We know the formula for n C r n C r fact n fact r x fact n-r Here fact means factorial. Following implementation uses above formula to calculate C n k. C n r n n-1.
The Combinations Calculator will find the number of possible combinations that can be obtained by taking a sample of items from a larger set.
Here modIverse means modular inverse under modulo p. N C r n C n r Then we use the smallest term between r and n r. This tutorial demonstrates how you can quickly find the number of ways to combine a selected amount of items. Public class JavaProgram public static int fact int num int fact1 i.