AGGRCOW - Aggressive cows
Farmer John has built a new long barn, with N (2 <= N <= 100,000)
stalls. The stalls are located along a straight line at positions
x1,...,xN (0 <= xi <= 1,000,000,000).
His C (2 <= C <= N) cows don't like this barn layout and become aggressive towards each other once put into a stall. To prevent the cows from hurting each other, FJ wants to assign the cows to the stalls, such that the minimum distance between any two of them is as large as possible. What is the largest minimum distance?
t – the number of test cases, then t test cases follows.
* Line 1: Two space-separated integers: N and C
* Lines 2..N+1: Line i+1 contains an integer stall location, xi
For each test case output one integer: the largest minimum distance.
1 5 3 1 2 8 4 9
FJ can put his 3 cows in the stalls at positions 1, 4 and 8,
resulting in a minimum distance of 3.
The largest minimum distance means ====> there are a lot of distances which you can maintain between the cows while placing them in the barn. In this problem, you just have to find the maximum among those possible distances.
I have a solution but I am getting WA. It is a combination of binary search and priority queue. Does anyone have a list of tricky testcases?
One hell of a question that was. Wow !!! Really nice question on binary search. Tried it for 2 days.
for reference see https://www.geeksforgeeks.org/place-k-elements-such-that-minimum-distance-is-maximized/Last edit: 2020-11-29 05:13:10
good question of binary search for beginners
got an AC :)
Guys, those of you who are finding it overwhelming or unsolvable I want to say take a break and do it again. No matter how long of a break you need, sometimes a fresh perspective comes with time. I tried this question 6 months ago, that time I even wasn't able to understand the discrete binary search approach. After a few days, I understood the concept then coded it, but the code didn't work. I gave up that time feeling overwhelmed. Now today, after 6 months I tried again. This time I got it! :D
What does "largest minimum" distance even means? Isn't largest and minimum conflicting?
binary search on answers :)
Those who got AC, kindly check this test case...