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leetcode-algorithms/src/ContainsDuplicate.java at master · anishLearnsToCode/leetcode-algorithms · GitHub
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ContainsDuplicate.java
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ContainsDuplicate.java
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// https://leetcode.com/problems/contains-duplicate
// T: O(N)
// S: O(N)
import
java
.
util
.
HashSet
;
import
java
.
util
.
Set
;
public
class
ContainsDuplicate
{
public
static
boolean
containsDuplicate
(
int
[]
array
) {
Set
<
Integer
>
elements
=
new
HashSet
<>();
for
(
int
element
:
array
) {
if
(
elements
.
contains
(
element
)) {
return
true
;
}
elements
.
add
(
element
);
}
return
false
;
}
}
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