Write the program that does the following. Use semaphores.

- The main (parent) thread initializes an array of 3 integers to zero.

- The parent creates 3 children. Child i adds 1 to array[i], where i = 0, 1, 2. Order is not important.

- The parent waits for the children to finish adding, and then prints the values in the array.

- The children wait for the parent to finish printing and then repeats (adds 1 to an element of the array)

- Continues forever