shunfurh
编程介的小学生
2017-12-10 13:52

R(N)

  • as
  • x
  • each

Problem Description
We know that some positive integer x can be expressed as x=A^2+B^2(A,B are integers). Take x=10 for example,
10=(-3)^2+1^2.
We define R(N) (N is positive) to be the total number of variable presentation of N. So R(1)=4, which consists of 1=1^2+0^2, 1=(-1)^2+0^2, 1=0^2+1^2, 1=0^2+(-1)^2.Given N, you are to calculate R(N).

Input
No more than 100 test cases. Each case contains only one integer N(N<=10^9).

Output
For each N, print R(N) in one line.

Sample Input
2
6
10
25
65

Sample Output
4
0
8
12
16

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