Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 3)
41:51:48
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1621H	Trains and Airplanes dfs and similar, graphs, shortest paths, trees	3500	x161
1434E	A Convex Game dsu, games	3500	x164
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x169
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x171
1817F	Entangled Substrings string suffix structures, strings	3500	x178
1423G	Growing flowers data structures	3500	x178
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x179
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x182
1753F	Minecraft Series brute force, two pointers	3500	x185
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x187
1804G	Flow Control data structures, dsu, implementation	3500	x193
1053E	Euler tour constructive algorithms, trees	3500	x194
1336F	Journey data structures, divide and conquer, graphs, trees	3500	x195
1835E	Old Mobile combinatorics, dp, probabilities	3500	x202
1178H	Stock Exchange binary search, flows, graphs	3500	x207
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x211
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x212
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x213
1439E	Cheat and Win bitmasks, data structures, games, trees	3500	x214
1043G	Speckled Band data structures, divide and conquer, hashing, string suffix structures, strings	3500	x215
1098F	Ж-function string suffix structures, strings	3500	x217
1368H2	Breadboard Capacity (hard version)	3500	x219
1086F	Forest Fires math	3500	x224
1830E	Bully Sort data structures, math	3500	x225
1083D	The Fair Nut's getting crazy data structures, implementation	3500	x226
1270I	Xor on Figures constructive algorithms, fft, math	3500	x227
1338E	JYPnation graphs	3500	x229
1450G	Communism bitmasks, dp, trees	3500	x233
1523H	Hopping Around the Array data structures, dp	3500	x234
1616G	Just Add an Edge dfs and similar, dp, graphs	3500	x236
1147F	Zigzag Game games, interactive	3500	x237
1148H	Holy Diver data structures	3500	x238
1458F	Range Diameter Sum data structures, trees	3500	x258
1588F	Jumping Through the Array binary search, data structures, graphs, two pointers	3500	x268
1456E	XOR-ranges dp, greedy	3500	x269
1464F	My Beautiful Madness data structures, trees	3500	x273
1110H	Modest Substrings dp, strings	3500	x274
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x285
1637H	Minimize Inversions Number data structures, greedy, math, sortings	3500	x300
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3500	x300
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x327
1500F	Cupboards Jumps dp	3500	x328
1290F	Making Shapes dp	3500	x352
1033G	Chip Game games	3500	x355
1267C	Cactus Revenge constructive algorithms	3500	x378
1158F	Density of subarrays dp, math	3500	x391
799F	Beautiful fountains rows data structures	3500	x418
1034D	Intervals of Intervals binary search, data structures, two pointers	3500	x431
1707E	Replace binary search, data structures	3500	x557
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3500	x835
1305G	Kuroni and Antihype bitmasks, brute force, dp, dsu, graphs	3500	x939
1431J	Zero-XOR Array *special problem, dp	3400	x42
1220G	Geolocation geometry	3400	x48
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x57
1580E	Railway Construction brute force, constructive algorithms, data structures, graphs, shortest paths	3400	x64
853E	Lada Malina data structures, geometry	3400	x64
1310F	Bad Cryptography math, number theory	3400	x67
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x77
1078E	Negative Time Summation constructive algorithms	3400	x86
1190F	Tokitsukaze and Powers number theory, probabilities	3400	x87
756F	Long number expression parsing, math, number theory	3400	x89
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3400	x92
1045F	Shady Lady geometry, math	3400	x92
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x94
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x99
1089H	Harder Satisfiability 2-sat, dfs and similar, graphs	3400	x105
1887F	Minimum Segments constructive algorithms	3400	x112
1023G	Pisces data structures, flows, trees	3400	x113
1552I	Organizing a Music Festival dfs and similar, math	3400	x121
1205F	Beauty of a Permutation constructive algorithms, math	3400	x121
917E	Upside Down data structures, string suffix structures, strings, trees	3400	x121
913H	Don't Exceed math, probabilities	3400	x123
1442F	Differentiating Games games, interactive	3400	x127
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x130
1060G	Balls and Pockets data structures	3400	x134
786D	Rap God data structures, dfs and similar, hashing, strings, trees	3400	x136
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x137
1530H	Turing's Award data structures, dp	3400	x140
1158E	Strange device binary search, interactive, math, trees	3400	x147
1787I	Treasure Hunt data structures, divide and conquer, two pointers	3400	x148
1299E	So Mean interactive, math	3400	x148
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x150
1012F	Passports dp, implementation	3400	x152
1852E	Rivalries constructive algorithms, data structures, greedy	3400	x157
1007E	Mini Metro dp	3400	x159
1764H	Doremy's Paint 2 data structures	3400	x165
1601F	Two Sorts binary search, dfs and similar, math, meet-in-the-middle	3400	x167
1784F	Minimums or Medians	3400	x169
741E	Arpa’s abnormal DNA and Mehrdad’s deep interest data structures, string suffix structures	3400	x174
739D	Recover a functional graph graph matchings	3400	x175
1242D	Number Discovery math	3400	x176
1466I	The Riddle of the Sphinx binary search, data structures, data structures, interactive	3400	x180
936E	Iqea data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees	3400	x182
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x184
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x195
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x200
1010F	Tree fft, graphs, trees	3400	x210
833E	Caramel Clouds data structures, dp, sortings	3400	x210
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x212
1103E	Radix sum fft, math, number theory	3400	x214