LeetCode 6. ZigZag Conversion

水题

class Solution {
public:
    string convert(string s, int numRows) {
        
        if(numRows <= 1)
            return s;
        string str[numRows];
        int row = 0, add;
        for(int i=0; i<s.size(); ++ i)
        {
            str[row] += s[i];

            if(row == 0)
                add = 1;
            if(row == numRows - 1)
                add = -1;

            row += add;
        }
        s.clear();
        for(int i=0; i<numRows; ++ i)
            s.append(str[i]);
        return s;
    }
};