Competitive programming journal 2019

4 January

• Participated in Hello 2019. First 2 problems were easy, though the 2nd one couldn’t pass system tests just because size of one of the arrays was less than what it was expected, again dissappointed. Rank : 5617, 1340->1292.

5 January

• Participated in Codeforces Round #530 (Div. 2). First 2 problems were easy, upsolved 3rd problem, need to focus on constraints, it caused me many wrong submissions on 1st problem. Rank : 4017, 1292->1236.

8 January

• Solved BLOPER2 - Operators(new ver). Backtracking. Solution.
• Solved Odd-Even Subarrays. Nice problem, learnt a new cocept. Solution.
• Solved Beautiful Strings. Similar problem. Solution.
• Solved Number Sum. Solution.

12 January

• Solving Educational DP Contest Problems.
• Solved Frog 1. Solution.
• Solved Frog 2. Solution.
• Solved Vacation. Solution.
• Solved Knapsack 1. Solution.

15 January - 31 January

• Solved 1102A - Integer Sequence Dividing. Solution.
• Solved 1102B - Array K-Coloring. Solution.
• Solved 1105A - Salem and Sticks. Solution.
• Solved 1105B - Zuhair and Strings. Solution.
• Solved 1105C - Ayoub and Lost Array. Solution.
• Solved 1104A - Splitting into digits. Solution.
• Solved 1104B - Game with String. Solution.
• Solved 1104C - Grid Game. Solution.
• Solved 1108A - Two distinct points. Solution.
• Solved 1108B - Divisors of Two Integers. Solution.
• Solved 1108C - Nice Garland. Solution.
• Solved 1108D - Diverse Garland. Solution.
• Solved 1107A - Digits Sequence Dividing. Solution.
• Solved 1107B - Digital root. Solution.
• Solved 1107C - Brutality. Solution.
• Solved 677A - Vanya and Fence. Solution.

Contests Given in January

• Participated in Codeforces Round #534 (Div. 2). First 2 problems were easy, upsolved 3rd problem. Rank : 3881, 1236->1229.
• Participated in Educational Codeforces Round 59 (Rated for Div. 2). Rank : 2846, 1229->1242.

9 February

• Solved 1110A - Parity. Solution.
• Solved 1110B - Tape. Solution.
• Solved 280 - Vertex. Solution.
• Solved 1055 - Hashmat the Brave Warrior. Solution.
• Solved 10071 - Back to High School Physics. Solution.
• Solved 10773 - Back to Intermediate Math. Solution.
• Solved 11614 - Etruscan Warriors Never Play Chess. Solution.

10 February

• Solved 11934 - Magic Formula. Solution.
• Solved 10879 - Code Refactoring. Solution.
• Solved 10370 - Above Average. Solution.
• Solved 10346 - Peter’s Smokes. Solution.
• Solved 1225 - Digit Counting. Solution.
• Solved 11723 - Numbering Roads. Solution.
• Solved 11614 - Etruscan Warriors Never Play Chess. Solution.
• Solved 10773 - Back to Intermediate Math. Solution.
• Solved 493 - Rational Spiral. Solution.
• Solved 616 - Coconuts, Revisited. Solution.

11 February

• Solved 10025 - The ? 1 ? 2 ? … ? n = k problem. Solution.
• Solved 846 - Steps. Solution.
• Solved 10257 - Dick and Jane. Solution.
• Solved 10624 - Super Number. Solution.

13 February

• Solved 1114A - Got Any Grapes?. Solution.
• Solved 1114B - Yet Another Array Partitioning Task. Solution.

15 February

• Solved TDPRIMES - Printing some primes. Solution.
• Solved 1108E1 - Array and Segments (Easy version). Solution.
• Solved 1110C - Meaningless Operations. Solution.
• Solved 1103B - Game with modulo. Solution. First Div1 - B Problem I have solved!

16 February

• Solved 1101B - Accordion. Solution.
• Solved 1101C - Division and Union. Solution.

20 February

• I will be having my Mid Semester exams from 25th of this month, so I would not be able to do much of CP, but still if I solve some problems, I will update it here.
• Also I am leading a new project under Developer Students Club - IIT Patna named Notes Seperator, which is basically a Deep Learning project about which I will update in the ML section.

22 March

• Solved 1133A - Middle of the Contest. Solution.
• Solved 1133B - Preparation for International Women’s Day. Solution.
• Solved 1133C - Balanced Team. Solution.
• Solved 1133D - Zero Quantity Maximization. Solution.
• Solved 1141A - Game 23. Solution.

23 March

• Solved 1141B - Maximal Continuous Rest. Solution.
• Solved 1141C - Polycarp Restores Permutation. Solution.
• Solved 1141D - Colored Boots. Solution.

24 March

• Solved Chef and Number Game. Solution.
• Solved XOR N-bonacci Sequence. Solution.
• Solved UEFA Champions League. Solution.
• Participated in MARCH COOKOFF. Solved 2 Problems. Rank : 293. 1527 -> 1632.

28 March

• Solved Chef and a Beautiful Digit. Solution.

30 March

• Solved Testing Robot. Solution.
• • Solved Pogo Stick Competition. Solution.
• Participated in March Lunchtime 2019 Division 2. Solved 2 Problems. Rank: 613. 1632 -> 1658.

2 April

• Solved Even Substrings. Solution.
• Solved Choclates. Solution.

5 April

• Solved Saving The Universe Again. Solution.
• Solved Maximum Remaining. Solution.
• Solved Friend or Girlfriend. Solved a PnC problem after long time and a nice one too! Solution.
• Solved 1121A - Technogoblet of Fire. Solved a PnC problem after long time and a nice one too! Solution.
• Solved 1121B - Mike and Children. Solution.

