Find sum of series 1+2+8+26+80+…….+n

we can not define 1+2+8+26+80+.......... series in a simple manner to write  program. But..... 2,8,26,80,242.................can be define as below The way to discover the next term is multiply the next number by 2 and then add it on. i.e. the next number of 2 is 3 so, 3*2=6+2=8 9*2=18+8=26 27*2=54+26=80........ and so on             OR … Continue reading Find sum of series 1+2+8+26+80+…….+n

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Set .add()

Task Apply your knowledge of the .add() operation to help your friend Rupal. Rupal has a huge collection of country stamps. She decided to count the total number of distinct country stamps in her collection. She asked for your help. You pick the stamps one by one from a stack of N country stamps. Find … Continue reading Set .add()

Find the Second Largest Number

You are given N numbers. Store them in a list and find the second largest number. Input Format The first line contains N. The second line contains an array A[] of N integers each separated by a space.     if __name__ == '__main__': n = int(input()) arr = map(int, input().split()) print(sorted(list(set(arr)))[-2])