Need more efficient solution

one test case is failing. need more efficient solution

hello @rick711c

that bitmask approach is the most efficient solution for this problem

pls share ur code with me

can you please give an idea about the bitmask approch

pls chck this out->

one test case is failing

there is no link of the video …can you please share it again

link -> https://www.youtube.com/watch?v=tMRZ6gqFYdg

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