sicily 1007. To and Fro 2016 11 02

// Problem#: 1007
// Submission#: 4893204
// The source code is licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
// URI: http://creativecommons.org/licenses/by-nc-sa/3.0/
// All Copyright reserved by Informatic Lab of Sun Yat-sen University
/*今天在实验室快要完成的时候刚好遇到关机，就在找到bug的时候，回来把bug一改就刚好做了，题目要求就是把一串字符串按照一定的顺序存入，诸如/* 1  2 3 4 5
                                      /*10 9 8 7 6
                                      /*11 12 13 14 15
                                      /*20 19 18 17 16
 
然后输出就是 1 10 11 20 2 .。。。。。。。5 6 15 16 //这里的数字只是一个位置·
 
 
*/
#include<iostream>
#include<string>
#include<cstdio>
#include<iostream>
using namespace std;
int main(){
    int column;
    while(cin>>column&&column){
        string s;
        getchar();
        getline(cin,s,'\n');
        int len = s.length();
        while(len%column!=0){
            s = s + "x";
            len = s.length();
        }
        len = s.length();
        int row = len/column;
        char max[row][column];
        int base = 0;
        for(int i=0;i<row;i++){
            if(i%2==0){
               for(int j=0;j<column;j++){
                max[i][j] = s[base];
                base ++;
               }
            }
            else{
               for(int j=column-1;j>=0;j--){
                max[i][j] = s[base];
                base ++;
               }
            }
        }
        for(int i=0;i<column;i++){
            for(int j=0;j<row;j++){
              cout<<max[j][i];  
            }
        }   
       cout<<endl;
        
    }
    return 0;
}