1031. Hello World for U (20)

1031. Hello World for U (20)
 
  
   
    时间限制
   
   
    400 ms
    


  
  
   
    内存限制
   
   
    65536 kB
    


  
  
   
    代码长度限制
   
   
    16000 B
    


  
  
   
    判题程序
   
   
    Standard
   
  
  
   作者
  
  
   CHEN, Yue
   


 
 
  Given any string of N (>=5) characters, you are asked to form the characters into the shape of U. For example, "helloworld" can be printed as:
  h  d
e  l
l  r
lowo
  That is, the characters must be printed in the original order, starting top-down from the left vertical line with n
  1characters, then left to right along the bottom line with n
  2 characters, and finally bottom-up along the vertical line with n
  3 characters. And more, we would like U to be as squared as possible -- that is, it must be satisfied that n
  1 = n
  3 = max { k| k <= n
  2 for all 3 <= n
  2 <= N } with n
  1 + n
  2 + n
  3 - 2 = N.
  
  Input Specification:
  Each input file contains one test case. Each case contains one string with no less than 5 and no more than 80 characters in a line. The string contains no white space.
  Output Specification:
  For each test case, print the input string in the shape of U as specified in the description.
  Sample Input:
  helloworld!
  Sample Output:
  h   !
e   d
l   l
lowor
  对于一个字符串，把它尽量的弄成正方形的u；题目中的n1和n3为左右数量包括最后一行的头尾，n2为最后一行的数量。所以n1+n2+n3=N-2；
  
代码中的left_1=n1-1=(len-1)/3这里减一是为了不数最后一行的头;wordspacing=n2-2一行空格数；
#include<string> 字符串处理 用到substr（起始位置的标号，要输出的个数）；
比如 HelloWorld="12345";HelloWorld.substr(1, 3)那么输出从HelloWorld[1]开始向后输出3个为234；

  N>=5
  1.
  12345
  得
  

1 5
234
2.
123456
得
1  6
2345
3.
1234567
得
1 7
2 6
345

评测结果

测试点

#include<iostream>   
#include<string>
using namespace std;  
void worldspace(int size)
{
  for (int index = 0; index < size; index++)
    cout << " ";
}
int main()
{   
  string HelloWorld;
  int left_1, len,index,wordspacing;
  cin >> HelloWorld;
  len = HelloWorld.size();
  left_1 = (len -1)/ 3;
  wordspacing = len - 2 * left_1 - 2;
  for (index = 0; index < left_1; index++)
  {
    cout << HelloWorld[index];
    worldspace(wordspacing);
    cout << HelloWorld[len - 1 - index] << endl;;
  }
  cout << HelloWorld.substr(left_1, wordspacing+2) << endl;
  system("pause");
  return 0;
}