LET'S CRUSH THEM
C LEVEL PROBLEMS
ID Problem Name Difficulty Level
1 Given Length and Sum of Digits... 1
2 Number of Ways 4
3 Team 4
4 Exams 4
5 Boredom 4
6 Table Decorations 4
7 Beautiful Sets of Points 4
8 k-Tree 4
9 Valera and Tubes 4
10 Palindrome Transformation 4
11 Fixing Typos 4
12 Hacking Cypher 2
13 Gargari and Bishops 5
14 Pocket Book 4
15 Lucky Sum of Digits 3
16 Arithmetic Progression 4
17 Fox and Box Accumulation 3
18 Hexadecimal's Numbers 2
19 Xenia and Weights 4
20 Bombs 4
21 Pashmak and Buses 5
22 Little Elephant and Problem 4
23 Maze 4
24 Ice Skating 3
25 Hamburgers 4
26 Bear and Prime Numbers 5
27 History 4
28 Checkposts 4
29 Mashmokh and Numbers 3
30 Ladder 4
31 Escape from Stones 3
32 Division into Teams 4
33 Barcode 4
34 Stripe 3
35 Mafia 4
36 Cows and Sequence 4
37 To Add or Not to Add 4
38 Xor-tree 3
39 LCM Challenge 4
40 Rational Resistance 4
41 Points on Line 3
42 No to Palindromes! 4
43 Magic Formulas 4
44 Beautiful Numbers 4
45 Quiz 4
46 Replacement 3
47 Vasya and Robot 4
48 Captain Marmot 4
49 Win or Freeze 4
50 Matrix 4
51 Little Frog 2
52 Lucky Sum 3
53 Fight the Monster 4
54 Triangle 4
55 View Angle 4
56 King's Path 4
57 Round Table Knights 4
58 Purification 4
59 Maxim and Discounts 3
60 The Closest Pair 3
61 Divisible by Seven 4
62 Hometask 4
63 Little Elephant and Interval 4
64 Dorm Water Supply 3
65 Shaass and Lights 5
66 Prime Number 5
67 The Brand New Function 4
68 About Bacteria 4
69 Malek Dance Club 4
70 Dima and Containers 5
71 Trains 4
72 Almost Arithmetical Progression 4
73 Newspaper Headline 4
74 Inna and Dima 4
75 Hiring Staff 5
76 STL 4
77 Prime Permutation 4
78 Four Segments 5
79 Fire Again 4
80 Below the Diagonal 6
81 Mail Stamps 4
82 Grammar Lessons 4
83 Bracket Sequence 4
84 Heroes 4
85 Literature Lesson 4
86 Reducing Fractions 5
87 Game 4
88 Cutting Figure 4
89 Trees 4
90 Hockey 4
91 Schedule 4
92 Rectangle Puzzle 5
93 Disposition 4
94 Flea 4
95 Help Victoria the Wise 4
96 Corporation Mail 4
97 Optimal Sum 5
98 On Number of Decompositions into Multipliers 7
99 Blocked Points 7
100 Crossword 5
ID Problem Name Difficulty Level
D LEVEL PROBLEMS
ID Problem Name Online Judge Difficulty Level
1 Flowers Codeforces 1
2 Prizes, Prizes, more Prizes Codeforces 3
3 Xenia and Bit Operations Codeforces 4
4 Vasya and Chess Codeforces 4
5 Mashmokh and ACM Codeforces 3
6 Multiplication Table Codeforces 5
7 Unbearable Controversy of Being Codeforces 3
8 Caesar's Legions Codeforces 4
9 Colorful Graph Codeforces 4
10 Little Girl and Maximum XOR Codeforces 4
11 Common Divisors Codeforces 4
12 Magic Box Codeforces 4
13 Good Sequences Codeforces 4
14 Password Codeforces 4
15 Greg and Graph Codeforces 4
16 Working out Codeforces 4
17 Count Good Substrings Codeforces 5
18 Good Substrings Codeforces 5
19 Long Path Codeforces 4
20 Maximum Value Codeforces 5
21 Greenhouse Effect Codeforces 4
22 Red-Green Towers Codeforces 5
23 Maximum Submatrix 2 Codeforces 4
24 Cow Program Codeforces 4
25 Biridian Forest Codeforces 4
26 Andrey and Problem Codeforces 4
27 DZY Loves Modification Codeforces 5
28 Zero Tree Codeforces 4
29 Prefixes and Suffixes Codeforces 5
30 Queue Codeforces 4
31 Chips Codeforces 4
32 Valid Sets Codeforces 5
33 Pair of Numbers Codeforces 5
34 Planets Codeforces 4
35 Queue Codeforces 5
36 Petya and Divisors Codeforces 4
37 Obsessive String Codeforces 5
38 Dima and Bacteria Codeforces 5
39 Psychos in a Line Codeforces 4
40 Ciel and Duel Codeforces 5
41 Falling Anvils Codeforces 4
42 Hit Ball Codeforces 4
43 Toy Sum Codeforces 4
44 Lucky Common Subsequence Codeforces 5
45 Two Paths Codeforces 5
46 Help General Codeforces 4
47 Dima and Two Sequences Codeforces 4
48 How many trees? Codeforces 5
49 Lucky Number 2 Codeforces 5
50 Cinema Codeforces 6
51 Wizards and Huge Prize Codeforces 5
52 Apple Tree Codeforces 5
