In this problem, we will discuss the combinations of alphabets that occurred by pressing the numbers on the phone keypad, and this problem is solved in C++.
It's a problem of 2-D DP of knapsack in C++, in which the weight W and a set of n items with some value's, needs to calculate the maximum amount of a profit from these set of items.
In this module, we will discuss certain problems like Rat in a Maze, N-Queen, and Sudoku Solver with the help of backtracking in C++.