Function encode_radix 

pub fn encode_radix(val: u64, basis: u64, nb_block: u64) -> Vec<u64>

use concrete_integer::wopbs::{decode_radix, encode_radix};

let val = 11;
let basis = 2;
let nb_block = 5;
let radix = encode_radix(val, basis, nb_block);

assert_eq!(val, decode_radix(radix, basis));