Magic Number

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Ashish is jealous of Harsh and his friends because they have bitten him in puzzle competition. Ashish is satisfied with result competition. He wants insult them infront of every one so he come up with following puzzle to ask one of Harsh$`$s friends (that`s you). You find a count of magic number in the range [$L$, $R$]. Magic number form by sum of numbers all the subsequences that can be formed

HINT LADDERno hints yet

L1 Observation

L2 Technique

L3 Approach

L4 Pseudo-code

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L5 Full solution

L5 unlocks only if you insist twice

solution.cppC++17

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