Why Sir took j=m-2? Please tell about that

#1

Why Sir took j=m-2? Why Sir took j=m-2? Please tell about that.

#2

hello @cbcao263
because last row ( i,e row with index j-1) . is already containing suffix sum.
so thats why bhaiya is starting iteration from second last row(ie row with index j-2)

#3

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