It is correct to state that a bit can be in one of 2 states, either 1 or 0.
A bit is is a single binary digit. A bit can either be "1" or "0".
We stated that It is correct to indicate that a bit can be in one of 2 states, either 1 or 0. This indicates that 2ⁿ strings must be created in total. The string must then be processed twice.
Hence, Our time is now O(2ⁿ⁺¹) = O(2ⁿ)
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