#include <bitset>
#include <iostream>
 
int main() {
    const std::bitset<8> b1 { "1010101011", 4};  // les 4 premiers caractères = "1010"
    std::cout << b1 << std::endl;
    
    const std::bitset<8> b2 { "1010101011", 8};  // les 8 premiers caractères = "10101010"
    std::cout << b2 << std::endl;
}