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In this we have to return the duplicate number in the array. Array list contains numbers from 0 to N-2 where N is size of array. So we have done the sum of natural numbers and subtract it from sum of array elements.
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@mandliya sir/mam please have a look:) |
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@kelin448111043 sir/mam please have a look :) |
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In this we have to return the duplicate number in the array. Array list contains numbers from 0 to N-2 where N is size of array. So we have done the sum of natural numbers and subtract it from sum of array elements.