| Problem Name | Online Judge | Contest | Difficulty Level | |
|---|---|---|---|---|
| 1 | Tetrahedron | Codeforces | Codeforces Round #113 (Div. 2) | 1 |
| 2 | Modular Fibonacci | UVA | 1 | |
| 3 | Counting Rabbits | SPOJ | 1 | |
| 4 | Recursive Sequence | SPOJ | 1 | |
| 5 | Mixtures | SPOJ | 1 | |
| 6 | Fibonacci Sum | SPOJ | 1 | |
| 7 | The Knights Of The Round Table | UVA | 1 | |
| 8 | Jzzhu and Sequences | Codeforces | Codeforces Round #257 (Div. 2) | 1 |
| 9 | Recursive Sequence (Version II) | SPOJ | 2 | |
| 10 | Yet another Number Sequence | UVA | 2 | |
| 11 | Euclids algorithm revisited | SPOJ | 2 | |
| 12 | Decode the Strings | SPOJ | 2 | |
| 13 | Mr. Kitayuta's Gift | Codeforces | Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) | 2 |
| 14 | Flibonakki | SPOJ | 2 | |
| 15 | Summing Sums | SPOJ | 2 | |
| 16 | Factory | Codeforces | Codeforces Round #276 (Div. 2) | 2 |
| 17 | End of Fun | SPOJ | 3 | |
| 18 | Quiz | Codeforces | Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) | 3 |
| 19 | Text Generator | SPOJ | 3 | |
| 20 | Teobaldo's Trip | UVA | 3 | |
| 21 | Sum of Tetranacci numbers | SPOJ | 3 | |
| 22 | Ant | SPOJ | 3 | |
| 23 | Recurrences | UVA | 3 | |
| 24 | How Many Calls? | UVA | 3 | |
| 25 | Barcode | Codeforces | Codeforces Round #139 (Div. 2) | 3 |
| 26 | Number of quite different words | SPOJ | 3 | |
| 27 | Contemplation! Algebra | UVA | 3 | |
| 28 | Plane Hopping | SPOJ | 3 | |
| 29 | Tribonacci | UVA | 3 | |
| 30 | Recurrence | SPOJ | 3 | |
| 31 | Plant | Codeforces | Codeforces Round #118 (Div. 1) & Codeforces Round #118 (Div. 2) | 3 |
| 32 | Fibonacci vs Polynomial | SPOJ | 4 | |
| 33 | Number of Paths in the Empire | SGU | 4 | |
| 34 | Iterated Linear Function | Codeforces | Educational Codeforces Round 13 | 4 |
| 35 | Power of Matrix | UVA | 4 | |
| 36 | R Numbers | SPOJ | 4 | |
| 37 | Once Again... | Codeforces | Codeforces Round #323 (Div. 1) & Codeforces Round #323 (Div. 2) | 4 |
| 38 | Experienced Endeavour | UVA | 5 | |
| 39 | Fantastic Sequence | UVA | 5 | |
| 40 | K-based Numbers. Version 3 | Timus | 5 | |
| 41 | Wet Shark and Blocks | Codeforces | Codeforces Round #341 (Div. 2) | 5 |
| 42 | Life Game | SPOJ | 5 | |
| 43 | Jumbo Airlines | SPOJ | 5 | |
| 44 | Stocks Prediction | SPOJ | 5 | |
| 45 | Finding Paths in Grid | UVA | 5 | |
| 46 | Four colors | SPOJ | 5 | |
| 47 | Life, the Universe, and Everything II | SPOJ | 5 | |
| 48 | Okabe and El Psy Kongroo | Codeforces | Codeforces Round #420 (Div. 2) | 6 |
| 49 | Text Generater II | SPOJ | 6 | |
| 50 | Gremlins | SPOJ | 6 | |
| 51 | Decoding Genome | Codeforces | Codeforces Round #137 (Div. 2) | 6 |
| 52 | GukiZ and Binary Operations | Codeforces | Codeforces Round #307 (Div. 2) | 6 |
| 53 | How many Knight Placing? | UVA | 6 | |
| 54 | Krypton Number System | UVA | 6 | |
| 55 | Pibonacci | SPOJ | 7 | |
