I would like to make a little comment regarding Task#1.

In the task is given that Giant could step over each K-th stair.

In this case, the answer to the question of how many stairs will Giant step in total is N - N/K.

(He steps over each K-th stair, then in total he steps over N/K stairs. That means that he steps N - N/K stairs.)

But, according to the given examples, he steps over K stairs on each step. In my code, I provide solution for this case.

• Task-1

g++ task1.cpp -o steps

./steps $N $K

• Task-2

g++ task2.cpp -o cables

./cables $N $D

• Task-3

g++ task3.cpp -o ls

./ls -la

./ls -l

./ls -a

• Task-4

g++ task4.cpp -o extract

./extract file.img somedir