write a program in C that uses the value n from the command line argument and converts it to an integer

Next it creates two threads using pthread_create()

then the main thread computes the sum of square roots 1 to n/3, while two child threads compute the sum of the square roots from n/3 +1 to 2n/3+1 and 2n/3+1 tp n respectively.

all partial sums should be added together to a shared global variable by each thread at the end of execution

the main thread calls pthread_join to wait for the termination.