Joined Subarrays on Tree SOLUTIONS JTSARTR

Joined Subarrays on Tree SOLUTIONS JTSARTR

Alice thought of a capacity $F$, which takes a subjective cluster of numbers $A = (A_1, A_2, ldots, A_M)$ as the main contention and is characterized in the accompanying manner: 

Consider all sets of subarrays $(A_i, A_{i+1}, ldots, A_j)$ and $(A_k, A_{k+1}, ldots, A_l)$ with the end goal that: 

$1 le I le j lt k le l le M$ both subarrays are non-diminishing $A_j le A_k$ In the event that there is no such pair of subarrays, $F(A) = 0$. 

Something else, $F(A)$ is the limit of the articulation $(j-i+1) + (l-k+1)$ over all such combines of subarrays. 

At the end of the day, you have to pick two non-covering non-void subarrays of $A$ and connect them in a similar request; the subsequent cluster ought to be non-diminishing and $F(A)$ is its most extreme conceivable length. 

Bounce moved Alice to tackle the accompanying issue and she needs your assistance. 

You are given a tree with $N$ vertices (numbered $1$ through $N$), established at the vertex $1$. There is a number written in every vertex; for each substantial $i$, how about we signify the whole number written in vertex $i$ by $V_i$. You ought to pick one vertex ― how about we indicate it by $v$. At that point, consider a cluster $A$ containing values which are written in vertices on the way from the root to $v$ (comprehensive), in a specific order, and figure $F(A)$. Locate the most extreme conceivable estimation of $F(A)$ which you can get thusly. 

 

Info 

The main line of the information contains a solitary whole number $T$ signifying the quantity of experiments. The portrayal of $T$ experiments follows. 

The primary line of each experiment contains a solitary whole number $N$. 

The subsequent line contains $N$ space-isolated numbers $V_1, V_2, cdot, V_N$. 

Every one of the accompanying $N-1$ lines contains two space-isolated numbers $u$ and $v$ meaning that vertices $u$ and $v$ are associated by an edge. 

 

Yield 

For each experiment, print a solitary line containing one number ― the limit of $F(A)$. 

 

Imperatives 

$1 le T le 1,000$ 

$2 le N le 5 cdot 10^5$ 

$|V_i| le 10^9$ for each substantial $i$ 

$1 le u, v le N$ 

the entirety of $N$ over all experiments doesn’t surpass $10^6$ 

 

Model Input 

2 1 5 3 

1 2 

1 3 

3 4 

 

Model Output 

 

Clarification 

Model case 1: We pick $v = 3$. At that point, $A(3) = (2, 5)$; its subarrays $(2)$ and $(5)$ fulfill every single required condition and the aggregate of their lengths is $2$. Its absolutely impossible to get a more noteworthy estimation of the capacity $F$.

Related:

March Long Challenge 2021 Solutions

April Long Challenge 2021 Solutions

Codechef Long Challenge Solutions

February Long Challenge 2021

1. Frog Sort Solution Codechef

2. Chef and Meetings Solution Codechef

3. Maximise Function Solution Codechef

4. Highest Divisor Solution Codechef

5. Cut the Cake Challenge Solution Codechef

6. Dream and the Multiverse Solution Codechef

7. Cell Shell Solution Codechef

8. Multiple Games Solution Codechef

9. Another Tree with Number Theory Solution Codechef

10. XOR Sums Solution Codechef

11. Prime Game Solution CodeChef

12. Team Name Solution Codechef

January Long Challenge 2021

November Challenge 2020 SOLUTION CodeChef

October Lunchtime 2020 CodeChef SOLUTIONS

RELATED :

Related :

Related :

Leave a Comment