EXTRA EX-08
1900 ≤ Rating ≤ 1999 (Extra)
Extra problems for users satisfying this condition: 1900 <= Codeforces Rating <= 1999 (Extra).
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PROBLEMS 200
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| # | PROBLEM | RATING | DIFFICULTY | TAGS | STATUS |
|---|---|---|---|---|---|
| 01 | Rewards | LVL 1 | implementation | | |
| 02 | Kyoya and Photobooks | LVL 1 | brute forcemathstrings | | |
| 03 | Playing with Dice | LVL 1 | brute force | | |
| 04 | George and Accommodation | LVL 1 | implementation | | |
| 05 | Bear and Finding Criminals | LVL 2 | constructive algorithmsimplementation | | |
| 06 | Table | LVL 2 | constructive algorithmsgreedyimplementation | | |
| 07 | Lever | LVL 2 | implementationmath | | |
| 08 | Drazil and Date | LVL 2 | math | | |
| 09 | Exams | LVL 2 | implementationmath | | |
| 10 | Bear and Five Cards | LVL 2 | constructive algorithmsimplementation | | |
| 11 | Amr and Music | LVL 2 | greedyimplementationsortings | | |
| 12 | Initial Bet | LVL 2 | implementation | | |
| 13 | Game With Sticks | LVL 2 | implementation | | |
| 14 | Devu, the Singer and Churu, the Joker | LVL 2 | greedyimplementation | | |
| 15 | Joysticks | LVL 2 | dpgreedyimplementation +1 | | |
| 16 | Arrays | LVL 2 | sortings | | |
| 17 | Case of the Zeros and Ones | LVL 2 | greedy | | |
| 18 | Multiplication Table | LVL 2 | implementationnumber theory | | |
| 19 | Currency System in Geraldion | LVL 2 | implementationsortings | | |
| 20 | Domino Effect | LVL 3 | | | |
| 21 | Case of Fake Numbers | LVL 3 | brute forceimplementation | | |
| 22 | Sereja and Stairs | LVL 3 | greedyimplementationsortings | | |
| 23 | Bear and Poker | LVL 3 | implementationmathnumber theory | | |
| 24 | I.O.U. | LVL 3 | implementation | | |
| 25 | Nuts | LVL 3 | greedymath | | |
| 26 | The Wall | LVL 3 | math | | |
| 27 | Semifinals | LVL 3 | implementationsortings | | |
| 28 | Valuable Resources | LVL 3 | brute forcegreedy | | |
| 29 | Prizes, Prizes, more Prizes | LVL 3 | implementation | | |
| 30 | Fox and Number Game | LVL 3 | greedymath | | |
| 31 | Simple Game | LVL 3 | constructive algorithmsgamesgreedy +2 | | |
| 32 | Elections | LVL 3 | implementation | | |
| 33 | Strings of Power | LVL 3 | implementationstringstwo pointers | | |
| 34 | Permutation | LVL 3 | constructive algorithmsdpmath | | |
| 35 | Art Union | LVL 3 | brute forcedpimplementation | | |
| 36 | Diverse Permutation | LVL 3 | constructive algorithmsgreedy | | |
| 37 | MUH and Sticks | LVL 3 | implementation | | |
| 38 | Kyoya and Colored Balls | LVL 3 | combinatoricsdpmath | | |
| 39 | Mashmokh and Numbers | LVL 3 | constructive algorithmsnumber theory | | |
| 40 | Devu, the Dumb Guy | LVL 3 | implementationsortings | | |
| 41 | Random Teams | LVL 3 | combinatoricsconstructive algorithmsgreedy +1 | | |
| 42 | Chat Online | LVL 3 | implementation | | |
| 43 | Milking cows | LVL 3 | data structuresgreedy | | |
| 44 | Basketball Team | LVL 4 | combinatoricsdpmath +1 | | |
| 45 | Dynasty Puzzles | LVL 4 | dp | | |
| 46 | Case of Matryoshkas | LVL 4 | implementation | | |
| 47 | Report | LVL 4 | data structuressortings | | |
| 48 | Petya and Inequiations | LVL 4 | greedy | | |
| 49 | Guess Your Way Out! | LVL 4 | implementationmathtrees | | |
| 50 | Naughty Stone Piles | LVL 4 | greedy | | |
| 51 | Guest From the Past | LVL 4 | implementationmath | | |
| 52 | Animals | LVL 4 | dpgreedy | | |
