https://github.com/shahjalalshohag/problem-setting
https://github.com/shahjalalshohag/problem-setting
Last synced: 28 days ago
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- Host: GitHub
- URL: https://github.com/shahjalalshohag/problem-setting
- Owner: ShahjalalShohag
- Created: 2021-02-03T08:14:27.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2025-08-06T18:59:56.000Z (2 months ago)
- Last Synced: 2025-08-06T20:42:48.948Z (2 months ago)
- Size: 40 KB
- Stars: 15
- Watchers: 2
- Forks: 8
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Problem-Setting
This repository contains a comprehensive collection of competitive programming and math problems I have authored across multiple platforms. Each problem includes detailed information about tags, difficulty, source contests, and creation dates.
**Total Problems: 100+** (including private problems)
## Platforms
- **CodeForces**: https://codeforces.com
- **CodeChef**: https://www.codechef.com
- **Toph**: https://toph.co
- **IUPC**: IUPCs (Inter University Programming Contests) are national-level programming contests organized by universities in Bangladesh; this is similar to ICPC.
- **BCS**: BCS is the largest Competitive Programming Discord Community Server of Bangladesh. They host custom contests sometimes. Link: https://therealbcs.com
- **HackerRank**: https://www.hackerrank.com
- **International Math Olympiad**: https://www.imo-official.org
**Note:** If clicking on the problem links doesn't work directly, please copy the URL and paste it into your browser's address bar manually. This is due to a known issue with Codeforces Gym redirections.
## International Math Olympiad
Created the first shortlist problem from Bangladesh in IMO 2021.
- [Problem A3](https://www.imo-official.org/problems/IMO2021SL.pdf)
## All Problems
| # | Title | Tags | Source | Platform | Created on |
| --- | ---------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------- | ---------- | ----------- |
| 83 | [Substring Symphony](https://codeforces.com/gym/105973/problem/H) | `Suffix Array`, `Data Structures`, `Binary Search` | [Uttara University Inter-University Programming Contest](https://toph.co/c/uttara-university-inter-university-2025) | IUPC | Jun/20/2025 |
| 82 | [Divisible Perfection](https://codeforces.com/gym/105973/problem/F) | `Adhoc` | [Uttara University Inter-University Programming Contest](https://toph.co/c/uttara-university-inter-university-2025) | IUPC | Jun/20/2025 |
| 81 | [The Perfect Spider Web](https://codeforces.com/gym/105973/problem/E) | `Geometry`, `Ternary Search`, `Half Plane Intersection` | [Uttara University Inter-University Programming Contest](https://toph.co/c/uttara-university-inter-university-2025) | IUPC | Jun/20/2025 |
| 80 | [Symmetric Swap](https://codeforces.com/gym/105973/problem/D) | `Hashing`, `NTT` | [Uttara University Inter-University Programming Contest](https://toph.co/c/uttara-university-inter-university-2025) | IUPC | Jun/20/2025 |
| 79 | [Binomial XOR](https://codeforces.com/gym/105973/problem/C) | `Bits`, `Basic Combinatorics` | [Uttara University Inter-University Programming Contest](https://toph.co/c/uttara-university-inter-university-2025) | IUPC | Jun/20/2025 |
| 78 | [Red Dead Redemption 2](https://codeforces.com/gym/105973/problem/B) | `Graphs`, `DFS`, `Number Theory` | [Uttara University Inter-University Programming Contest](https://toph.co/c/uttara-university-inter-university-2025) | IUPC | Jun/20/2025 |
| 77 | [LCM Factorization](https://codeforces.com/gym/105884/problem/J) | `Number Theory`, `Combinatorics` | [Betopia Group Presents DUET Inter University Programming Contest](https://toph.co/c/duet-inter-university-iupc-2025) | IUPC | May/9/2025 |
| 76 | [XOR This OR That](https://codeforces.com/gym/105884/problem/I) | `Bits`, `Pigeonhole`, `Bitmasks` | [Betopia Group Presents DUET Inter University Programming Contest](https://toph.co/c/duet-inter-university-iupc-2025) | IUPC | May/9/2025 |
