for example 1 2 3 4 5 6 7 8 9 9
So there are 10 number with all the 9 unique numbers. So find the sum of 9 numbers 9*(9+1)/2 = 45 Find the sum of the given array 54 Subtract 54 -45 you will get the answer. but this work if all the number from 1 to n-1 are there in the array. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/algogeeks -~----------~----~----~----~------~----~------~--~---
