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- #include <bits/stdc++.h>
- using namespace std;
- class Solution {
- public:
- string convert(string s, int numRows) {
- if(numRows == 1) return s;
- int loop = numRows * 2 - 2;
- vector<char> res[numRows];
- for(int i = 0 ; i < (int)s.length() ; i++){
- if(i % loop < numRows){
- res[i % loop].push_back(s[i]);
- }else{
- res[loop - (i % loop)].push_back(s[i]);
- }
- }
- string ans = "";
- for(int i = 0 ; i < numRows ; i++)
- for(char x : res[i])
- ans += x;
- return ans;
- }
- };
- int main(){
- Solution sol;
- auto s = sol.convert("PAYPALISHIRING", 3);
- printf("%s\n", s.c_str());
- }
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