| 75 | [Distinct of Distincts](https://codeforces.com/gym/105884/problem/F) | `Constructive` | [Betopia Group Presents DUET Inter University Programming Contest](https://toph.co/c/duet-inter-university-iupc-2025) | IUPC | May/9/2025 |
| 74 | [An Interesting Problem](https://codeforces.com/gym/105884/problem/D) | `Strings`, `Adhoc` | [Betopia Group Presents DUET Inter University Programming Contest](https://toph.co/c/duet-inter-university-iupc-2025) | IUPC | May/9/2025 |
| 73 | [Triangle Trap](https://codeforces.com/gym/105884/problem/C) | `Geometry`, `Convex Hull` | [Betopia Group Presents DUET Inter University Programming Contest](https://toph.co/c/duet-inter-university-iupc-2025) | IUPC | May/9/2025 |
| 72 | [The Last Bit of Us](https://codeforces.com/gym/105884/problem/B) | `Trees`, `Greedy` | [Betopia Group Presents DUET Inter University Programming Contest](https://toph.co/c/duet-inter-university-iupc-2025) | IUPC | May/9/2025 |
| 71 | [The Art of Rearrangement](https://codeforces.com/gym/105723/problem/I) | `Adhoc` | [MTB Presents AUST Inter University Programming Contest](https://toph.co/c/mtb-presents-aust-inter-university-2025) | IUPC | Feb/21/2025 |
| 70 | [Aloy and the Forbidden Code](https://codeforces.com/gym/105723/problem/E) | `Giveaway` | [MTB Presents AUST Inter University Programming Contest](https://toph.co/c/mtb-presents-aust-inter-university-2025) | IUPC | Feb/21/2025 |
| 69 | [Flip to Zero](https://codeforces.com/gym/105723/problem/H) | `DP`, `BFS`, `Data Structures` | [MTB Presents AUST Inter University Programming Contest](https://toph.co/c/mtb-presents-aust-inter-university-2025) | IUPC | Feb/21/2025 |
| 68 | [GCD and LCM in Perfect Sync](https://codeforces.com/gym/105723/problem/G) | `Number Theory`, `Inclusion Exclusion` | [MTB Presents AUST Inter University Programming Contest](https://toph.co/c/mtb-presents-aust-inter-university-2025) | IUPC | Feb/21/2025 |
| 67 | [Palindromic Palindrome Partition](https://codeforces.com/gym/105723/problem/C) | `DP`, `Strings` | [MTB Presents AUST Inter University Programming Contest](https://toph.co/c/mtb-presents-aust-inter-university-2025) | IUPC | Feb/21/2025 |
| 66 | [The Absolute MEX Challenge](https://codeforces.com/gym/105723/problem/B) | `Constructive` | [MTB Presents AUST Inter University Programming Contest](https://toph.co/c/mtb-presents-aust-inter-university-2025) | IUPC | Feb/21/2025 |
| 65 | [MEX OR Mania](https://codeforces.com/contest/2049/problem/F) | `bitmasks`, `brute force`, `data structures`, `dsu`, `implementation`, `2700` | [Codeforces Round 994 (Div. 2)](https://codeforces.com/contest/2049) | CodeForces | Dec/20/2024 |
| 64 | [Yet Another Crossover Episode](https://github.com/baps-problemset-archive/icpc-2024-onsite/blob/main/problem_set.pdf) | `Bits`, `SOS`, `DP` | [ICPC ASIA DHAKA REGIONAL CONTEST 2024](https://bapsoj.org/contests/icpc-asia-dhaka-regional-contest-2024-onsite-round) | IUPC | Dec/7/2024 |
| 63 | [Shohag Loves Pebae](https://codeforces.com/contest/2039/problem/G) | `math`, `number theory`, `3500` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 62 | [Shohag Loves Counting (Hard Version)](https://codeforces.com/contest/2039/problem/F2) | `dp`, `number theory`, `3200` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 61 | [Shohag Loves Counting (Easy Version)](https://codeforces.com/contest/2039/problem/F1) | `combinatorics`, `dp`, `math`, `number theory`, `2800` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 60 | [Shohag Loves Inversions](https://codeforces.com/contest/2039/problem/E) | `combinatorics`, `dp`, `implementation`, `math`, `2200` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 59 | [Shohag Loves GCD](https://codeforces.com/contest/2039/problem/D) | `constructive algorithms`, `greedy`, `math`, `number theory`, `1700` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 58 | [Shohag Loves XOR (Hard Version)](https://codeforces.com/contest/2039/problem/C2) | `bitmasks`, `brute