| 53 | Replacement | LVL 4 | constructive algorithmsdata structuresimplementation | | |
| 54 | Inna and Sequence | LVL 4 | binary searchdata structuresdp +1 | | |
| 55 | Inna and Nine | LVL 4 | combinatoricsgreedy | | |
| 56 | Zuma | LVL 4 | dp | | |
| 57 | Rational Resistance | LVL 4 | mathnumber theory | | |
| 58 | Wilbur and Points | LVL 4 | combinatoricsgreedysortings | | |
| 59 | Pythagorean Triples | LVL 4 | mathnumber theory | | |
| 60 | Ivan and Powers of Two | LVL 4 | greedyimplementation | | |
| 61 | Sereja and Swaps | LVL 4 | brute forcesortings | | |
| 62 | Magic Formulas | LVL 4 | math | | |
| 63 | Two Heaps | LVL 4 | combinatoricsconstructive algorithmsgreedy +3 | | |
| 64 | Toy Sum | LVL 4 | greedyimplementationmath | | |
| 65 | Vasya and String | LVL 4 | binary searchdpstrings +1 | | |
| 66 | Bear and Three Musketeers | LVL 4 | brute forcedfs and similargraphs +1 | | |
| 67 | Jumping on Walls | LVL 4 | shortest paths | | |
| 68 | Guess a number! | LVL 4 | greedyimplementationtwo pointers | | |
| 69 | Divisible by Seven | LVL 4 | mathnumber theory | | |
| 70 | Planets | LVL 4 | binary searchdata structuresgraphs +1 | | |
| 71 | Secret Combination | LVL 4 | brute forceconstructive algorithmsimplementation | | |
| 72 | Tree Construction | LVL 4 | data structurestrees | | |
| 73 | Remainders Game | LVL 4 | chinese remainder theoremmathnumber theory | | |
| 74 | Amr and Pins | LVL 4 | geometrymath | | |
| 75 | Gerald is into Art | LVL 4 | constructive algorithmsimplementation | | |
| 76 | Kay and Snowflake | LVL 4 | data structuresdfs and similardp +1 | | |
| 77 | DZY Loves Chemistry | LVL 4 | dfs and similardsugreedy | | |
| 78 | The Child and Zoo | LVL 4 | dsusortings | | |
| 79 | Vasiliy's Multiset | LVL 4 | binary searchbitmasksdata structures +1 | | |
| 80 | Alyona and the Tree | LVL 4 | dfs and similardpgraphs +1 | | |
| 81 | Polo the Penguin and XOR operation | LVL 4 | implementationmath | | |
| 82 | Unusual Product | LVL 4 | implementationmath | | |
| 83 | Chips | LVL 4 | greedy | | |
| 84 | Two Substrings | LVL 4 | brute forcedpgreedy +2 | | |
| 85 | The Big Race | LVL 4 | math | | |
| 86 | Borya and Hanabi | LVL 4 | bitmasksbrute forceimplementation | | |
| 87 | Alice and Bob | LVL 4 | gamesmathnumber theory | | |
| 88 | Bits | LVL 4 | bitmasksconstructive algorithms | | |
| 89 | The Values You Can Make | LVL 4 | dp | | |
| 90 | Subsegments | LVL 4 | data structuresimplementation | | |
| 91 | Alternating Current | LVL 4 | data structuresgreedyimplementation | | |
| 92 | Ski Base | LVL 5 | combinatoricsdsugraphs | | |
| 93 | Mike and Geometry Problem | LVL 5 | combinatoricsdata structuresdp +2 | | |
| 94 | Police Station | LVL 5 | dpgraphsshortest paths | | |
| 95 | Maxim and Restaurant | LVL 5 | dpmathprobabilities | | |
| 96 | Xenia and Hamming | LVL 5 | implementationmath | | |
| 97 | The Road to Berland is Paved With Good Intentions | LVL 5 | 2-satdfs and similardsu +1 | | |
| 98 | Arthur and Table | LVL 5 | brute forcedata structuresdp +3 | | |
| 99 | Queue | LVL 5 | constructive algorithmsdp | | |
| 100 | Domino Principle | LVL 5 | binary searchdata structuressortings | | |
| 101 | Kleofáš and the n-thlon | LVL 5 | dpmathprobabilities | | |
| 102 | Little Elephant and Elections | LVL 5 | brute forcecombinatoricsdp | | |
| 103 | Wrong Floyd | LVL 5 | brute forceconstructive algorithmsdfs and similar +1 | | |
| 104 | Free Market | LVL 5 | dpgreedy | | |
