Editorials, video walkthroughs, and official C++ solutions across LeetCode, Codeforces, and CodeChef rounds.
Weekly & Biweekly contest problem video solutions and approach guides.
Div. 2, Div. 3 and Div. 4 rounds competitive programming walkthroughs.
Starters rounds and rated contest problem breakdowns with proofs.
| # | Problem Name | Platform | Contest | Difficulty | Solutions | Status | Actions |
|---|---|---|---|---|---|---|---|
| 1 | Minimum Threshold Path With Limited Heavy Edges #Binary Search#Shortest Path+2 |  LeetCode | Biweekly Contest 182 | Hard | Loading... | ||
| 2 | Minimum Generations to Target Point #Geometry#Array | LeetCode | Biweekly Contest 182 | Medium | Loading... | ||
| 3 | Minimum Flips to Make Binary String Coherent #String#Math | LeetCode | Biweekly Contest 182 | Medium | Loading... | ||
| 4 | Score Validator #String#Array+1 | LeetCode | Biweekly Contest 182 | Easy | Loading... | ||
| 5 | 3920. Maximize Fixed Points After Deletions #Dynamic Programming#Array+2 | LeetCode | Weekly Contest 500 | Hard | Loading... | ||
| 6 | 3919. Minimum Cost to Move Between Indices #Array#Suffix Array+2 | LeetCode | Weekly Contest 500 | Medium | Loading... | ||
| 7 | 3918. Sum of Primes Between Number and Its Reverse #Array#Math+1 | LeetCode | Weekly Contest 500 | Medium | Loading... | ||
| 8 | 3917. Count Indices With Opposite Parity #Array#Math | LeetCode | Weekly Contest 500 | Easy | Loading... | ||
| 9 | F. It Just Keeps Going Sideways #Array#Sorting+2 | Codeforces | Codeforces Round 1096 (Div. 3) | Expert | Loading... | ||
| 10 | E. It All Went Sideways #Array#Dynamic Programming+2 | Codeforces | Codeforces Round 1096 (Div. 3) | Specialist | Loading... | ||
| 11 | D. Palindromex #Math#Array+1 | Codeforces | Codeforces Round 1096 (Div. 3) | Specialist | Loading... | ||
| 12 | C. Snowfall #Math#Array | Codeforces | Codeforces Round 1096 (Div. 3) | Pupil | Loading... | ||
| 13 | B. Party Monster #String#Greedy | Codeforces | Codeforces Round 1096 (Div. 3) | Newbie | Loading... | ||
| 14 | A. Koshary #Math#Geometry | Codeforces | Codeforces Round 1096 (Div. 3) | Newbie | Loading... | ||
| 15 | 3911. K-th Smallest Remaining Even Integer in Subarray Queries #Prefix Sum#Array+1 | LeetCode | Biweekly Contest 181 | Advanced | Loading... | ||
| 16 | 3910. Count Connected Subgraphs with Even Node Sum #Graph#Bit Manipulation+1 | LeetCode | Biweekly Contest 181 | Hard | Loading... | ||
| 17 | 3909. Compare Sums of Bitonic Parts #Greedy#Array+1 | LeetCode | Biweekly Contest 181 | Medium | Loading... | ||
| 18 | 3908. Valid Digit Number #String#Math | LeetCode | Biweekly Contest 181 | Easy | Loading... | ||
| 19 | D. Beautiful Permutation #Array#Math+1 | Codeforces | Codeforces Round 1059 | Expert | Loading... | ||
| 20 | C. Beautiful XOR #Bit Manipulation#Bitmask+2 | Codeforces | Codeforces Round 1059 | Specialist | Loading... | ||
| 21 | B. Beautiful String #Array#String+1 | Codeforces | Codeforces Round 1059 | Pupil | Loading... | ||
| 22 | A. Beautiful Average #Array#Greedy | Codeforces | Codeforces Round 1059 | Newbie | Loading... | ||
| 23 | 3714. Longest Balanced Substring II #Hashing#Array+2 | LeetCode | Weekly Contest 471 | Hard | Loading... | ||
| 24 | 3713. Longest Balanced Substring I #Prefix Sum#String+3 | LeetCode | Weekly Contest 471 | Medium | Loading... | ||
| 25 | 3712. Sum of Elements With Frequency Divisible by K #Array#Hashing | LeetCode | Weekly Contest 471 | Easy | Loading... |
