Simplest but expensive


  • 0
    R
    class Solution {
        public String convert(String s, int numRows) {
            if(s.length() == 0 || s.length() == 1 || s.length() < numRows || numRows == 1)
                return s;
            String result = "";
            int n = (numRows - 1) * 2;
            
            for(int i = 0; i < numRows; i++) {
                for(int j = 0; j < s.length(); j++) {
                    if(j % n == i || j % n == n - i)
                        result += s.charAt(j);
                }
            }
            return result; 
        }
    }
    

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