number of rectangles in this square of 3X3

answer is 22..?
can anyone explain how

for(int rect_width=1;rect_width

Question

number of rectangles in this square of 3X3

answer is 22..?
can anyone explain how

for(int rect_width=1;rect_width<=width;rect_width++)
    for(int rect_height=1;rect_height<=height;rect_height++) {
        if (rect_width==rect_height) continue; // Don't count squares!
for(int left=0;left<=width-rect_width;left++)
            for(int top=0;top<=height-rect_height;top++)
                count++;

i couldnot understand this

anonymous · Answer

here width=3 and height=3

nikita2 · Answer

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You should calculate suchh `