Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
2109C3	Hacking Numbers (Hard Version) constructive algorithms, interactive, math, number theory	2600	x3231
2109C2	Hacking Numbers (Medium Version) constructive algorithms, interactive, math, number theory	1700	x8707
2109C1	Hacking Numbers (Easy Version) bitmasks, constructive algorithms, interactive, math, number theory	1500	x11502
2109B	Slice to Survive bitmasks, greedy, math	1200	x17414
2109A	It's Time To Duel implementation	800	x27006
2108F	Fallen Towers binary search, greedy	2900	x550
2108E	Spruce Dispute constructive algorithms, dfs and similar, graphs, greedy, implementation, shortest paths, trees	2600	x895
2108D	Needle in a Numstack binary search, brute force, implementation, interactive	2200	x2425
2108C	Neo's Escape binary search, brute force, data structures, dp, dsu, graphs, greedy, implementation	1500	x14790
2108B	SUMdamental Decomposition bitmasks, constructive algorithms, greedy, implementation, math	1300	x14611
2108A	Permutation Warm-Up combinatorics, greedy, math	800	x22188
2107F2	Cycling (Hard Version) binary search, brute force, data structures, dp, greedy	2800	x512
2107F1	Cycling (Easy Version) binary search, brute force, dp, greedy	2300	x1834
2107E	Ain and Apple Tree binary search, constructive algorithms, greedy, math, trees	2600	x943
2107D	Apple Tree Traversing brute force, dfs and similar, greedy, implementation, trees	2100	x3566
2107C	Maximum Subarray Sum binary search, constructive algorithms, dp, implementation, math	1500	x12162
2107B	Apples in Boxes games, greedy, math	1100	x19884
2107A	LRC and VIP greedy, number theory	800	x22249
2106G2	Baudelaire (hard version) binary search, dfs and similar, divide and conquer, implementation, interactive, trees	2500	x616
2106G1	Baudelaire (easy version) binary search, constructive algorithms, divide and conquer, greedy, interactive, trees	2200	x1623
2106F	Goblin dfs and similar, dp, dsu, greedy, math	1900	x4452
2106E	Wolf binary search, greedy, math	1800	x5962
2106D	Flower Boy binary search, dp, greedy, two pointers	1500	x12349
2106C	Cherry Bomb greedy, math, sortings	1000	x25724
2106B	St. Chroma constructive algorithms, greedy, math	900	x28481
2106A	Dr. TC brute force, math	800	x36485
2104G	Modulo 3 data structures, divide and conquer, dsu, graphs, trees	2700	x538
2104F	Numbers and Strings binary search, brute force, dfs and similar, dp, implementation, math	2600	x728
2104E	Unpleasant Strings binary search, dp, greedy, strings	1700	x8141
2104D	Array and GCD binary search, greedy, math, number theory	1400	x13308
2104C	Card Game brute force, constructive algorithms, games, greedy, math	1100	x17469
2104B	Move to the End brute force, data structures, dp, greedy, implementation	1000	x20873
2104A	Three Decks math	800	x26371
2103F	Maximize Nor bitmasks, data structures, dp, implementation, sortings	2600	x623
2103E	Keep the Sum constructive algorithms, implementation, two pointers	2600	x607
2103D	Local Construction constructive algorithms, dfs and similar, implementation, two pointers	2000	x3997
2103C	Median Splits binary search, greedy, implementation, sortings	1600	x10635
2103B	Binary Typewriter greedy, math	1100	x17775
2103A	Common Multiple brute force, greedy, implementation, math	800	x25001
2102B	The Picky Cat implementation, sortings	900	x19913
2102A	Dinner Time constructive algorithms, math	900	x21565
2101F	Shoo Shatters the Sunshine combinatorics, dp, trees	3300	x160
2101E	Kia Bakes a Cake data structures, dp, greedy, trees	3100	x537
2101D	Mani and Segments data structures, implementation, sortings, two pointers	2500	x1288
2101C	23 Kingdom binary search, brute force, data structures, greedy, ternary search, two pointers	2200	x2576
2101B	Quartet Swapping brute force, data structures, divide and conquer, greedy, sortings	1800	x7089
