Score matrix code language: c

ArticleDirectory

• Score Matrix

Score Matrix time limit: 1000 ms memory limit: 10000 k total time limit: 3000 Ms

Description:

We define the following matrix:
1/1 1/2 1/3
1/2 1/1 1/2
1/3 1/2 1/1
The elements on the diagonal line of the matrix are always 1/1, and the denominator of the scores on both sides of the diagonal line increases one by one.
The sum of the requested matrices.

Input:

Given an integer n (n <50000) in each row, the matrix is N * n.

Output:

Output answer, retain 2 decimal places.

Input example:

1
2
3

Output example:

1.00
3.00
5.67

Tip:

 

Source:

Code:

View code

 1 # Include <stdio. h>
2 # Include <stdlib. h>
 3   Int Main ()
 4 { Int N;
 5 Scanf ( "  % D  " , & N );
 6    Float I;
 7    Float Sum = N;
 8    For (I = 2 ; I <= N; I ++)
 9 {
 10 Sum = sum + 1 /I * 2 * (N-I + 1 );
 11 }
 12 Printf ( "  %. 2f \ n  " , Sum );
 13   Return   0 ;
 14 }