fork(1) download
copy 
  1. def sinal(x): return -1 if x < 0 else 1 if x > 0 else 0
  2. def isp  (n): return sinal( n - 2 - sum( sinal(n%i)                             for i in range(2,n     ) ) )
  3. def nump (n): return        n - 1 - sum( isp(j)                                 for j in range(2,n+1   ) )
  4. def primo(n): return                sum( k*(1-isp(k))*(1-abs(sinal(n-nump(k)))) for k in range(2,n**2+8) )
  5.  
  6. print(isp(4))
  7. print(nump(10))
  8. print(primo(10))
Success #stdin #stdout 0.14s 14208KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1
4
29
https://ideone.com/CI2lcK
language:
Python 3 (python  3.12)
created:
14 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!