Leetcode with dani
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Mistakes are proof that you’re trying. Embrace every error as a lesson and keep moving forward
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The is the interview question I just had:
Given a binary array nums, return the maximum number of consecutive 1's in the array if you can flip at most one 0.
Example 1:
Input: nums = [1,0,1,1,0]
Output: 4
Explanation:
- If we flip the first zero, nums becomes [1,1,1,1,0] and we have 4 consecutive ones.
- If we flip the second zero, nums becomes [1,0,1,1,1] and we have 3 consecutive ones.
The max number of consecutive ones is 4.
max_cont= 4
max_count= 3
max_count =4
[1,0,1,1,0]
Example 2:
Input: nums = [1,0,1,1,0,1]
Output: 4
Explanation:
- If we flip the first zero, nums becomes [1,1,1,1,0,1] and we have 4 consecutive ones.
- If we flip the second zero, nums becomes [1,0,1,1,1,1] and we have 4 consecutive ones.
The max number of consecutive ones is 4.
Constraints:
1 <= nums.length <= 105
nums[i] is either 0 or 1.
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Given a string s consisting of lowercase letters only, return the length of the longest alphabetical continuous substring.
def longestContinuousSubstring(s: str) -> int:
Example 1:
Input: s = "abacaba"
Output: 2
Explanation: There are 4 distinct continuous substrings: "a", "b", "c" and "ab".
"ab" is the longest continuous substring.
Example 2:
Input: s = "abcde"
Output: 5
Explanation: "abcde" is the longest continuous substring.
Constraints:
1 <= s.length <= 10^5
s consists of only English lowercase letters.
"""
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"""
Given a binary array nums, return the maximum number of consecutive 1's in the array.
Example 1:
Input: nums = [1,1,0,1,1,1]
Output: 3
Explanation: The first two digits or the last three digits are consecutive 1s. The maximum number of consecutive 1s is 3.
Example 2:
Input: nums = [1,0,1,1,0,1]
Output: 2
Constraints:
1 <= nums.length <= 105
nums[i] is either 0 or 1.
"""
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You are given a sorted array nums of size n and an integer target.
Your task is to find the pair of numbers in the array whose sum is less than or equal to the target and has the largest possible sum.
Return the maximum sum of such a pair. If no valid pair exists, return -1.
Example 1:
Input: nums = [2, 3, 5, 8, 13], target = 10
Output: 10
l
[2, 3, 5, 8, 13],
r
[7,8 , 10]
Explanation: The pair (2, 8) has a sum of 10, which is the largest possible sum less than or equal to 10.
Example 2:
Input: nums = [1, 1, 1, 1], target = 1
Output: -1
Explanation: No pair has a sum less than or equal to 1.
Constraints:
1<=n<=10⁵
Nums is sorted in non-decreasing order.
def targetSum(nums , target):
left = 0
max_ = -1
right = len(nums)-1
while left < right:
sum = nums[left] + nums[right]
if sum == target:
return sum
elif sum > target:
right -=1
elif sum < target:
left += 1
max_ = max(max_,sum)
return max_1 262
You are given a 0-indexed string s consisting of only lowercase English letters, and an integer count. A substring of s is said to be an equal count substring if, for each unique letter in the substring, it appears exactly count times in the substring.
Return the number of equal count substrings in s.
A substring is a contiguous non-empty sequence of characters within a string.
Example 1:
Input: s = "aaabcbbcc", count = 3
Output: 3
Explanation:
The substring that starts at index 0 and ends at index 2 is "aaa".
The letter 'a' in the substring appears exactly 3 times.
The substring that starts at index 3 and ends at index 8 is "bcbbcc".
The letters 'b' and 'c' in the substring appear exactly 3 times.
The substring that starts at index 0 and ends at index 8 is "aaabcbbcc".
The letters 'a', 'b', and 'c' in the substring appear exactly 3 times.
Example 2:
Input: s = "abcd", count = 2
Output: 0
Explanation:
The number of times each letter appears in s is less than count.
Therefore, no substrings in s are equal count substrings, so return 0.
Example 3:
Input: s = "a", count = 5
Output: 0
Explanation:
The number of times each letter appears in s is less than count.
Therefore, no substrings in s are equal count substrings, so return 0
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another interview question
You are given a 0-indexed integer array nums.
Swaps of adjacent elements are able to be performed on nums.
A valid array meets the following conditions:
The largest element (any of the largest elements if there are multiple) is at the rightmost position in the array.
The smallest element (any of the smallest elements if there are multiple) is at the leftmost position in the array.
Return the minimum swaps required to make nums a valid array.
Example 1:
Input: nums = [3,4,5,5,3,1]
Output: 6
Explanation: Perform the following swaps:
- Swap 1: Swap the 3rd and 4th elements, nums is then [3,4,5,3,5,1].
- Swap 2: Swap the 4th and 5th elements, nums is then [3,4,5,3,1,5].
- Swap 3: Swap the 3rd and 4th elements, nums is then [3,4,5,1,3,5].
- Swap 4: Swap the 2nd and 3rd elements, nums is then [3,4,1,5,3,5].
- Swap 5: Swap the 1st and 2nd elements, nums is then [3,1,4,5,3,5].
- Swap 6: Swap the 0th and 1st elements, nums is then [1,3,4,5,3,5].
It can be shown that 6 swaps is the minimum swaps required to make a valid array.
Example 2:
Input: nums = [9]
Output: 0
Explanation: The array is already valid, so we return 0.
Constraints:
1 <= nums.length <= 10^5
1 <= nums[i] <= 10^51 262
i am not sure but i heard a news that the G6 result will be announced at the end of next week? did u get the info?
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Repost from A2SV - Discussion
Hello fellow coders,
After a brief break, we've returned! Get ready for our fun weekly community coding contest happening every Saturday 🗓. It's your chance to compete with other awesome programmers, learn more about coding, and, most importantly, have a great time! 🥳
🏆 Contest Details:
📅 Date: December 28, 2024
⏰ Time: 6:00 PM
🔗 Link for Contest: Community Weekly Contest - Contest No 7
P.S. Remember to fill out this form to secure your spot for our upcoming community classes and lectures. It’s your golden ticket to enriching experiences you won’t want to miss. 📚✨
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2461. Maximum Sum of Distinct Subarrays With Length K
You are given an integer array nums and an integer k. Find the maximum subarray sum of all the subarrays of nums that meet the following conditions: The length of the subarray is k, and All the elements of the subarray are distinct. Return the maximum subarray sum of all the subarrays that meet the conditions. If no subarray meets the conditions, return 0. A subarray is a contiguous non-empty sequence of elements within an array. Example 1: Input: nums = [1,5,4,2,9,9,9], k = 3 Output: 15 Explanation: The subarrays of nums with length 3 are: - [1,5,4] which meets the requirements and has a sum of 10. - [5,4,2] which meets the requirements and has a sum of 11. - [4,2,9] which meets the requirements and has a sum of 15. - [2,9,9] which does not meet the requirements because the element 9 is repeated. - [9,9,9] which does not meet the requirements because the element 9 is repeated. We return 15 because it is the maximum subarray sum of all the subarrays that meet the conditions Example 2: Input: nums = [4,4,4], k = 3 Output: 0 Explanation: The subarrays of nums with length 3 are: - [4,4,4] which does not meet the requirements because the element 4 is repeated. We return 0 because no subarrays meet the conditions. Constraints: 1 <= k <= nums.length <= 105 1 <= nums[i] <= 105