53 Yaroslav and Time Codeforces 5
54 Numbers Codeforces 5
55 Treasure Island Codeforces 4
56 Book of Evil Codeforces 5
57 Sereja and Periods Codeforces 5
58 Infinite Maze Codeforces 5
59 Playing with Permutations Codeforces 5
60 Doctor Codeforces 4
61 Animals Codeforces 4
62 Mushroom Scientists Codeforces 4
63 Tennis Game Codeforces 4
64 Buses Codeforces 4
65 String Codeforces 5
66 Shifting Codeforces 5
67 Boring Partition Codeforces 4
68 Analyzing Polyline Codeforces 5
69 Vasya and Types Codeforces 4
70 Lizards and Basements 2 Codeforces 6
71 Constellation Codeforces 5
72 Pawn Codeforces 5
73 Journey Codeforces 5
74 Tanya and Password Codeforces 7
75 Demonstration Codeforces 4
76 Big Maximum Sum Codeforces 5
77 The Child and Zoo Codeforces 4
78 Mr. Bender and Square Codeforces 4
79 Special Grid Codeforces 5
80 Name That Tune Codeforces 6
81 Ring Road 2 Codeforces 5
82 Russian Roulette Codeforces 5
83 Snake Codeforces 6
84 Upgrading Array Codeforces 5
85 Edges in MST Codeforces 6
86 Fools and Foolproof Roads Codeforces 6
87 End of Exams Codeforces 5
88 Restoring Numbers Codeforces 7
89 Cats Transport Codeforces 7
90 Broken Monitor Codeforces 5
91 The Minimum Number of Variables Codeforces 6
92 Volcanoes Codeforces 7
93 Widget Library Codeforces 5
94 Misha and Permutations Summation Codeforces 4
95 BerDonalds Codeforces 7
96 Tower of Hanoi Codeforces 8
97 Mr. Kitayuta's Technology Codeforces 5
98 Shoe Store Codeforces 7
99 Inna and Sweet Matrix Codeforces 8
100 Help King Codeforces 9
ID Problem Name Difficulty Level
B LEVEL PROBLEMS
ID Problem Name Online Judge Difficulty Level
1 Queue at the School 1
2 Xenia and Ringroad 2
3 Fedor and New Game 3
4 Random Teams 3
5 Vanya and Lanterns 3
6 Sort the Array 4
7 Lecture 2
8 T-primes 3
9 Anton and currency you all know 3
10 DZY Loves Strings 2
11 Amr and Pins 4
12 Little Pony and Sort by Shift 4
13 Jzzhu and Sequences 4
14 Roadside Trees (Simplified Edition) 2
15 Find Marble 3
16 Suffix Structures 4
17 Little Elephant and Magic Square 2
18 OR in Matrix 4
19 Football Kit 3
20 Little Girl and Game 3
21 Petya and Staircases 3
22 Books 4
23 Chat Online 3
24 Painting Pebbles 2
25 Vasya and Wrestling 4
26 George and Round 3
27 The Fibonacci Segment 3
28 Trace 2
29 Sale 2
30 Road Construction 3
31 Little Pigs and Wolves 3
32 Before an Exam 1
33 Painting Eggs 4
34 Lucky Substring 2
35 Combination 3
36 Jeff and Periods 3
37 Unary 3
38 Polo the Penguin and Matrix 4
39 Dima and To-do List 3
40 Coins 3
41 Han Solo and Lazer Gun 4
42 Garland 3
43 Flag Day 4
44 Art Union 3
45 Lucky String 2
46 Petya and Countryside 2
47 Archer 3
48 Routine Problem 4
49 Color the Fence 4
50 Levko and Permutation 3
51 Vasya's Calendar 1
52 Reading 3
53 Phone Numbers 3
54 Permutation 3
55 Students and Shoelaces 3
56 Help Kingdom of Far Far Away 2 3
57 The Child and Set 4
58 Non-square Equation 4
59 Special Offer! Super Price 999 Bourles! 4
60 Little Elephant and Sorting 4
61 Walking in the Rain 3
62 Two Tables 4
63 Xenia and Spies 4
64 Lucky Numbers (easy) 4
65 Ping-Pong (Easy Version) 4
66 After Training 3
67 Magic, Wizardry and Wonders 4
68 Limit 4
69 Ancient Prophesy 4
70 Hometask 4
71 Well-known Numbers 4
72 Settlers' Training 3
73 Nearest Fraction 4
74 Counting Rhombi 3
75 Friends 3
76 Undoubtedly Lucky Numbers 4
77 Forming Teams 4
78 Inna and Nine 4
79 Bets 3
80 Young Photographer 4
81 Martian Clock 4
82 Jury Size 4
83 Hard Work 4
84 Testing Pants for Sadness 3
85 Running Student 4
86 Tournament 3
87 Magical Array 3
88 Help Chef Gerasim 4
89 Convex Shape 4
90 Surrounded 5
91 Spoilt Permutation 4
92 PFAST Inc. 4
93 Martian Dollar 4
94 Bargaining Table 5
95 Sysadmin Bob 4
96 Facetook Priority Wall 4
97 Maximal Area Quadrilateral 4
98 Traffic Lights 4
99 Blog Photo 5
100 Three matrices 7
ID Problem Name Difficulty Level