Chef and Portal

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Chef once fell through a portal and landed on world of computers.There were many portals through which he can comeback to his world. If he goes through a wrong portal he would die.The only portals through which he can comeback to this world is when the portal number is even.The problem is, since he is in land of computers everything was in binary and chef can only understand decimal numbers.Fortun

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solution.cppC++17

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