The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)
P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSIIGYIR"Write the code that will take a string and make this conversion given a number of rows:
string convert(string text, int nRows); convert("PAYPALISHIRING", 3) should return "PAHNAPLSIIGYIR" . class Solution { public String convert(String s, int numRows) { char c[] = s.toCharArray(); int len = c.length; StringBuffer sb[] = new StringBuffer[numRows]; for(int i = 0; i < sb.length; i++) sb[i] = new StringBuffer(); int i = 0; while(i < len) { for(int j = 0; j < numRows && i < len; i++, j++) { sb[j].append(c[i]); } for(int j = numRows - 2; j > 0 && i < len; i++, j--) { sb[j].append(c[i]); } } for(int j = 1; j < sb.length; j++) { sb[0].append(sb[j]); } return sb[0].toString(); } }