force`, `math`, `number theory`, `1800` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 57 | [Shohag Loves XOR (Easy Version)](https://codeforces.com/contest/2039/problem/C1) | `bitmasks`, `brute force`, `math`, `number theory`, `1200` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 56 | [Shohag Loves Strings](https://codeforces.com/contest/2039/problem/B) | `constructive algorithms`, `greedy`, `implementation`, `strings`, `1000` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 55 | [Shohag Loves Mod](https://codeforces.com/contest/2039/problem/A) | `constructive algorithms`, `number theory`, `800` | [CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)](https://codeforces.com/contest/2039) | CodeForces | Nov/23/2024 |
| 54 | [Adhoc King](https://bapsoj.org/contests/icpc-preliminary-dhaka-site-2024/problems/A) | `Adhoc`, `Constructive` | [ICPC PRELIMINARY DHAKA SITE 2024](https://bapsoj.org/contests/icpc-preliminary-dhaka-site-2024) | IUPC | Nov/9/2024 |
| 53 | [Non-decreasing Sequence](https://codeforces.com/contestInvitation/7f94142721ec4fda918f9c7f3e4bc12289d43dd1) | `dp` | [BCS Round 1 (Div. 3)](https://codeforces.com/contestInvitation/7f94142721ec4fda918f9c7f3e4bc12289d43dd1) | BCS | Jul/23/2022 |
| 52 | [Equal Digits](https://codeforces.com/contestInvitation/7f94142721ec4fda918f9c7f3e4bc12289d43dd1) | `greedy` | [BCS Round 1 (Div. 3)](https://codeforces.com/contestInvitation/7f94142721ec4fda918f9c7f3e4bc12289d43dd1) | BCS | Jul/23/2022 |
| 51 | [String Removal](https://codeforces.com/contestInvitation/7f94142721ec4fda918f9c7f3e4bc12289d43dd1) | `greedy` | [BCS Round 1 (Div. 3)](https://codeforces.com/contestInvitation/7f94142721ec4fda918f9c7f3e4bc12289d43dd1) | BCS | Jul/23/2022 |
| 50 | [XOR-Gun](https://toph.co/p/xor-gun) | `Bits` | [National Girls' Programming Contest 2021](https://toph.co/c/ngpc-2021) | Toph | Nov/26/2021 |
| 49 | [And... Yet Another AND Problem](https://toph.co/p/and-yet-another-and-problem) | `Bits` | [Ada Lovelace National Girls' Programming Contest 2021 - Preliminary](https://toph.co/c/ada-lovelace-national-girls-2021-preliminary) | Toph | Nov/19/2021 |
| 48 | [October 18, 2017](https://codeforces.com/contest/1603/problem/F) | `combinatorics`, `dp`, `math`, `2700` | [Codeforces Round #752 (Div. 1)](https://codeforces.com/contest/1603) | CodeForces | Oct/30/2021 |
| 47 | [A Perfect Problem](https://codeforces.com/contest/1603/problem/E) | `combinatorics`, `dp`, `math`, `3200` | [Codeforces Round #752 (Div. 1)](https://codeforces.com/contest/1603) | CodeForces | Oct/30/2021 |
| 46 | [Artistic Partition](https://codeforces.com/contest/1603/problem/D) | `divide and conquer`, `dp`, `implementation`, `number theory`, `3000` | [Codeforces Round #752 (Div. 1)](https://codeforces.com/contest/1603) | CodeForces | Oct/30/2021 |
| 45 | [Extreme Extension](https://codeforces.com/contest/1603/problem/C) | `dp`, `greedy`, `math`, `2300` | [Codeforces Round #752 (Div. 1)](https://codeforces.com/contest/1603) | CodeForces | Oct/30/2021 |
| 44 | [Moderate Modular Mode](https://codeforces.com/contest/1603/problem/B) | `constructive algorithms`, `math`, `number theory` `1600` | [Codeforces Round #752 (Div. 1)](https://codeforces.com/contest/1603) | CodeForces | Oct/30/2021 |
| 43 | [Di-visible Confusion](https://codeforces.com/contest/1603/problem/A) | `constructive algorithms`, `math`, `number theory` `1300` | [Codeforces Round #752 (Div. 1)](https://codeforces.com/contest/1603) | CodeForces | Oct/30/2021 |
| 42 | [XOR Specia-LIS-t](https://codeforces.com/contest/1604/problem/B) | `constructive algorithms`, `1100` | [Codeforces Round #752 (Div. 2)](https://codeforces.com/contest/1604) | CodeForces | Oct/30/2021 |
| 41 | [Era](https://codeforces.com/contest/1604/problem/A) | `greedy`, `800` | [Codeforces Round #752 (Div. 2)](https://codeforces.com/contest/1604) | CodeForces | Oct/30/2021 |
