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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ulli unsigned long long int
  4. #define lli long long int
  5. #define BIG(a,b) (a>b)?a:b
  6. #define SMALL(a,b) (a<b)?a:b
  7. #define FOR(i,o,n) for(auto i=o;i<n;i++)
  8. #define mod 1000000007
  9.  
  10. void pointer(string* str)
  11. {
  12.  
  13.     cout<<*str<<endl;
  14.     cout<<*(*str).begin()<<endl;
  15.     cout<<*((*str).begin()+1)<<endl;
  16.     cout<<str<<endl;
  17.     *((*str).begin()+1)='n';
  18. }
  19.  
  20. void test(lli n)
  21. {
  22. 	string s,s1,s2;
  23.         cin>>s;
  24.         lli row = s.size()/n;
  25.         vector<string> str;
  26.         //cout<<s;
  27.         for(auto j=0,i=0;i<s.size();i+=n,j++)
  28.         {
  29.         	s1=s.substr(i,n);
  30.         	if(i%2!=0)
  31.         		reverse(s1.begin(),s1.end());
  32.  
  33.             str.push_back(s1);
  34.             //cout<<str[j]<<" "<<str[j][2]<<"\n";
  35.         }
  36.         FOR(i,0,n)
  37.         {
  38.         	FOR(j,0,row)
  39.         	{
  40.         		s2+=str[j][i];
  41.         	}
  42.         }
  43.         cout<<s2<<"\n";
  44. }
  45.  
  46.  
  47. int main()
  48. {
  49.     ios_base::sync_with_stdio( false );
  50.     cin.tie(NULL);
  51.  
  52.     lli t,n,flag=0,w,k;
  53.  
  54.     //cin>>t;
  55.     //while(t--)
  56.     while(cin>>n && n!=0)
  57.     {
  58.  
  59.     	test(n);
  60.  
  61.     }
  62.  
  63.     return 0;
  64. }
  65.  
Success #stdin #stdout 0s 4424KB
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5
toioynnkpheleaigshareconhtomesnlewx
3
ttyohhieneesiaabss
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theresnoplacelikehomeonasnowynightx
thisistheeasyoneab
https://ideone.com/8T5byj
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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