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Sumit Kumar Profile
Sumit Kumar

@SumitKumar9128

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Following
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Backend developer with a passion for solving real-world problems. Maintaining my streak on GeeksforGeeks and LeetCode, one challenge at a time!

India
Joined February 2024
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@SumitKumar9128
Sumit Kumar
9 months
Excited to share that I won the 21-Day #geekstreak2024 Challenge with @DeutscheBank and @geeksforgeeks ,. This challenge motivated me to explore new challenges and grow my skills. Thank you for this amazing experience and the exclusive DB-sponsored bag! πŸŽ’
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@SumitKumar9128
Sumit Kumar
13 hours
πŸ”₯ Day 319 of #geekstreak2025.βœ… GFG POTD: Set Matrix Zeros.Used first row & column as markers to optimize space while handling zero positions smartly. #potd #gfg319 #dsa #matrix #geekstreak2025 #coding #java
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@SumitKumar9128
Sumit Kumar
2 days
πŸ”₯ Day 318 of #geekstreak2025.βœ… GFG POTD: Majority Element - More Than n/3.Used extended Boyer-Moore Voting Algorithm to find up to 2 potential candidates and validated them. #potd #gfg318 #dsa #java #geekstreak2025 #boyermoore
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@SumitKumar9128
Sumit Kumar
3 days
πŸ”₯ Day 317 of #geekstreak2025.βœ… GFG POTD: Max Circular Subarray Sum.Used a smart twist on Kadane’s β€”.πŸ“Œ Max = max(normalKadane, totalSum - minKadane).Handled edge case where all elements are negative. #potd #gfg317 #geekstreak2025 #dsa #java #kadanesalgorithm
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@SumitKumar9128
Sumit Kumar
4 days
πŸ”₯ Day 316 of #geekstreak2025.βœ… GFG POTD: Last Moment Before All Ants Fall Out.🧠 Intuition:.Ants fall when they reach either end of the plank. So, the last moment is simply the maximum time any ant takes to fall β€” whether it's going left or right. #geekstreak2025 #dsa #java
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@SumitKumar9128
Sumit Kumar
5 days
πŸ”₯ Day 315 of #geekstreak2025.βœ… GFG POTD: Sum of Subarrays. Brushed up the formula trick:.Each element contributes to multiple subarrays. So instead of brute force, used:. sum += arr[i] * (i + 1) * (n - i);. Saves time & avoids nested loops – total optimization win.#potd
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@SumitKumar9128
Sumit Kumar
6 days
🧡 Day 314 of #geekstreak2025.βœ… GFG POTD: Smallest Positive Missing Number. #dsa #array #potd #gfg314 #geekstreak2025
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@SumitKumar9128
Sumit Kumar
7 days
🧡 Day 313 of #geekstreak2025.βœ… GFG POTD: Count the Coprimes.🧠 Applied Euler’s Totient Function (phi) to count coprimes of n. Factored out primes and updated result using the standard phi formula. Clean & direct number theory! .#dsa #math #eulerstotient #numbertheory
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@SumitKumar9128
Sumit Kumar
8 days
🧡 Day 312 of #geekstreak2025.βœ… GFG POTD: Count Numbers Containing Specific Digits. πŸ” #dsa #math #digits #potd #gfg312 #geekstreak2025
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@SumitKumar9128
Sumit Kumar
9 days
🧡 Day 311 of #geekstreak2025.βœ… GFG POTD: Count Unique Vowel Strings.🧠 Counted frequency of each vowel in the string,.then multiplied all frequencies Γ— factorial of distinct vowels count. Used hashmap + frequency logic β€” worked clean! . #dsa #hashmap #math #string #potd
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@SumitKumar9128
Sumit Kumar
10 days
🧡 Day 310 of #geekstreak2025.βœ… GFG POTD: LCM Triplet.🧠 Applied direct formula based on parity of n β€”.took top 3 numbers ensuring they are co-prime or pairwise LCM-maximizing. Pure observation + math logic . πŸ” #dsa #math #numbertheory #lcm #potd #gfg310 #geekstreak2025
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@SumitKumar9128
Sumit Kumar
11 days
🧡 Day 309 of #geekstreak2025.βœ… GFG POTD: Power of k in Factorial of n.🧠 Broke k into prime factors,.then applied Legendre’s formula for each prime in n!. Summed up powers β€” clean number theory + math! .πŸ” #dsa #math #numbertheory #factorial #potd #gfg309 #geekstreak2025
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@SumitKumar9128
Sumit Kumar
12 days
🧡 Day 308 of #geekstreak2025.βœ… GFG POTD: Nine Divisors.🧠 Precomputed primes up to √N,.then counted numbers with exactly two distinct prime factors or a prime raised to the 8th power. Used sieve + combinatorics combo . #dsa #math #sieve #numbertheory #potd #gfg308
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@SumitKumar9128
Sumit Kumar
13 days
🧡 Day 307 of #geekstreak2025.βœ… GFG POTD: Divisible by 13. Simply used the classic modulo while parsing digits trick,.Processed left to right keeping (rem Γ— 10 + digit) % 13 β€” clean & efficient . πŸ” #dsa #modulo #math #string #potd #gfg307
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@SumitKumar9128
Sumit Kumar
14 days
🧡 Day 306 of #geekstreak2025.βœ… GFG POTD: Minimum Cuts for Special Substrings. Precomputed binary strings of powers of 5,.then used backtracking to try all valid splits minimizing cuts. Explored all partitions β€” classic recursion + set lookup! .#dsa #backtracking
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@SumitKumar9128
Sumit Kumar
15 days
🧡 Day 305 of #geekstreak2025.βœ… GFG POTD: Maximum Sum of Elements Not Part of LIS.🧠 First calculated total sum of array,.then found sum of elements in Longest Increasing Subsequence using DP. Answer = total βˆ’ LIS sum . LIS with a twist!. #dsa #dp #lis #array #potd
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@SumitKumar9128
Sumit Kumar
16 days
🧡 Day 304 of #geekstreak2025.βœ… GFG POTD: Gold Mine Problem.🧠 Used DP from right to left, exploring 3 possible directions.Stored max gold collectable from each cell β€” built up to the answer!.Dynamic programming done right! βœ…. #dsa #dp #2darray #matrix #potd
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@SumitKumar9128
Sumit Kumar
17 days
🧡 Day 303 of #geekstreak2025.βœ… GFG POTD: Trail of Ones. #dsa #maths #bitmanipulation #potd #gfg303 #geekstreak2025
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@SumitKumar9128
Sumit Kumar
18 days
🧡 Day 302 of #geekstreak2025.βœ… GFG POTD: Find the Longest String.🧠 Sorted strings by length,.then used a set to check if all prefixes exist β€” that’s the key to validity!.Picked longest + lex smallest if multiple valid ones. #dsa #string #hashset #sorting #potd
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@SumitKumar9128
Sumit Kumar
19 days
🧡 Day 301 of #geekstreak2025.βœ… GFG POTD: Sum of Subarray Minimums.🧠 Used monotonic stack to find previous and next smaller elements. Each element’s contribution = val Γ— (# of subarrays where it’s the min). Clean math, powerful stack. πŸ” #dsa #monotonicstack #array #math
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@SumitKumar9128
Sumit Kumar
20 days
🧡 Day 300 of #geekstreak2025.βœ… GFG POTD: Next Element with Greater Frequency
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