Please help in C++

A Sudoku puzzle uses a 9 x 9 grid in which each column and row, as well as cach of ihe nin3 x 3 subrids,sit contain all of the dipiis1 9. Figue 4.19 presents an example of a valid Sudoku puzzle. This project consists of designing a multithreaded application that determines whether the solution to a Sudoku puzzle is valid. There are several different ways of multithreading this application. One suggested strategy is to create threads that check the following criteria: A thread to check that each column contains the digits 1 through 9 A thread to check that each row contains the digits 1 through 9 6 2 4 5 3 9 1 87 5 197 2 8 6 3 4 8 3 7 6 1 4 2 95 1 4 3 8 6 57 2 9 9 5 8 2 4 7 3 6 7 6 2 3 9 1 4 58 3 7 19 5 6 8 42 2 8 5 4 7 3 9 16 Figure 4.19 Solution to a 9 x 9 Sudoku puzzle. Nine threads to check that each of the 3 x 3 subgrids contains the digits 1 through 9