string convert(string s, int numRows) {    if(numRows == 1){        return s;    }    int count = 0;    int num = 0;    string temp = "";    while(num != s.size()){        for (int i = 0; i < s.size() + numRows ;i += 2*(numRows-1)){            if(count != 0 && i - count >= 0 && i - count < s.size() && count != numRows-1){                temp += s[i-count];                num ++;            }            if(i + count < s.size()){                temp += s[i+count];                num ++;            }        }        count ++;    }    return temp;}