| 105 | Strictly Positive Matrix | LVL 5 | graphsmath | | |
| 106 | Hydra | LVL 5 | graphssortings | | |
| 107 | Fox And Jumping | LVL 5 | bitmasksbrute forcedp +1 | | |
| 108 | Building Forest | LVL 5 | data structuresdsugraphs | | |
| 109 | Vika and Segments | LVL 5 | constructive algorithmsdata structuresgeometry +1 | | |
| 110 | Cipher | LVL 5 | combinatoricsdp | | |
| 111 | Famil Door and Brackets | LVL 5 | dpstrings | | |
| 112 | Theseus and labyrinth | LVL 5 | graphsimplementationshortest paths | | |
| 113 | 3-cycles | LVL 5 | constructive algorithmsgraphsgreedy | | |
| 114 | The table | LVL 5 | constructive algorithmsgreedy | | |
| 115 | Relay Race | LVL 5 | dp | | |
| 116 | Sereja and Periods | LVL 5 | binary searchdfs and similarstrings | | |
| 117 | Lucky Permutation | LVL 5 | brute forcecombinatoricsnumber theory | | |
| 118 | Ilya and Roads | LVL 5 | dp | | |
| 119 | Little Elephant and Furik and Rubik | LVL 5 | mathprobabilities | | |
| 120 | Running Track | LVL 5 | dpgreedystrings +1 | | |
| 121 | Minesweeper 1D | LVL 5 | dpimplementation | | |
| 122 | Wizards and Huge Prize | LVL 5 | dpmathprobabilities | | |
| 123 | Spongebob and Squares | LVL 5 | brute forcemath | | |
| 124 | Numbers | LVL 5 | combinatoricsdp | | |
| 125 | Shortest Path | LVL 5 | graphsshortest paths | | |
| 126 | Let's Play Osu! | LVL 5 | dpmathprobabilities | | |
| 127 | Triangles | LVL 5 | combinatoricsgraphsmath | | |
| 128 | Lieges of Legendre | LVL 5 | gamesmath | | |
| 129 | Number With The Given Amount Of Divisors | LVL 5 | brute forcedpnumber theory | | |
| 130 | Iahub and Permutations | LVL 5 | combinatoricsmath | | |
| 131 | Wet Shark and Blocks | LVL 5 | dpmatrices | | |
| 132 | Number Transformation | LVL 5 | dpgreedynumber theory | | |
| 133 | Invariance of Tree | LVL 5 | constructive algorithmsdfs and similargreedy +1 | | |
| 134 | Alyona and Strings | LVL 5 | dpstrings | | |
| 135 | Gifts by the List | LVL 5 | constructive algorithmsdfs and similargraphs +1 | | |
| 136 | Mushroom Gnomes - 2 | LVL 5 | binary searchdata structuresprobabilities +1 | | |
| 137 | Messenger | LVL 5 | data structureshashingimplementation +2 | | |
| 138 | Lengthening Sticks | LVL 5 | combinatoricsimplementationmath | | |
| 139 | Flawed Flow | LVL 5 | constructive algorithmsflowsgraphs +1 | | |
| 140 | Love Triangles | LVL 5 | dfs and similardsugraphs | | |
| 141 | Random Task | LVL 5 | binary searchbitmaskscombinatorics +2 | | |
| 142 | Modulo Sum | LVL 5 | combinatoricsdata structuresdp +1 | | |
| 143 | Inna and Binary Logic | LVL 5 | binary searchbitmasksdata structures | | |
| 144 | Little Elephant and LCM | LVL 5 | binary searchcombinatoricsdp +1 | | |
| 145 | Preparing for the Contest | LVL 5 | binary searchdata structuresgreedy +1 | | |
| 146 | Minimization | LVL 5 | dpgreedysortings | | |
| 147 | Two Strings | LVL 5 | data structuresdpstrings | | |
| 148 | Games with Rectangle | LVL 5 | combinatoricsdp | | |
| 149 | Interesting Game | LVL 5 | dpgamesmath | | |
| 150 | Persistent Bookcase | LVL 5 | bitmasksdata structuresdfs and similar +1 | | |
| 151 | Amr and Chemistry | LVL 5 | brute forcegraphsgreedy +2 | | |
| 152 | Apple Tree | LVL 5 | dfs and similarnumber theorytrees | | |
| 153 | Friends and Subsequences | LVL 5 | binary searchdata structures | | |
| 154 | Mishka and Interesting sum | LVL 5 | data structures | | |
| 155 | Time to Raid Cowavans | LVL 5 | brute forcedata structuressortings | | |
