Boring Class

In a boring class at XYZ college, students tend to fall asleep easily. In the class at any second, a student sitting at some place sleeps if there is a person sitting at a Manhattan distance less than $d$ in the previous second or if the seat is a blind spot. The Manhattan distance $d$ between two points is measured as |$X_2$-$X_1$| + |$Y_2$-$Y_1$|. You are given a 2-D matrix which represents th