Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
761F	Dasha and Photos brute force, data structures, dp, implementation	2600	x411
761E	Dasha and Puzzle constructive algorithms, dfs and similar, graphs, greedy, trees	2000	x2139
761D	Dasha and Very Difficult Problem binary search, brute force, constructive algorithms, greedy, sortings	1700	x4052
761C	Dasha and Password brute force, dp, implementation	1500	x5874
761B	Dasha and friends brute force, implementation, math	1300	x6852
761A	Dasha and Stairs brute force, constructive algorithms, implementation, math	1000	x14490
760B	Frodo and pillows binary search, greedy	1500	x6553
760A	Petr and a calendar implementation, math	800	x8197
758F	Geometrical Progression brute force, math, number theory	2400	x629
758E	Broken Tree dfs and similar, dp, graphs, greedy, trees	2600	x491
758D	Ability To Convert constructive algorithms, dp, greedy, math, strings	2000	x2711
758C	Unfair Poll binary search, constructive algorithms, implementation, math	1700	x3872
758B	Blown Garland brute force, implementation, number theory	1100	x10200
758A	Holiday Of Equality implementation, math	800	x60709
757G	Can Bash Save the Day? data structures, divide and conquer, graphs, trees	3400	x503
757F	Team Rocket Rises Again data structures, graphs, shortest paths	2800	x1154
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1327
757D	Felicity's Big Secret Revealed bitmasks, dp	2200	x1400
757C	Felicity is Coming! data structures, hashing, sortings, strings	1900	x2342
757B	Bash's Big Day greedy, math, number theory	1400	x10232
757A	Gotta Catch Em' All! implementation	1000	x11250
756F	Long number expression parsing, math, number theory	3400	x93
756E	Byteland coins combinatorics, dp, math	3200	x172
756D	Bacterial Melee brute force, combinatorics, dp, string suffix structures	2400	x1001
756C	Nikita and stack data structures	2200	x1346
756B	Travel Card binary search, dp	1600	x3484
756A	Pavel and barbecue constructive algorithms, dfs and similar	1700	x3028
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x912
755F	PolandBall and Gifts bitmasks, dp, greedy	2600	x1383
755E	PolandBall and White-Red graph constructive algorithms, graphs, shortest paths	2400	x846
755D	PolandBall and Polygon data structures	2000	x2494
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x12383
755B	PolandBall and Game binary search, data structures, games, greedy, sortings, strings	1100	x11232
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x18013
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x497
754D	Fedor and coupons binary search, data structures, greedy, sortings	2100	x2460
754C	Vladik and chat brute force, constructive algorithms, dp, implementation, strings	2200	x936
754B	Ilya and tic-tac-toe game brute force, implementation	1100	x7246
754A	Lesha and array splitting constructive algorithms, greedy, implementation	1200	x8691
753C	Interactive Bulls and Cows (Hard) brute force, constructive algorithms, interactive	2500	x296
753B	Interactive Bulls and Cows (Easy) brute force, constructive algorithms, implementation	1600	x1199
753A	Santa Claus and Candies dp, greedy, math	1000	x9035
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x192
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x448
750F	New Year and Finding Roots constructive algorithms, implementation, interactive, trees	2800	x483
750E	New Year and Old Subsequence data structures, divide and conquer, dp, matrices	2600	x1578
750D	New Year and Fireworks brute force, data structures, dfs and similar, dp, implementation	1900	x3081
750C	New Year and Rating binary search, greedy, math	1600	x6558
750B	New Year and North Pole geometry, implementation	1300	x9475
750A	New Year and Hurry binary search, brute force, implementation, math	800	x75246
749E	Inversions After Shuffle data structures, probabilities	2400	x1056
749D	Leaving Auction binary search, data structures	2000	x2566
749C	Voting greedy, implementation, two pointers	1500	x5972
749B	Parallelogram is Back brute force, constructive algorithms, geometry	1200	x8491
749A	Bachgold Problem greedy, implementation, math, number theory	800	x49116
748F	Santa Clauses and a Soccer Championship constructive algorithms, dfs and similar, graphs, trees	2300	x646
748E	Santa Claus and Tangerines binary search, data structures, greedy, two pointers	2100	x1495
748D	Santa Claus and a Palindrome constructive algorithms, data structures, greedy	2100	x1864
748C	Santa Claus and Robot constructive algorithms, math	1400	x4613
748B	Santa Claus and Keyboard Check implementation, strings	1500	x5359
748A	Santa Claus and a Place in a Class implementation, math	800	x8968
747F	Igor and Interesting Numbers brute force, combinatorics, dp, math	2500	x419
747E	Comments dfs and similar, expression parsing, implementation, strings	1700	x1966
747D	Winter Is Coming dp, greedy, sortings	1800	x3250
747C	Servers implementation	1300	x4639
747B	Mammoth's Genome Decoding implementation, strings	900	x8849
747A	Display Size brute force, math	800	x10224
746G	New Roads constructive algorithms, graphs, trees	2100	x1519
746F	Music in Car data structures, greedy, two pointers	2200	x745
746E	Numbers Exchange greedy, implementation, math	1900	x1737
746D	Green and Black Tea constructive algorithms, greedy, math	1500	x5099
746C	Tram constructive algorithms, implementation, math	1600	x3712
746B	Decoding implementation, strings	900	x27832
746A	Compote implementation, math	800	x21363
745B	Hongcow Solves A Puzzle implementation	1400	x3741
745A	Hongcow Learns the Cyclic Shift implementation, strings	900	x10445
744E	Hongcow Masters the Cyclic Shift strings, two pointers	3200	x135
744D	Hongcow Draws a Circle geometry	3200	x120
744C	Hongcow Buys a Deck of Cards bitmasks, brute force, dp	2400	x1101
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1767
744A	Hongcow Builds A Nation dfs and similar, graphs	1500	x8357
743E	Vladik and cards binary search, bitmasks, brute force, dp	2200	x1499
743D	Chloe and pleasant prizes dfs and similar, dp, graphs, trees	1800	x4311
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x12275
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x14699
743A	Vladik and flights constructive algorithms, greedy, implementation	1200	x11050
742B	Arpa’s obvious problem and Mehrdad’s terrible solution brute force, math, number theory	1500	x9257
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x42396
741E	Arpa’s abnormal DNA and Mehrdad’s deep interest data structures, string suffix structures	3400	x178
741D	Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths data structures, dfs and similar, trees	2900	x2717
741C	Arpa’s overnight party and Mehrdad’s silent entering constructive algorithms, dfs and similar, graphs	2600	x2576
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5235
741A	Arpa's loud Owf and Mehrdad's evil plan dfs and similar, math	1600	x5428
740B	Alyona and flowers constructive algorithms	1200	x8284
740A	Alyona and copybooks brute force, implementation	1300	x8905
739E	Gosha is hunting brute force, data structures, dp, flows, math, probabilities, sortings	3000	x2174
739D	Recover a functional graph graph matchings	3400	x186
739C	Alyona and towers data structures	2500	x1512
739B	Alyona and a tree binary search, data structures, dfs and similar, graphs, trees	1900	x4596
739A	Alyona and mex constructive algorithms, greedy	1700	x7852