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leetcode-algorithms/src/BalancedBinaryTree.java at master · anishLearnsToCode/leetcode-algorithms · GitHub
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leetcode-algorithms
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src
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BalancedBinaryTree.java
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leetcode-algorithms
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src
/
BalancedBinaryTree.java
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public
class
BalancedBinaryTree
{
public
static
boolean
isBalanced
(
TreeNode
root
) {
return
height
(
root
) != -
1
;
}
private
static
int
height
(
TreeNode
root
) {
if
(
root
==
null
) {
return
0
;
}
int
leftDepth
=
height
(
root
.
left
);
int
rightDepth
=
height
(
root
.
right
);
if
(
leftDepth
== -
1
||
rightDepth
== -
1
||
Math
.
abs
(
rightDepth
-
leftDepth
) >
1
) {
return
-
1
;
}
return
1
+
Math
.
max
(
leftDepth
,
rightDepth
);
}
}
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