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NICEBTRE - Nice Binary Trees |
Binary trees can sometimes be very difficult to work with. Fortunately, there is a class of trees with some really nice properties. A rooted binary tree is called “nice”, if every node is either a leaf, or has exactly two children.
For example, the following tree is nice,
but the following tree is not.
The leaves of a nice binary tree are labeled by the letter ‘l’, and other nodes are labeled by the letter ‘n’.
Given the pre-order traversal of a nice binary tree, you are required to find the depth of the tree.
Notes:
- The depth of a tree is defined as the length of the longest path with one end at the root.
- The pre-order traversal of the tree in the first image above produces the string “nlnnlll”.
Input
The first line contains the number of test cases T. T lines follow. Each line contains a string, which represents the pre-order traversal of a “nice” binary tree. Leaves are represented by the letter ‘l’ and other nodes by the letter ‘n’. The input is guaranteed to be the preorder traversal of a nice binary tree.
Output
Output one line for each test case, containing a single integer, the depth of tree.
Constraints
0 < T < 20
Length of the input string in each test case is at most 10000.
Example
Input: 3 l nlnll nlnnlll Output: 0 2 3
Added by: | Anil Shanbhag |
Date: | 2013-01-17 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
hide comments
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2013-08-18 16:28:20 Alien
easy prob.... |
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2013-07-01 23:13:31 rishabhshinghal
AC in first attempt:P |
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2013-06-02 10:08:24 Atul Kumar Verma
Very Nice Question :) |
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2013-05-14 12:11:44 Anuj_LuckFove!
one beautiful concept of traversal in trees.. and AC :P |
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2013-03-11 17:23:01 K.P.
Any tricky test case...? |
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2013-03-10 17:17:01 Monkey D. Luffy
any tricky test case ?? |
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2013-02-02 12:13:56 Amrit
id 8640086 ? tricky cases plz?? |
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2013-01-27 04:09:26 shadoww
@Anil can you check sol 8594086 why its giving wrong answer :( Any tricky test cases ??? Finally Got AC :).. Last edit: 2013-01-28 08:47:55 |
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2013-01-23 13:45:57 (Tjandra Satria Gunawan)(曾毅昆)
183B in python3... :-) EDIT: 178B EDIT2: 0.00s in python2 ;-) edit: you are really cocky man, this problem is not that complex Last edit: 2013-02-27 01:19:45 |