| 40 | [You](https://codeforces.com/contest/1554/problem/E) | `dfs and similar`, `dp`, `math`, `number theory`, `2600` | [Codeforces Round #735 (Div. 2)](https://codeforces.com/contest/1554) | CodeForces | Jul/29/2021 |
| 39 | [Diane](https://codeforces.com/contest/1554/problem/D) | `constructive algorithms`, `greedy`, `strings`, `1800` | [Codeforces Round #735 (Div. 2)](https://codeforces.com/contest/1554) | CodeForces | Jul/29/2021 |
| 38 | [Mikasa](https://codeforces.com/contest/1554/problem/C) | `bitmasks`, `greedy`, `1800` | [Codeforces Round #735 (Div. 2)](https://codeforces.com/contest/1554) | CodeForces | Jul/29/2021 |
| 37 | [Cobb](https://codeforces.com/contest/1554/problem/B) | `brute-force`, `greey`, `math`, `1700` | [Codeforces Round #735 (Div. 2)](https://codeforces.com/contest/1554) | CodeForces | Jul/29/2021 |
| 36 | [Cherry](https://codeforces.com/contest/1554/problem/A) | `greey`, `800` | [Codeforces Round #735 (Div. 2)](https://codeforces.com/contest/1554) | CodeForces | Jul/29/2021 |
| 35 | [F](https://toph.co/p/f) | `Data Structures` | [National High School Programming Contest 2021](https://toph.co/c/national-high-school-2021-senior) | Toph | Jun/11/2021 |
| 34 | [On the Sea](https://toph.co/p/median-of-the-submasks) | `Bitwise` | [Virtual Techfest 2020 Regional Programming Contest](https://toph.co/c/virtual-techfest-2020-regional) | Toph | Dec/04/2020 |
| 33 | [Giveaway](https://toph.co/p/giveaway) | `Strings` | [Virtual Techfest 2020 Regional Programming Contest](https://toph.co/c/virtual-techfest-2020-regional) | Toph | Dec/04/2020 |
| 32 | [Isn't It Strange?](https://toph.co/p/on-the-sea) | `Math` | [Virtual Techfest 2020 Regional Programming Contest](https://toph.co/c/virtual-techfest-2020-regional) | Toph | Dec/04/2020 |
| 31 | [You](https://toph.co/p/abcdefgh) | `Math` | [Virtual Techfest 2020 Regional Programming Contest](https://toph.co/c/virtual-techfest-2020-regional) | Toph | Dec/04/2020 |
| 30 | [Where Do Lovers Go?](https://toph.co/p/cherry-and-bitwise-and) | `Bitwise` | [Virtual Techfest 2020 Regional Programming Contest](https://toph.co/c/virtual-techfest-2020-regional) | Toph | Dec/04/2020 |
| 29 | [Panic! at the Disco](https://www.codechef.com/NOV20A/problems/PANIC) | `berlekamp-massey`, `cayley-hamilton`, `hard`, `math`, `matrix-exponentiation`, `nov20`, `number-theory`, `randomized`, `recurrence` | [November Challenge 2020 ](https://www.codechef.com/NOV20A) | CodeChef | Nov/6/2020 |
| 28 | [I Hate Symbo-LIS-m](https://www.codechef.com/COOK120A/problems/EXTREME) | `cook120`, `dynamic-programming`, `longest-inc-subsequence`, `medium`, `rajarshi_basu`, `sjshohag` | [July Cook-Off 2020](https://www.codechef.com/COOK120A) | CodeChef | Jul/19/2020 |
| 27 | [MEX-ception](https://www.codechef.com/COOK120A/problems/TOTEM) | `constructive`, `cook120`, `easy-medium`, `rajarshi_basu`, `sjshohag` | [July Cook-Off 2020](https://www.codechef.com/COOK120A) | CodeChef | Jul/19/2020 |
| 26 | [The In-XOR-able Task](https://www.codechef.com/COOK120A/problems/XORCIST) | `bitwise-operation`, `cook120`, `easy-medium`, `rajarshi_basu`, `sjshohag` | [July Cook-Off 2020](https://www.codechef.com/COOK120A) | CodeChef | Jul/19/2020 |
| 25 | [What Is This, a Crossover Episode](https://www.codechef.com/COOK120A/problems/BOJACK) | `constructive`, `cook120`, `easy-medium`, `rajarshi_basu`, `sjshohag` | [July Cook-Off 2020](https://www.codechef.com/COOK120A) | CodeChef | Jul/19/2020 |
| 24 | [Path-etic Products](https://www.codechef.com/COOK120A/problems/PATHETIC) | `bipartite`, `cook120`, `easy-medium`, `prime-factorization`, `trees`, `rajarshi_basu`, `sjshohag` | [July Cook-Off 2020](https://www.codechef.com/COOK120A) | CodeChef | Jul/19/2020 |
| 23 | [OR-thodox Distinction](https://www.codechef.com/problems/ORTHODOX) | `bitwise-operation`, `cook120`, `easy`, `rajarshi_basu`, `sjshohag` | [July Cook-Off 2020](https://www.codechef.com/COOK120A) | CodeChef | Jul/19/2020 |
