Given N, the number of persons. The task is to arrange N person around a circular table.
Input: N = 4 Output: 6 Input: N = 5 Output: 24
Approach: It is the concept of Circular permutation i.e. there is no specific starting point in the arrangement, any element can be considered as the start of the arrangement.
For N = 4, Arrangements will be:
Below is the formula to find Circular permutations:
Circular Permutations = (N - 1)!
Below is the impplementation of above idea:
- Number of ways to arrange 2*N persons on the two sides of a table with X and Y persons on opposite sides
- Time taken by two persons to meet on a circular track
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- Puzzle | 1000 light bulbs switched on/off by 1000 persons passing by
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