diff between / and //
// gives an integer value while / gives a float.
easy way to memorise is that double slash (//) cuts the original float result even more to an integer.
/ ok its float
// oh slash 1 more time? it cuts off the decimal place and becomes int.
7 / 2 = 3.5
-7 / 2 = -3.5
// (Floor Division): Returns an integer. It divides and then "floors" the result, meaning it rounds down to the nearest integer.
7 // 2 = 3 (floor of 3.5 is 3)
-7 // 2 = -4 (floor of -3.5 is -4, not -3! This is crucial for negative numbers)
U have to know the diff, especially in bisect and bisect left conditions
https://velog.io/@whitehousechef/Leetcode-2040.-Kth-Smallest-Product-of-Two-Sorted-Arrays
math.ceil()
takes a float and rounds up. So instead of math.ceil(a//b) which the value inside bracket will be an int, we should do math.ceil(a/b) to properly get a float so that we round up
