#include <iostream>

 template<typename... Args>
 bool allLeft(Args... args) { return (true && ... && args); }

 template<typename... Args>
 bool allRight(Args... args) { return (args && ... && true); }

 int main(){

   std::cout << std::boolalpha;

   std::cout << "allLeft(): " << allLeft() << std::endl;
   std::cout << "allRight(): " << allRight() << std::endl;

   std::cout << "allLeft(true): " << allLeft(true) << std::endl;
   std::cout << "allRight(true): " << allRight(true) << std::endl;


   std::cout << "allLeft(true, true, true, false): " << allLeft(true, true, true, false) << std::endl;
   std::cout << "allRight(true, true, true, false): " << allRight(true, true, true, false) << std::endl;

 }