ADASALES - Ada and Travelling Salesman
Ada the Ladybug lives in Bugladesh. It is a very specific country - there are plenty of cities, but since the goverment doesn't "waste" money, there is only one simple path between each pair of cities.
Ada is working as Traveling Salesman. She travels between cities, buying and selling products. A product has fixed price in each city (same for buy/sale). Since Ada travels with bike (to avoid payments for travels) so she can carry at most one item at a moment.
She is currently in some city, and she wants to choose such city, that she will make as much money as possible by travelling to that city (by simple path). Can you help her?
The first line will contain 0 < N ≤ 105, 0 < Q ≤ 5*105, number of cities and number of queries respectively.
Then one line with N integers follow, 1 ≤ Ai ≤ 109, the price in ith city.
Afterward N-1 lines follow, each containing two numbers 0 ≤ i,j < N (i ≠ j), meaning that there is a simple path between city i and city j.
Then Q lines follows, each containing exactly one integer 0 ≤ i < N- the city in which Ada begins.
Print Q lines, the maximal amount of money, Ada can earn.
6 6 1 2 3 4 5 4 1 0 1 2 1 3 3 4 4 5 0 1 2 3 4 5
4 3 3 1 1 2
5 2 1 5 2 4 3 0 1 1 2 2 3 3 4 0 2
Output explanations [Possible destination cities of first example input]
4 4 4 2 2 2
Note that some of the destinations might have ended somewhere else, but it would result in same income!
I'm a fagLast edit: 2021-01-29 16:03:05
@morass I don't get why there can be more queries than there are cities. Does it have to be a different ending city than a previous one, or just repeat the same answer? It would be clear if the examples showed such a case.Last edit: 2021-01-25 00:47:20
My first problem with DP on trees.AC in one go.
Statement is poorly worded, had to analyze sample cases to understand what we're asked to do.
@Morass does ada initially has a product to sell when she is at the starting city or she must buy a product and then sell?
@Morass: Hi! Could you please give me some hint on test-case 13? It's failing in that case. You could see my latest submission. thanks!
This is the code for this problem : http://bit.ly/2M6Vb5F
can anybody explain it a little bit unable to understand the output what exactly we have to print.??
Hi @morass . Can you once have a look at my code? I am getting TLE but I don't know why. This is the second time I coded in out dp and got a TLE. But I am not understanding the reason. Seems O(N) to me. Can you please help
Can't understand what question wants us to print!! Question is unclear to me.