Problemset - Codeforces

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Codeforces Round (Div. 3)
4 days

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Problems

#	Name
1989F	Simultaneous Coloring dfs and similar, divide and conquer, graphs	3000	x196
1989E	Distance to Different combinatorics, dp, math	2300	x1233
1989D	Smithing Skill brute force, data structures, dp, greedy, math, sortings, two pointers	1900	x4169
1989C	Two Movies greedy, math	1400	x13269
1989B	Substring and Subsequence brute force, greedy, strings	1200	x15266
1989A	Catch the Coin implementation	800	x20950
1987H	Fumo Temple interactive	3500	x46
1987G2	Spinning Round (Hard Version) divide and conquer, dp, trees	3500	x62
1987G1	Spinning Round (Easy Version) divide and conquer, dp, trees	2900	x159
1987F2	Interesting Problem (Hard Version) dp	2600	x672
1987F1	Interesting Problem (Easy Version) dp	2500	x775
1987E	Wonderful Tree! brute force, data structures, dfs and similar, dsu, greedy, trees	2000	x2287
1987D	World is Mine dp, games	1800	x5122
1987C	Basil's Garden dp, greedy	1200	x13073
1987B	K-Sort greedy	1000	x15639
1987A	Upload More RAM greedy, math	800	x19662
1986G2	Permutation Problem (Hard Version) brute force, data structures, hashing, math, number theory	2500	x720
1986G1	Permutation Problem (Simple Version) binary search, brute force, combinatorics, data structures, math, number theory	2200	x1054
1986F	Non-academic Problem dfs and similar, graphs, trees	1900	x3206
1986E	Beautiful Array greedy, math, number theory, sortings	1700	x6586
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x12006
1986C	Update Queries data structures, greedy, sortings	1100	x19234
1986B	Matrix Stabilization brute force, data structures, greedy, sortings	1000	x22318
1986A	X Axis brute force, geometry, math, sortings	800	x33327
1985H2	Maximize the Largest Component (Hard Version) data structures, dfs and similar, dp, dsu, implementation	2200	x1154
1985H1	Maximize the Largest Component (Easy Version) brute force, data structures, dfs and similar, dsu, graphs, implementation	1700	x4303
1985G	D-Function combinatorics, math, number theory	1600	x7285
1985F	Final Boss binary search, data structures	1500	x12067
1985E	Secret Box brute force, combinatorics, math	1200	x16766
1985D	Manhattan Circle implementation, math	900	x29396
1985C	Good Prefixes greedy	1000	x26708
1985B	Maximum Multiple Sum brute force, math, number theory	800	x38379
1985A	Creating Words implementation, strings	800	x42754
1984H	Tower Capturing combinatorics, dp, geometry	3300	x132
1984G	Magic Trick II constructive algorithms, implementation, sortings	3200	x190
1984F	Reconstruction brute force, dp, math	2500	x747
1984E	Shuffle dp, greedy, trees	2400	x1139
1984D	''a'' String Problem brute force, hashing, implementation, math, string suffix structures, strings	2000	x2712
1984C2	Magnitude (Hard Version) combinatorics, dp, greedy, math	1700	x6177
1984C1	Magnitude (Easy Version) dp, greedy, math	1300	x13754
1984B	Large Addition implementation, math	1100	x15836
1984A	Strange Splitting constructive algorithms	800	x18786
1982F	Sorting Problem Again binary search, data structures, sortings	2600	x687
1982E	Number of k-good subarrays bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle	2300	x1177
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x5590
1982C	Boring Day binary search, data structures, dp, greedy, two pointers	1200	x13982
1982B	Collatz Conjecture brute force, implementation, math, number theory	1200	x14074
1982A	Soccer greedy, implementation, math, sortings	800	x21573
1981F	Turtle and Paths on a Tree data structures, dp, trees	3000	x195
1981E	Turtle and Intersected Segments data structures, dsu, graphs, greedy	2600	x639
1981D	Turtle and Multiplication constructive algorithms, dfs and similar, graphs, number theory	2400	x1279
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4343
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x11834
1981A	Turtle and Piggy Are Playing a Game brute force, greedy, math	800	x20008
1980G	Yasya and the Mysterious Tree bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees	2300	x959
1980F2	Field Division (hard version) math, sortings	2400	x801
1980F1	Field Division (easy version) data structures, math, sortings	1900	x3181
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x8809
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x12298
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x16307
1980B	Choosing Cubes sortings, sortings	800	x31330
1980A	Problem Generator math	800	x36277
1979F	Kostyanych's Theorem brute force, constructive algorithms, graphs, interactive	2900	x235
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1157
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5578
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x16428
1979B	XOR Sequences bitmasks, greedy	1000	x20236
1979A	Guess the Maximum brute force, greedy, implementation	800	x26402
1978F	Large Graph data structures, dfs and similar, dsu, graphs, number theory, two pointers	2400	x1025
1978E	Computing Machine brute force, data structures, dp, greedy, implementation	2000	x2956
1978D	Elections data structures, greedy, implementation, math	1600	x8994
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x12340
1978B	New Bakery binary search, greedy, math, ternary search	800	x19370
1978A	Alice and Books constructive algorithms, greedy, sortings	800	x22140
1977E	Tensor constructive algorithms, graphs, interactive	2600	x539
1977D	XORificator bitmasks, brute force, greedy, hashing	2300	x1543
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5801
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x15978
1977A	Little Nikita math	800	x27779
1976F	Remove Bridges data structures, dfs and similar, dp, greedy, sortings, trees	2800	x429
1976E	Splittable Permutations combinatorics, data structures, dfs and similar, greedy, math, trees	2500	x815
1976D	Invertible Bracket Sequences binary search, combinatorics, data structures, divide and conquer, implementation, two pointers	2000	x3488
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x8816
1976B	Increase/Decrease/Copy greedy, implementation	1100	x19846
1976A	Verify Password implementation, sortings, strings	800	x25508
1975I	Mind Bloom dp	3500	x59
1975H	378QAQ and Core greedy, strings	3500	x80
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x195
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x685
1975E	Chain Queries binary search, data structures, dfs and similar, implementation, trees	2100	x1927
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x5075
1975C	Chamo and Mocha's Array binary search, brute force, greedy	1200	x12739
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings	1000	x15702
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings	800	x17214
1974G	Money Buys Less Happiness Now data structures, greedy, sortings	2000	x3661
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x3113
1974E	Money Buys Happiness dp	1800	x6770
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x13047
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x14037
1974B	Symmetric Encoding implementation, sortings, strings	800	x28089

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