Sanitization is must

VIIT college is an list of size n. There are sanitation sprayers in some places of the list. The i-th element of the list is 1 if there is a sprayers in the position i, otherwise the i-th element of the list is 0. Each sprayers has a value r the sprayers at the position p can sanitize up all the places from and to in range [p−r+1;p+r−1]. VIIT management likes to walk through the college while th