6 April

• Solved Foregone Solution. Solution.
• Solved You Can Go Your Own Way. Solution.
• Solved Cryptopangrams. Solution.
• Participated in Google Code Jam’19. Qualified the first round with a rank of 10517.

8 April

• Solved Fencing. Solution.

10 April

• Solved 1145A - Thanos Sort. Solution.
• Solved Help Oz. Solution.
• Solved Gas Station. Solution.
• Solved Panda and Chain Reaction. Solution.
• Solved Tic Tac Toe. Solution.

17 April

• Solved 00168 - Theseus and the Minotaur. Solution.
• Solved 00280 - Vertex. Solution
• Solved Bishu and his Girlfriend. Solution.
• Solved Words And Trees. Solution.
• Solved Arya’s Stunt. Solution.

19 April

• Solved 1130A - Be Positive. Solution.
• Solved 1130B - Two Cakes. Solution.
• Solved 1130C - Connect. Solution.

13 May

• Participated in May Long Chanllenge. Solved 3 problems completely and 1 problem partially. Rank: 223. 1654 -> 1743.

17 May

• Solved 1136A - Nastya Is Reading a Book. Solution.
• Solved 1136B - Nastya Is Playing Computer Games. Solution.
• Solved 1136C - Nastya Is Transposing Matrices. Solution.

18 May

• Solved 1163A - Eating Soup. Solution.
• Solved 1163B - Cat Party. Solution.
• Solved 1163C - Power Transmission. Solution.

19 May

• Solved 1166A - Silent Classroom. Solution.
• Solved 1166B - All the Vowels Please. Solution.
• Solved 1166C - A Tale of Two Lands. Solution.

20 May

• Solved 701C - They Are Everywhere. Solution.
• Solved 492B - Vanya and Lanterns. Solution.
• Solved 10116 - Robot Motion. Solution.

21 May

• Solved 12376 - As Long as I Learn, I Live. Solution.
• Solved 12442 - Forwarding Emails. Solution.
• Solved 12582 - Wedding of Sultan. Solution.

22 May

• Solved 260 - Il Gioco dell’X. Solution.
• Solved 352 - The Seasonal War. Solution.
• Solved 459 - Graph Connectivity. Solution.
• Solved 657 - The die is cast. Solution.
• Solved 722 - Lakes. Solution.

24 May

• Solved 982A - Row. Solution.
• Solved 982B - Bus of Characters. Solution.
• Solved 982C - Cut ‘em all!. Solution.
• Solved 10946 - You want what filled?. Solution.

26 May

• Participated in Codeforces Round #562(Div.2). Was able to solve 1 Problem. Rank: 1810. 1242 -> 1299.

1 June

• Solved 10336 - Rank the Languages. Solution.
• Solved 11110 - Equidivisions. Solution.
• Solved 11244 - Counting Stars. Solution.
• Solved 11470 - Square Sums. Solution.
• Solved 11749 - Poor Trade Advisor. Solution.
• Solved 11953 - Battleships. Solution.

2 June

• Solved 10505 - Montesco vs Capuleto. Solution.
• Solved 10004 - Bicoloring. Solution.
• Solved 11396 - Claw Decomposition. Solution.
• Solved 11080 - Place the Guards. Solution.

3 June

• Solved 1165A - Remainder. Solution.
• Participated in Codeforces Round #563(Div.2). Was able to solve 3 Problem. Rank: 2280. 1299 -> 1339.

7 June

• Solved 1175A - From Hero to Zero. Solution.
• Solved 1167A - Telephone Number. Solution.
• Solved 1167B - News Distribution. Solution.
• Participated in Codeforces Round #564(Div.2). Was able to solve 2 Problem. Rank: 1826. 1339 -> 1377.

8 June

• Participated in June Long Challenge Div. 2.

11 June

• Solved 616C - Labyrinth. Solution.
• Participated in Codeforces Round #566(Div.2). Was able to solve 2 Problem. Rank: 2003. 1377 -> 1411.

20 June

• Explanation on Tarzan’s Algorithm, to find Articulation Points and Bridges.

25 June

• Solved 1180A - Alex and a Rhombus. Solution.
• Solved 1180B - Nick and Array. Solution.

27 June

• Solved 1180A - Valerity and Deque. Solution.
• Solved 1183A - Nearest Interesting Number. Solution.
• Solved 1183B - Equalize Prices. Solution.
• Solved 1183C - Computer Game. Solution.
• Solved 1183D - Candy Box (easy version). Solution.

28 June

• Solved 1183E - Subsequences (easy version). Solution.
• Solved 1167C - News Distribution. Solution.

29 June

• Solved Xsquare And Coin Collection. Solution.
• Solved MI vs CSK and Pearls. Solution.

2 July

• Solved 1183F - Topforces Strikes Back. Solution.

3 July

• Solved 1181A - Chunga-Changa. Solution.
• Solved 1181B - Split a Number. Solution.
• Solved Ping Paja Pong. Solution.
• Solved Magda and Silly Pairs. Solution.

4 July

• Solved 339D - Xenia and Bit Opertions. Solution.

15 July

• Participated in July Long Challenge - Div2. Solved 6 problems completely and 1 problem partially. Score: 610. Rank: 60. 1738 -> 1907.

16 July

• Solved LCS. Solution.
• Solved LongestPath. Solution.

17 July

• Solved 1185A - Ropewalkers. Solution.
• Solved Grid 1. Solution.