A1031 Hello World for U (20 minutes | string processing, annotated in detail, logic analysis)

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EDITORIAL

• Ideas analysis
  • 
  • 10 minutes a problem, will not be repeated (water title)

Test Case

• input:
  helloworld!
  
  output:
  h   !
  e   d
  l   l
  lowor
  

ac Code

• Direct output

  #include<iostream>
  #include<string>
  using namespace std;
  int main()
  {
      string s;
      cin >> s;
      int len = s.length(), lrhigh = (len+2) / 3, bottom = len - 2 * lrhigh;
      for (int i = 0; i < lrhigh-1; i++)
      {
          printf("%c", s[i]);
          for (int k = bottom; k >0; k--)printf(" ");
          printf("%c", s[len - 1 - i]);
          printf("\n");
      }
      for (int i = lrhigh - 1; i <= lrhigh + bottom; i++)
          printf("%c", s[i]);
      return 0;
  }
  

• Reference Code