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yanglr
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leetcode-ac
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master
Breadcrumbs
leetcode-ac
/
cpp-leetcode
/
leetcode1004-max-consecutive-ones-iii_sliding_window1.cpp
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master
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leetcode-ac
/
cpp-leetcode
/
leetcode1004-max-consecutive-ones-iii_sliding_window1.cpp
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#
include
<
vector
>
#
include
<
algorithm
>
#
include
<
iostream
>
using
namespace
std
;
class
Solution
{
public:
int
longestOnes
(vector<
int
>& nums,
int
k) {
const
int
N = nums.
size
();
int
i =
0
;
//
i: 滑动窗口左边界, 固定右边界, 移动左边界
int
count =
0
;
//
已经使用了多少次反转次数
int
res =
0
;
//
res: max len
for
(
int
j =
0
; j < N; j++)
{
if
(nums[j] ==
1
)
//
新加入窗口右侧的数是1, 不需要使用反转次数
res =
max
(res, j - i +
1
);
else
{
count++;
while
(count > k)
//
此时使用的反转次数超了, 需要移动左边界, 直到窗口使用的反转次数减小回到k为止
{
if
(nums[i] ==
0
)
count--;
i++;
}
res =
max
(res, j - i +
1
);
}
}
return
res;
}
};
//
Test
int
main
()
{
Solution sol;
vector<
int
> nums = {
1
,
1
,
1
,
0
,
0
,
0
,
1
,
1
,
1
,
1
,
0
};
int
k =
2
;
auto
res = sol.
longestOnes
(nums, k);
cout << res << endl;
return
0
;
}
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