C++ Program to Count Combinations with Constraints

The program prompts the user to enter 5 integers: 'x', 'y', 'z', 'n', and 'm'. It then loops through all possible combinations of 'a', 'b', and 'c' (where 'a', 'b', and 'c' represent the number of items of type 'x', 'y', and 'z' respectively) such that 'a + b + c <= m'. For each combination, it checks if the sum of 'xa + yb + z*c' is equal to 'n'. If it is, it increments the 'count' variable. Finally, it prints out the value of 'count'.

This program is trying to find the number of ways to choose a number of items of each type 'x', 'y', and 'z' such that the total number of items is equal to 'n', and the number of items of each type does not exceed 'm'.