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algorithm/Week_02/id_129/LeetCode_671_129.java at master · feixiangcode/algorithm · GitHub
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algorithm
/
Week_02
/
id_129
/
LeetCode_671_129.java
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25 lines (22 loc) · 681 Bytes
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algorithm
/
Week_02
/
id_129
/
LeetCode_671_129.java
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25 lines (22 loc) · 681 Bytes
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public
class
LeetCode_671_129
{
public
int
findSecondMinimumValue
(
TreeNode
root
) {
if
(
root
==
null
|| (
root
.
left
==
null
&&
root
.
right
==
null
)) {
return
-
1
;
}
int
left
=
root
.
left
.
val
;
int
right
=
root
.
right
.
val
;
if
(
root
.
left
.
val
==
root
.
val
) {
left
=
findSecondMinimumValue
(
root
.
left
);
}
if
(
root
.
right
.
val
==
root
.
val
) {
right
=
findSecondMinimumValue
(
root
.
right
);
}
if
(
left
!= -
1
&&
right
!= -
1
) {
return
Math
.
min
(
left
,
right
);
}
else
if
(
left
!= -
1
) {
return
left
;
}
else
{
return
right
;
}
}
}
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