s) { // Write your code here int size = s.length();

    int x = (int)Math.floor(Math.sqrt(size));
int y = (int)Math.ceil(Math.sqrt(size));
if(x * y < size){
   x = y;
}
char[][] t = new char[x][y];
int index = 0;
for(int i = 0; i < x; i++ ){
    for(int j = 0; j < y; j++){
        if(index == size){
            break;
        }
        t[i][j] = s.charAt(index);
        index++;

    }
}
int io = 0;
StringBuilder enc = new StringBuilder();
for(int i = 0; i < y; i++){
    if( i != 0){
        enc.append(" ");
    }
    for(int j = 0; j < x; j++){
        if(t[j][i] == 0){
            continue;
        }
        enc.append(t[j][i]);
        io++;  
        if(io == size){
            break;
        }
    }
}

return enc.toString();
}

  • emhhacker
     + 0 comments

    My Java solution with o(n * m) time complexity and o(n) space complexity:

    public static String encryption(String s) {
        // remove the spaces from the string
        s.replaceAll(" ", "");
        
        // get the len of the string
        int length = s.length();
        
        // set x equal to floor of sqrt of len
        int x = (int) Math.floor(Math.sqrt(length));
        
        // set y equal to ceil of sqrt of len
        int y = (int) Math.ceil(Math.sqrt(length));
        if(x * y < length) x += 1;
        
        // print each char of the string x by y
        StringBuilder encryptedString = new StringBuilder();
        for(int i = 0; i < y; i++){
            for(int j = 0; j < x; j++){
                int idx = j * y + i;
                if(idx < length)
                    encryptedString.append(s.charAt(idx));
            }
            encryptedString.append(' '); //line break
        }
        return encryptedString.toString();
    }

  • robertbielicki
     + 0 comments
    def encryption(s: str) -> str:
    temp = s.replace(" ", "")
    cols = ceil(sqrt(len(temp)))
    batch = list(batched(temp, cols))
    result = [[word[c] for word in batch if len(word) > c] for c in range(cols)]
    return " ".join("".join(x) for x in result)