diff options
Diffstat (limited to 'num_nodes_sub_tree.rs')
-rw-r--r-- | num_nodes_sub_tree.rs | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/num_nodes_sub_tree.rs b/num_nodes_sub_tree.rs deleted file mode 100644 index ca52f7b..0000000 --- a/num_nodes_sub_tree.rs +++ /dev/null @@ -1,39 +0,0 @@ -use std::collections::{HashMap, HashSet}; -struct Solution; - -impl Solution { - pub fn count_sub_trees(n: i32, edges: Vec<Vec<i32>>, labels: String) -> Vec<i32> { - let mut map = HashMap::<usize, Vec<usize>>::new(); - for e in &edges { - map.entry(e[0] as usize).or_default().push(e[1] as usize); - map.entry(e[1] as usize).or_default().push(e[0] as usize); - } - let mut visited = HashSet::<usize>::new(); - let mut ans = vec![0; n as usize]; - Self::dfs(n, &mut map, &labels, 0, &mut visited, &mut ans); - ans - } - fn dfs(n: i32, map: &mut HashMap<usize, Vec<usize>>, labels: &str, - x: usize, visited: &mut HashSet<usize>, ans: &mut Vec<i32>) -> [i32; 26] { - let mut vec = [0;26]; - if visited.insert(x) { - for e in map.entry(x).or_default().clone() { - let v = Self::dfs(n, map, labels, e, visited, ans); - for i in 0..26 { - vec[i] += v[i] - } - } - let ch = labels.as_bytes()[x]; - vec[(ch - b'a') as usize] += 1; - ans[x] = vec[(ch - b'a') as usize]; - } - vec - } -} - -fn main() { - let edges = vec![vec![0,1],vec![0,2],vec![1,4], - vec![1,5],vec![2,3],vec![2,6]]; - print!("{:?}", Solution::count_sub_trees(7, edges, String::from("abaedcd"))); - //expect: [2,1,1,1,1,1,1] -} |