| 156 | Decoding Genome | LVL 5 | dpmatrices | | |
| 157 | Points on Plane | LVL 5 | constructive algorithmsdivide and conquergeometry +2 | | |
| 158 | Vitaly and Cycle | LVL 5 | combinatoricsdfs and similargraphs +1 | | |
| 159 | Babaei and Birthday Cake | LVL 5 | data structuresdp | | |
| 160 | Money Transfers | LVL 5 | constructive algorithmsdata structuresgreedy +1 | | |
| 161 | Compatible Numbers | LVL 5 | bitmasksbrute forcedfs and similar +1 | | |
| 162 | Infinite Inversions | LVL 6 | binary searchdata structuresimplementation +2 | | |
| 163 | Cactus | LVL 6 | data structuresdfs and similardp +2 | | |
| 164 | Yet Another Number Game | LVL 6 | dpgames | | |
| 165 | Vasily the Bear and Beautiful Strings | LVL 6 | combinatoricsmathnumber theory | | |
| 166 | Empire Strikes Back | LVL 6 | binary searchmathnumber theory | | |
| 167 | George and Cards | LVL 6 | binary searchdata structures | | |
| 168 | Game on Tree | LVL 6 | implementationmathprobabilities +1 | | |
| 169 | Graph Cutting | LVL 6 | dfs and similargraphs | | |
| 170 | Lovely Matrix | LVL 6 | dfs and similargraphsgreedy +1 | | |
| 171 | Beautiful Road | LVL 6 | dfs and similardpdsu +4 | | |
| 172 | Vanya and Treasure | LVL 6 | data structuresdpgraphs +1 | | |
| 173 | Famil Door and Roads | LVL 6 | combinatoricsdata structuresdfs and similar +3 | | |
| 174 | Acyclic Organic Compounds | LVL 6 | data structuresdfs and similardsu +3 | | |
| 175 | Thwarting Demonstrations | LVL 6 | binary searchdata structurestrees | | |
| 176 | Vanya and Brackets | LVL 6 | brute forcedpexpression parsing +3 | | |
| 177 | Game with Powers | LVL 6 | dpgames | | |
| 178 | Edges in MST | LVL 6 | dfs and similardsugraphs +1 | | |
| 179 | Anya and Cubes | LVL 6 | binary searchbitmasksbrute force +3 | | |
| 180 | The Last Fight Between Human and AI | LVL 6 | math | | |
| 181 | Arthur and Brackets | LVL 6 | dpgreedy | | |
| 182 | Trains and Statistic | LVL 6 | data structuresdpgreedy | | |
| 183 | Devu and Flowers | LVL 6 | bitmaskscombinatoricsnumber theory | | |
| 184 | Minimum Modular | LVL 7 | brute forcegraphsmath +1 | | |
| 185 | Anniversary | LVL 7 | data structuresimplementationmath +2 | | |
| 186 | Axis Walking | LVL 7 | bitmaskscombinatoricsconstructive algorithms +2 | | |
| 187 | Lucky Arrays | LVL 7 | data structures | | |
| 188 | Working routine | LVL 7 | data structuresimplementation | | |
| 189 | Linear Kingdom Races | LVL 7 | data structuresdp | | |
| 190 | Little Elephant and Tree | LVL 7 | data structuresdfs and similartrees | | |
| 191 | Lucky Array | LVL 7 | data structures | | |
| 192 | Alphabet Permutations | LVL 7 | data structuresstrings | | |
| 193 | Sereja and Sets | LVL 7 | bitmasksdfs and similar | | |
| 194 | President's Path | LVL 7 | dpgraphsshortest paths | | |
| 195 | Counter Attack | LVL 7 | data structuresdsugraphs +2 | | |
| 196 | Kefa and Watch | LVL 7 | data structureshashingstrings | | |
| 197 | Optimize! | LVL 8 | data structures | | |
| 198 | Choosing Subtree is Fun | LVL 8 | binary searchdata structuresdfs and similar +2 | | |
| 199 | Blood Cousins Return | LVL 8 | binary searchdata structuresdfs and similar +2 | | |
| 200 | Little Elephant and Strings | LVL 9 | data structuresimplementationstring suffix structures +1 | |
ANALYTICS
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≤ EXPERT
85
PROBLEMS CANDIDATE MASTER
50
PROBLEMS MASTER
35
PROBLEMS ≥ INTERNATIONAL MASTER
30
PROBLEMS