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Diffstat (limited to 'continuous_subarray.py')
-rw-r--r-- | continuous_subarray.py | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/continuous_subarray.py b/continuous_subarray.py new file mode 100644 index 0000000..7e0505f --- /dev/null +++ b/continuous_subarray.py @@ -0,0 +1,34 @@ +# 2762. Continuous Subarrays + +""" +you are given a 0-indexed integer array 'nums'. a subarray of 'nums' is +called continuous if: let 'i', 'i + 1', ..., 'j' be the indices in the +subarray. then, for each pair of indices 'i <= i_1, i_2 <= j', '0 <= | +nums[i_1] - nums[i_2]| <= 2'. return the total number of continuous +subarrays. a subarray is a contiguous non-empty sequence of elements within +an array +""" + + +class Solution(object): + def continuousSubarrays(self, nums): + """ + :type nums: List[int] + :rtype: int + """ + i, ans, d = 0, 0, dict() + for j, n in enumerate(nums): + t = d.copy() + for k, v in t.items(): + if abs(k - n) > 2: + i = max(i, v + 1) + d.pop(k) + d[n] = j + ans += j - i + 1 + return ans + + +if __name__ == "__main__": + obj = Solution() + print(obj.continuousSubarrays(nums=[5, 4, 2, 4])) + print(obj.continuousSubarrays(nums=[1, 2, 3])) |