1.

https://www.youtube.com/watch?v=gYmWHvRHu-s inputBook = 10 20 30 40 inputStudent = 2 assign book to each students in all possible way and find max Then find mix of max eg.

https://www.youtube.com/watch?v=9fI_26Dl1IA.

find distinct element count in each window window size 4 []int{1, 2, 2, 3, 4, 4, 5, 4} window1: 1, 2, 2, 3 --> unique 3 window2: 2, 2, 3, 4 --> unique 3 window3: 2, 3, 4, 4 -> unique 3 window4: 3, 4, 4, 5 - unique 3 window5: 4, 4, 5, 4 - unique 2 total 5 window: */.

input: 6, 20, 10, 15, -10, 10 target sum : 5 output: index of 15 and -10 */.