Solve problem "Lost card" online - Learn Python 3 - Snakify

# Lost card

## Statement

There was a set of cards with numbers from 1 to N. One of the card is now lost. Determine the number on that lost card given the numbers for the remaining cards.

Given a number N, followed by N − 1 integers - representing the numbers on the remaining cards (distinct integers in the range from 1 to N). Find and print the number on the lost card.

In all the problems input the data using input() and print the result using print().