The dice problem
You are given a cubic dice with 6 faces. All the individual faces have a number printed on them. The numbers are in the range of 1 to 6, like any ordinary dice. You will be provided with a face of this cube, your task is to guess the number on the opposite face of the cube.
Input: N = 2
For dice facing number 5 opposite face will have the number 2.
Input: N = 6
Naive Approach: In a normal 6 faced dice, 1 is opposite to 6, 2 is opposite to 5, and 3 is opposite to 4. Hence a normal if-else-if block can be placed
Approach: The idea is based on the observation that the sum of two opposite sides of a cubical dice is equal to 7. So, just subtract the given N from 7 and print the answer.
Below is the implementation of the above approach:
Time Complexity: O(1)
Auxiliary Space: O(1)