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"
解题思路：
观察题目，靠眼力寻找规律即可。如果没有读懂ＺｉｇＺａｇ的话，请移步
http://blog.csdn.net/zhouworld16/article/details/14121477
java实现
static public String convert(String s, int nRows) { if (s == null || s.length() <= nRows || nRows <= 1) return s; StringBuffer sb = new StringBuffer(); for (int i = 0; i < s.length(); i += (nRows - 1) * 2) sb.append(s.charAt(i)); for (int i = 1; i < nRows - 1; i++) { for (int j = i; j < s.length(); j += (nRows - 1) * 2) { sb.append(s.charAt(j)); if (j + (nRows - i - 1) * 2 < s.length()) { sb.append(s.charAt(j + (nRows - i - 1) * 2)); } } } for (int i = nRows - 1; i < s.length(); i += (nRows - 1) * 2) sb.append(s.charAt(i)); return new String(sb); }
Java for LeetCode 006 ZigZag Conversion
原文：http://www.cnblogs.com/tonyluis/p/4456244.html