Greedy algorithms

Greedy algorithms often involve optimization and combinatorial problems. In greedy algorithms, the objective is to obtain the optimum solution from many possible solutions in each step. We try to get the local optimum solution, which may eventually lead us to obtain the global optimum solution. The greedy strategy does not always produce the optimal solution. However, the sequence of locally optimal solutions generally approximates the globally optimal solution.

For example, consider that you are given some random digits, say 1, 4, 2, 6, 9, and 5. Now you have to make the biggest number by using all the digits without repeating any digit. To create the biggest number from the given digits using the greedy strategy, we perform the following steps. Firstly, we select the largest digit from the given digits, and then append it to the number and remove the digit from the list until we have no digits left in the list. Once all the digits have been used, we get the...