| 56 | Axel and Marston in Bitland | Codeforces | ?????????? 2017 - ????? (?????? ??? ??????-??????????) | 7 |
| 57 | Darth Vader and Tree | Codeforces | Codeforces Round #291 (Div. 2) | 7 |
| 58 | Dexterina’s Lab | Codeforces | Bubble Cup 9 - Finals [Online Mirror] | 7 |
| 59 | Smile House | Codeforces | Codeforces Testing Round #4 | 8 |
| 60 | Flights for Regular Customers | Codeforces | Codeforces Round #319 (Div. 1) | 8 |
| 61 | Anniversary | Codeforces | Codeforces Round #140 (Div. 1) & Codeforces Round #140 (Div. 2) | 8 |
| 62 | Ignore the Blocks | UVA | 8 | |
| 63 | Hamming Distance | Codeforces | Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) | 8 |
| 64 | Bear in the Field | Codeforces | Codeforces Round #226 (Div. 2) | 8 |
| 65 | Jeff and Brackets | Codeforces | Codeforces Round #204 (Div. 1) & Codeforces Round #204 (Div. 2) | 8 |
| 66 | Turtles | Codeforces | Codeforces Round #202 (Div. 1) | 8 |
| 67 | Design Tutorial: Change the Goal | Codeforces | Codeforces Round #270 | 9 |
| 68 | Little Pony and Elements of Harmony | Codeforces | Codeforces Round #259 (Div. 1) | 9 |
| 69 | Museum | Codeforces | Codeforces Beta Round #86 (Div. 1 Only) | 9 |
| 70 | Fibonotci | Codeforces | Bubble Cup 8 - Finals [Online Mirror] | 9 |
| 71 | Permutations | Codeforces | Codeforces Round #382 (Div. 1) | 9 |
| 72 | Crime Management | Codeforces | Codeforces Beta Round #83 (Div. 1 Only) | 9 |
| 73 | Vasya and Shifts | Codeforces | Codeforces Round #425 (Div. 2) | 9 |
| 74 | Fibonacci Number | Codeforces | Codeforces Round #122 (Div. 1) | 9 |
| 75 | Flags | Codeforces | Codeforces Beta Round #76 (Div. 1 Only) | 9 |
| 76 | Gambling Nim | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 9 |
| 77 | Yet Another Number Sequence | Codeforces | Codeforces Round #230 (Div. 1) & Codeforces Round #230 (Div. 2) | 9 |
| 78 | Stairs and Lines | Codeforces | Codeforces Round #284 (Div. 1) | 9 |
| 79 | Mushroom Gnomes | Codeforces | Codeforces Beta Round #56 | 9 |
| 80 | Strange Calculation and Cats | Codeforces | Codeforces Round #329 (Div. 2) | 9 |
| 81 | Wizards and Bets | Codeforces | Codeforces Round #114 (Div. 1) | 9 |
| 82 | Pentagon | Codeforces | Codeforces Beta Round #48 | 9 |
| 83 | Mirror Box | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] | 10 |
| 84 | Berland Traffic | Codeforces | Codeforces Testing Round #5 | 10 |
| 85 | DZY Loves Bridges | Codeforces | Codeforces Round #255 (Div. 1) | 10 |
| 86 | DZY Loves Games | Codeforces | Codeforces Round #255 (Div. 1) | 10 |
| 87 | Fibonacci Strings | Codeforces | ABBYY Cup 2.0 - Easy | 10 |
| 88 | Long sequence | Codeforces | Yandex.Algorithm 2011 Round 2 | 10 |
| 89 | Combining Slimes | Codeforces | Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) | 10 |
| 90 | Subsequences Return | Codeforces | Codeforces Round #283 (Div. 1) | 10 |