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coder's snippet

7 h

#DailyCodingChallenge Day 271 Task: Count all index pairs where the first digit of nums[i] and the last digit of nums[j] are coprime. Solution: Extract first & last digits, check gcd(first, last) == 1 for every (i < j), and count all valid beautiful pairs. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 11

#DailyCodingChallenge Day 270 Task: Check if the array forms a valid permutation of [1…n-1, n, n]. Solution: Find the max value n, ensure array size is n+1, count frequencies, confirm 1…n–1 appear once and n appears twice. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 10

#DailyCodingChallenge Day 269 Task: Make the array sum divisible by k using minimum decrements. Solution: Find sum % k. If it’s 0, no change needed. Otherwise, that remainder itself is the number of operations required. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 9

#DailyCodingChallenge Day 268 Task: Count how many pairs (i, j) satisfy: nums1[i] is divisible by nums2[j] * k. Solution: Loop through both arrays, compute num2 * k, and increment the count whenever num1 % product == 0. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 9

#DailyCodingChallenge Day 267 Task: Convert a date (yyyy-mm-dd) into binary format without leading zeros. Solution: Split the date, convert year–month–day to binary using toBinaryString(), and join them back with dashes. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 7

#DailyCodingChallenge Day 266 Task: Split each word using a given separator and return only non-empty parts. Solution: Manually parse characters: build substrings, add them when hitting the separator, and skip empty results. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 6

#DailyCodingChallenge Day 265 Task: Determine who wins a coin-picking game where each move must total 115. Solution: Simulate turns: each round removes 1×75 + 4×10 coins. Whoever can't make the move loses. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 5

#DailyCodingChallenge Day 264 Task: Find the smallest number ≥ n whose digit product is divisible by t. Solution: Start from n, compute each number’s digit product, and return the first one divisible by t. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 4

#DailyCodingChallenge Day 263 Task: Decide if Alice can win by choosing either all single-digit numbers or all double-digit numbers. Solution: Sum single and double digits separately. Alice wins if either total is strictly greater than the other group. #LeetCode

coder's snippet

@coder_s_Snippet

Dec 3

#DailyCodingChallenge Day 262 Task: Count how many word pairs exist where one word is both a prefix and suffix of another. Solution: For every pair (i, j) with i < j, check if words[j] starts and ends with words[i]. If yes, count it. #LeetCode

coder_s_Snippet's tweet image. #DailyCodingChallenge
Day 262
Task: Count how many word pairs exist where one word is both a prefix and suffix of another.
Solution: For every pair (i, j) with i &lt; j, check if words[j] starts and ends with words[i]. If yes, count it.
#LeetCode

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