ZigZag Conversion

这题就很简单了，4分钟搞定

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   NA P L S I I GY   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".

---

我的实现代码

public static String convert(String s, int numRows) {          int point = numRows - 1, j = 0;String s0 = "";int i = point;if(i == 0) return s;int margin0 = i << 1;int margin = 0;while(i > 0) {margin = i << 1;j = point - i;while(j < s.length()) {s0 += s.charAt(j); j += margin; if(i != point) {margin = margin0 - margin; }}i--;}j = point - i;margin = j << 1;while(j < s.length()) {s0 += s.charAt(j); j += margin;}        return s0;  }