There was a set of cards with numbers from 1 to N .One of the card is now lost .

Question

Determine the number on that lost card given the numbers for the remaining cards.
Given a number N ,followed by Nㄧ1 intergers representing the numbers on the remaining cards (distinct intergers in the range from 1 to N).Find and print the number on the lost card.
Ex input:3 #3 rows
3
2
output:1
Could someone do it for me?

Answer 1

No, but you can show us your approach, explain where exactly you have diffculties to complete the task and we will help you.