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".
题意是按之字形将元字符串组织成n行，然后将这n行字符串拼接起来输出
class Solution {
public:
string convert(string s, int nRows) {
int sLen=s.length();
if(sLen==0)return ""; //考虑字符串为空的情况
if(nRows==1)return s; //考虑nRows=1的情况
int bottomBound=0;
int topBound=nRows-1;
int pCount=0;
bool direction=false;
vector<string> rowStrs(nRows, "");
for(int i=0; i<sLen; i++){
rowStrs[pCount]+=s[i];
if(pCount==bottomBound){
direction=true;
}
else if(pCount==topBound){
direction=false;
}
if(direction)pCount++;
else pCount--;
}
string resultStr=""; //拼接字符串
for(int i=0; i<nRows; i++)
resultStr+=rowStrs[i];
return resultStr;
}
};LeetCode 006 ZigZag Conversion,布布扣,bubuko.com
LeetCode 006 ZigZag Conversion
原文：http://blog.csdn.net/harryhuang1990/article/details/25771949