2101A	Mex in the Grid constructive algorithms, implementation	1300	x13709
2098B	Sasha and the Apartment Purchase math, sortings	1400	x7946
2098A	Vadim's Collection brute force, greedy	800	x14795
2097F	Lost Luggage dp, flows	3500	x185
2097E	Clearing the Snowdrift data structures, dfs and similar, dp, greedy	3100	x280
2097D	Homework bitmasks, math, matrices	2800	x555
2097C	Bermuda Triangle chinese remainder theorem, geometry, implementation, math, number theory	2400	x1028
2097B	Baggage Claim combinatorics, dfs and similar, dp, dsu, graphs, implementation, math, trees	2300	x1944
2097A	Sports Betting 2-sat, brute force, math, sortings	1400	x8653
2096H	Wonderful XOR Problem bitmasks, combinatorics, dp, fft, math	3200	x226
2096G	Wonderful Guessing Game bitmasks, constructive algorithms, interactive	3200	x424
2096F	Wonderful Impostors data structures, implementation, two pointers	3100	x467
2096E	Wonderful Teddy Bears greedy, implementation, sortings	2400	x2055
2096D	Wonderful Lightbulbs combinatorics, constructive algorithms, math	2000	x5633
2096C	Wonderful City dp, implementation	1700	x8271
2096B	Wonderful Gloves greedy, math, sortings	1100	x16639
2096A	Wonderful Sticks constructive algorithms, greedy	800	x20640
2095J	Premiere at a Wrong Time *special problem		x543
2095I	Mysterious Script *special problem, expression parsing, number theory		x640
2095H	Blurry Vision *special problem, fft, math		x842
2095G	Definitely a Geometry Problem *special problem, geometry		x963
2095F	⅓ оf а Рrоblеm *special problem, math		x838
2095E	Pair Count *special problem, number theory		x787
2095D	Where Am I? *special problem, geometry		x5307
2095C	Would It Be Unrated? *special problem, binary search, brute force		x3749
2095B	Plinko *special problem, games, interactive		x6008
2095A	Piecing It Together *special problem, string suffix structures		x13828
2094H	La Vaca Saturno Saturnita binary search, brute force, math, number theory	1900	x3805
2094G	Chimpanzini Bananini data structures, implementation, math	1700	x7905
2094F	Trulimero Trulicina constructive algorithms	1600	x11495
2094E	Boneca Ambalabu bitmasks	1200	x18647
2094D	Tung Tung Sahur greedy, strings, two pointers	1100	x24003
2094C	Brr Brrr Patapim math	900	x30646
2094B	Bobritto Bandito brute force, constructive algorithms	800	x33280
2094A	Trippi Troppi strings	800	x56652
2093G	Shorten the Array binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers	1900	x3836
2093F	Hackers and Neural Networks bitmasks, brute force, greedy	1800	x5905
2093E	Min Max MEX binary search, brute force, greedy	1500	x13526
2093D	Skibidi Table bitmasks, implementation	1400	x12331
2093C	Simple Repetition math, number theory	1000	x30989
2093B	Expensive Number greedy, math	900	x30954
2093A	Ideal Generator math	800	x40951
2092F	Andryusha and CCB brute force, constructive algorithms, greedy, math, number theory, strings	2900	x432
2092E	She knows... combinatorics, constructive algorithms, graphs, math	2100	x3862
2092D	Mishkin Energizer brute force, constructive algorithms, greedy, implementation, strings	1800	x6905
2092C	Asuna and the Mosquitoes constructive algorithms, greedy, math	1200	x22695
2092B	Lady Bug brute force, constructive algorithms, implementation, math	1000	x24959
2092A	Kamilka and the Sheep greedy, math, number theory, sortings	800	x28391
2091G	Gleb and Boating brute force, constructive algorithms, data structures, dp, graphs, greedy, math, number theory, shortest paths	2300	x1531
2091F	Igor and Mountain binary search, brute force, dp	1800	x6185
2091E	Interesting Ratio brute force, math, number theory, two pointers	1300	x19709
2091D	Place of the Olympiad binary search, greedy, math	1200	x23583
2091C	Combination Lock constructive algorithms, greedy	1000	x28972
2091B	Team Training dp, greedy, sortings	800	x32814

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