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beyondyyh
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Leetcode
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master
Breadcrumbs
Leetcode
/
algorithms
/
myarray
/
26.removeDuplicates.go
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39 lines (35 loc) · 807 Bytes
master
Breadcrumbs
Leetcode
/
algorithms
/
myarray
/
26.removeDuplicates.go
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39 lines (35 loc) · 807 Bytes
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package
myarray
// 双指针法
// i慢指针,j快指针,i从0开始j从1开始,j先走
// 如果nums[j] = nums[i]说明是重复项,i不动,j继续往前走
// 直到nums[j] != nums[i]说明重复运动结束,i走一步,同时把nums[j]赋值给num[i]
// 时间复杂度:O(n)
func
removeDuplicates1
(
nums
[]
int
)
int
{
L
:=
len
(
nums
)
if
L
==
0
{
return
0
}
i
:=
0
// 慢指针i
for
j
:=
1
;
j
<
L
;
j
++
{
// 快指针j先走,直到重复运动结束,把nums[j]赋值给i+1,同时慢指针i走一步
if
nums
[
j
]
!=
nums
[
i
] {
nums
[
i
+
1
]
=
nums
[
j
]
i
++
}
}
return
i
+
1
}
func
removeDuplicates2
(
nums
[]
int
)
int
{
n
:=
len
(
nums
)
if
n
==
0
{
return
0
}
i
:=
0
for
j
:=
1
;
j
<
n
;
j
++
{
if
nums
[
j
]
!=
nums
[
i
] {
nums
[
i
+
1
]
=
nums
[
j
]
i
++
}
}
return
i
+
1
}
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