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Leetcode | ZigZag Conversion
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".
1 class Solution { 2 public: 3 string convert(string s, int nRows) { 4 if (s.empty() || nRows <= 1) return s; 5 stringstream ss; 6 int n = s.length(); 7 for (int row = 0; row < nRows; ++row) { 8 for (int i = row; i < n; ) { 9 if (nRows - row - 1 > 0) {10 ss << s[i];11 i += 2 * (nRows - row - 1);12 if (i >= n) break;13 14 }15 if (row > 0) {16 ss << s[i];17 i += 2 * row;18 if (i >= n) break;19 }20 }21 }22 return ss.str();23 }24 };
Leetcode | ZigZag Conversion
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