| 22 | [Even-tual Reduction](https://www.codechef.com/COOK120A/problems/EVENTUAL) | `cakewalk`, `cook120`, `rajarshi_basu`, `sjshohag` | [July Cook-Off 2020](https://www.codechef.com/COOK120A) | CodeChef | Jul/19/2020 |
| 21 | [Weird Product](https://www.codechef.com/JULY20A/problems/WEIRDMUL) | `divide-and-conquer`, `july20`, `medium-hard`, `polynomial`, `sjshohag` | [July Challenge 2020](https://www.codechef.com/JULY20A) | CodeChef | Jul/03/2020 |
| 20 | [GCD of the Submasks ](https://www.codechef.com/LTIME84A/problems/GCDMASK) | `hard`, `lagrange-interpolation`, `ltime84`, `number-theory`, `sjshohag` | [May Lunchtime 2020](https://www.codechef.com/LTIME84A) | CodeChef | May/30/2020 |
| 19 | [Product of Minimums](https://www.codechef.com/problems/MINPROD) | `math` | Bending Spoons 2020 | CodeChef | Apr/6/2020 |
| 18 | [Inverse of a Function](https://www.codechef.com/PRACTICE/problems/INVXOR) | `combinatorics`, `discrete-logarithm`, `march20`, `medium-hard`, `sjshohag` | [March Challenge 2020](https://www.codechef.com/MARCH20A) | CodeChef | Mar/06/2020 |
| 17 | [Ppeerrffeecctt Ssqquuaarreess](https://www.codechef.com/PRACTICE/problems/PERFSQRS) | `cook123`, `medium-hard`, `mobius-function`, `number-theoretic-transfmtn`, `polynomial`, `psychik`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 16 | [Isomorphic Morphism](https://www.codechef.com/PRACTICE/problems/MORPH21) | `ad-hoc`, `cook123`, `medium`, `psychik`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 15 | [The In-XOR-able Task](https://www.codechef.com/PRACTICE/problems/XOXO) | `cook123`, `dynamic-programming`, `medium`, `psychik`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 14 | [An Inveractive Problem](https://www.codechef.com/PRACTICE/problems/INVERACT) | `binary-search`, `cook123`, `interactive`, `medium`, `psychik`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 13 | [Yet Another Crossover Episode](https://www.codechef.com/PRACTICE/problems/DIANE) | `ad-hoc`, `constructive`, `cook123`, `easy-medium`, `psychik`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 12 | [Path-etic Sums](https://www.codechef.com/PRACTICE/problems/PATHSUMS) | `ad-hoc`, `cook123`, `depth-first-search`, `easy`, `psychik`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 11 | [Decreasing Srrnmieeda](https://www.codechef.com/PRACTICE/problems/DECREM) | `cook123`, `easy`, `pigeonhole`, `psychik`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 10 | [Split the Str Ing](https://www.codechef.com/PRACTICE/problems/SPLITIT) | `ad-hoc`, `cook123`, `greedy`, `psychik`, `simple`, `sjshohag` | [October Cook-Off 2020](https://www.codechef.com/COOK123) | CodeChef | Oct/18/2020 |
| 9 | [The Selection](https://toph.co/p/the-selection) | `Graph` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 8 | [Subset AND](https://toph.co/p/subset-and) | `Greedy` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 7 | [Enormous Product](https://toph.co/p/enormous-product) | `Math` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 6 | [Ant-Man And The Polygon](https://toph.co/p/ant-man-and-the-polygon) | `Geometry` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 5 | [Playing On A Directed Graph](https://toph.co/p/playing-on-a-directed-graph) | `Graph`, `ShortestPath` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 4 | [Permutations and Divisors](https://toph.co/p/permutations-and-divisors) | `Greedy`, `Math` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 3 | [XOR Partition](https://toph.co/p/orxor) | `BinarySearch` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 2 | [String Is Not That Easy](https://toph.co/p/infinite-string) | `Greedy` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
| 1 | [Perfect Points](https://toph.co/p/perfect-points) | `NumberTheory` | [Contest Based on SUST Intra University Programming Contest 2019](https://toph.co/c/sust-intra-2019-r) | Toph | Dec/20/2019 |
## Additional Problems
### HackerRank
I have set 15-20 problems on HackerRank. Unfortunately they are private, so can't share the link here.