Problemset - Codeforces

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IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
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Problems

#	Name
1837D	Bracket Coloring constructive algorithms, greedy	1400	x15735
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x178
1835E	Old Mobile combinatorics, dp, probabilities	3500	x235
1835D	Doctor's Brown Hypothesis dfs and similar, graphs, math, number theory	2900	x542
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x1029
1835B	Lottery binary search, brute force, greedy, math, two pointers	2500	x969
1835A	k-th equality brute force, implementation, math	1700	x8037
1834F	Typewriter brute force, math	2500	x540
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2360
1834D	Survey in Class brute force, data structures, greedy, implementation, sortings	1900	x4846
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x5571
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x7795
1833E	Round Dance dfs and similar, dsu, graphs, shortest paths	1600	x12609
1833D	Flipper brute force, constructive algorithms, greedy	1400	x13679
1832F	Zombies binary search, dp	3200	x284
1832E	Combinatorics Problem brute force, combinatorics, dp	2200	x2243
1832D2	Red-Blue Operations (Hard Version) binary search, constructive algorithms, greedy, implementation, math	2400	x1972
1832D1	Red-Blue Operations (Easy Version) binary search, greedy, implementation, math	2100	x3027
1830F	The Third Grace data structures, dp	3200	x266
1830E	Bully Sort data structures, math	3500	x255
1830D	Mex Tree brute force, dp, trees	2800	x721
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1756
1830B	The BOSS Can Count Pairs brute force, math	2000	x5069
1830A	Copil Copac Draws Trees dfs and similar, dp, graphs, trees	1400	x14339
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x8110
1829G	Hits Different data structures, dp, implementation, math	1600	x11109
1827F	Copium Permutation constructive algorithms, data structures, greedy	3500	x119
1827E	Bus Routes binary search, constructive algorithms, dfs and similar, greedy, trees	3400	x435
1827D	Two Centroids data structures, dfs and similar, greedy, trees	2800	x782
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1270
1827B2	Range Sorting (Hard Version) binary search, data structures, dp, greedy	2400	x1944
1827B1	Range Sorting (Easy Version) binary search, dp, dsu, greedy, trees, two pointers	2000	x4002
1826F	Fading into Fog geometry, interactive, math, probabilities	2800	x404
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1681
1826D	Running Miles brute force, dp, greedy	1700	x10659
1824E	LuoTianyi and Cartridge data structures, trees	3500	x137
1824D	LuoTianyi and the Function data structures	3000	x511
1824C	LuoTianyi and XOR-Tree data structures, dfs and similar, dp, dsu, greedy, trees	2500	x1459
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2807
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4789
1824A	LuoTianyi and the Show greedy, implementation	1400	x11543
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x919
1823E	Removing Graph brute force, dp, games, graphs, math	2500	x1288
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3957
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2505
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x7333
1822F	Gardening Friends brute force, dfs and similar, dp, graphs, trees	1700	x6429
1822E	Making Anti-Palindromes greedy, math, strings	1600	x10851
1821F	Timber combinatorics, dp, fft, math	2600	x780
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2449
1821D	Black Cells binary search, brute force, greedy, math	1900	x5104
1819F	Willy-nilly, Crack, Into Release! data structures, dp	3500	x134
1819E	Roads in E City interactive, math, probabilities, trees	3200	x321
1819D	Misha and Apples brute force, data structures, dp, two pointers	2800	x686
1819C	The Fox and the Complete Tree Traversal constructive algorithms, dp, implementation, math, trees	2400	x1527
1819B	The Butcher geometry, greedy, implementation, sortings, two pointers	1900	x3688
1817F	Entangled Substrings string suffix structures, strings	3500	x217
1817E	Half-sum brute force, divide and conquer, greedy	3400	x276
1817D	Toy Machine constructive algorithms, games, implementation	2700	x882
1817C	Similar Polynomials combinatorics, math	2400	x1056
1817B	Fish Graph brute force, constructive algorithms, dfs and similar, graphs	1900	x4325
1817A	Almost Increasing Subsequence binary search, data structures, greedy	1500	x11482
1815F	OH NO1 (-2-3-4) constructive algorithms, graphs, math	3500	x241
1815E	Bosco and Particle dp, math, number theory, strings	3100	x353
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1221
1815C	Between constructive algorithms, dfs and similar, graphs, greedy	2200	x2043
1815B	Sum Graph brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees	2000	x3131
1814F	Communication Towers brute force, divide and conquer, dsu	2700	x664
1814E	Chain Chips data structures, dp, matrices	2300	x1415
1814D	Balancing Weapons binary search, brute force, data structures, math, two pointers	2500	x895
1814C	Search in Parallel constructive algorithms, greedy, sortings	1500	x11224
1814B	Long Legs brute force, math	1700	x10329
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1831
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x2150
1811F	Is It Flower? dfs and similar, graphs, implementation	2100	x1900
1811E	Living Sequence binary search, dp, math, number theory	1500	x12791
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7767
1810H	Last Number combinatorics, math	2900	x143
1810G	The Maximum Prefix dp	3200	x752
1810F	M-tree data structures, math, sortings, trees	2800	x587
1810E	Monsters brute force, data structures, dfs and similar, dsu, graphs, greedy	2100	x3323
1810D	Climbing the Tree binary search, math	1700	x7629
1809G	Prediction combinatorics, dp, math	2800	x460
1809F	Traveling in Berland binary search, data structures, graphs, greedy, implementation	2500	x794
1809E	Two Tanks binary search, dp, implementation, math	2400	x882
1809D	Binary String Sorting constructive algorithms, greedy	1800	x6497
1809C	Sum on Subarrays constructive algorithms, greedy, math	1500	x13279
1808E3	Minibuses on Venus (hard version) brute force, combinatorics, dp, math	2800	x456
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x712
1808E1	Minibuses on Venus (easy version) combinatorics, divide and conquer, dp	2200	x1389
1808D	Petya, Petya, Petr, and Palindromes binary search, brute force, data structures, two pointers	2100	x2422
1808C	Unlucky Numbers brute force, dp, greedy, implementation	1900	x3919
1807F	Bouncy Ball brute force, dfs and similar, implementation	1700	x6539
1806F2	GCD Master (hard version) greedy, math, sortings	2900	x331
1806F1	GCD Master (easy version) greedy, math, number theory, sortings	2900	x378
1806E	Tree Master brute force, data structures, dfs and similar, trees	2200	x2924
1806D	DSU Master combinatorics, dp, dsu, math	2500	x956
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7844
1805F2	Survival of the Weakest (hard version) greedy, math, sortings, two pointers	3100	x363
1805F1	Survival of the Weakest (easy version) binary search, brute force, implementation, math, sortings	2600	x981