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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		 Scanner sc = new Scanner(System.in);
  13.  
  14.         int n = sc.nextInt(); // number of nodes
  15.         List<Integer>[] child = new List[n + 1];
  16.         for (int i = 1; i <= n; i++) {
  17.             child[i] = new ArrayList<>();
  18.         }
  19.  
  20.         // Read n-1 edges
  21.         for (int i = 1; i < n; i++) {
  22.             int u = sc.nextInt();
  23.             int v = sc.nextInt();
  24.             child[u].add(v);
  25.             child[v].add(u);
  26.         }
  27.         int [] value = new int[n+1];
  28.  
  29.         for(int i = 1;i <= n;i++){
  30.             value[i] = sc.nextInt();
  31.         }
  32.  
  33.         int[] used = new int[n + 1];
  34.         int[] parent = new int[n + 1];
  35.         int[] sum = new int[n + 1];
  36.  
  37.  
  38.         dfs(child, 1,value,used, parent,sum);
  39.     }
  40.  
  41.     public static void dfs(List<Integer>[] child, int node,int [] value,int[] used, int[] parent, int[] sum) {
  42.         used[node] = 1;
  43.  
  44.         for (int v : child[node]) {
  45.             if (used[v] == 0) {
  46.                 parent[v] = node;
  47.                 dfs(child, v,value,used, parent,sum);
  48.             }
  49.         }
  50.  
  51.         int subSum = 0;
  52.         for (int v : child[node]) {
  53.             if (v == parent[node]) continue;
  54.             subSum += sum[v];
  55.         }
  56.  
  57.         sum[node] = value[node] + subSum;
  58.         System.out.println(sum[node]);
  59. 	}
  60. }
Success #stdin #stdout 0.18s 54600KB
comments (?)
stdin 
5
1 2
1 3
3 4
3 5
1 2 3 4 5
stdout 
2
4
5
12
15
https://ideone.com/AxeUe9
language:
Java (12.0.1)
created:
7 days ago
visibility:
public

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