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:
$Result = $Result * $n;
// Driver Code
$n = 4;
echo Circular($n – 1);
// This code is contributed by mits
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