Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
45:04:01
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Problems

#	Name
1606E	Arena combinatorics, dp, math	2100	x3325
1265E	Beautiful Mirrors data structures, dp, math, probabilities	2100	x3317
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x3307
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3294
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3234
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3231
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3137
1790F	Timofey and Black-White Tree brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees	2100	x3136
1271E	Common Number binary search, combinatorics, dp, math	2100	x3110
1151E	Number of Components combinatorics, data structures, dp, math	2100	x3031
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3006
1204D2	Kirk and a Binary String (hard version) data structures, greedy, math, strings	2100	x2971
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x2929
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2100	x2803
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2790
1832D1	Red-Blue Operations (Easy Version) binary search, greedy, implementation, math	2100	x2783
1884D	Counting Rhyme dp, math, number theory	2100	x2782
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2774
525E	Anya and Cubes binary search, bitmasks, brute force, dp, math, meet-in-the-middle	2100	x2722
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2706
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2654
1551D2	Domino (hard version) constructive algorithms, implementation, math	2100	x2651
1863E	Speedrun brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers	2100	x2600
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2585
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2532
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2459
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2457
955C	Sad powers binary search, math, number theory	2100	x2454
980D	Perfect Groups dp, math, number theory	2100	x2407
1202C	You Are Given a WASD-string... brute force, data structures, dp, greedy, implementation, math, strings	2100	x2351
1710B	Rain binary search, brute force, data structures, geometry, greedy, implementation, math	2100	x2349
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2333
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2323
1761D	Carry Bit combinatorics, math	2100	x2318
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2263
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2256
985D	Sand Fortress binary search, constructive algorithms, math	2100	x2253
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2232
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2169
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2103
776E	The Holmes Children math, number theory	2100	x2098
571A	Lengthening Sticks combinatorics, implementation, math	2100	x2006
601B	Lipshitz Sequence data structures, math	2100	x2001
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x1961
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1948
1413E	Solo mid Oracle greedy, math, ternary search	2100	x1905
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1901
145C	Lucky Subsequence combinatorics, dp, math	2100	x1881
1027E	Inverse Coloring combinatorics, dp, math	2100	x1858
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1819
1510D	Digits dp, math, number theory	2100	x1794
549H	Degenerate Matrix binary search, math	2100	x1785
1252K	Addition Robot data structures, math, matrices	2100	x1781
1183F	Topforces Strikes Back brute force, math, sortings	2100	x1763
1267K	Key Storage combinatorics, math	2100	x1737
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1722
1158C	Permutation recovery constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings	2100	x1696
590B	Chip 'n Dale Rescue Rangers binary search, geometry, math	2100	x1693
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1656
992D	Nastya and a Game brute force, implementation, math	2100	x1583
5D	Follow Traffic Rules implementation, math	2100	x1519
837E	Vasya's Function binary search, implementation, math	2100	x1506
439E	Devu and Birthday Celebration combinatorics, dp, math	2100	x1474
1032E	The Unbearable Lightness of Weights dp, math	2100	x1472
1098B	Nice table brute force, constructive algorithms, greedy, math	2100	x1465
452C	Magic Trick combinatorics, math, probabilities	2100	x1395
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1384
266C	Below the Diagonal constructive algorithms, greedy, math	2100	x1334
818F	Level Generation binary search, math, ternary search	2100	x1284
895D	String Mark combinatorics, math, strings	2100	x1086
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1060
441D	Valera and Swaps constructive algorithms, dsu, graphs, implementation, math, string suffix structures	2100	x1059
1599H	Hidden Fortress interactive, math	2100	x1007
268E	Playlist math, probabilities, sortings	2100	x972
615E	Hexagons binary search, implementation, math	2100	x962
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x931
1912B	Blueprint for Seating combinatorics, divide and conquer, math	2100	x912
217B	Blackboard Fibonacci brute force, math	2100	x853
225E	Unsolvable math, number theory	2100	x777
1387A	Graph *special problem, binary search, dfs and similar, dp, math, ternary search	2100	x670
491B	New York Hotel greedy, math	2100	x535
802D	Marmots (easy) math	2100	x438
212C	Cowboys combinatorics, dp, math	2100	x376
209B	Pixels constructive algorithms, math	2100	x356
86D	Powerful array data structures, implementation, math, two pointers	2200	x12487
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6130
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4929
1092D1	Great Vova Wall (Version 1) greedy, implementation, math	2200	x4440
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4062
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x3906
1474D	Cleaning data structures, dp, greedy, math	2200	x3868
1110E	Magic Stones constructive algorithms, math, sortings	2200	x3803
903D	Almost Difference data structures, math	2200	x3691
1467D	Sum of Paths combinatorics, dp, math	2200	x3538
1428E	Carrots for Rabbits binary search, data structures, greedy, math, sortings	2200	x3498
1567E	Non-Decreasing Dilemma data structures, divide and conquer, math	2200	x3497
280C	Game on Tree implementation, math, probabilities, trees	2200	x3464
1406D	Three Sequences constructive algorithms, data structures, greedy, math	2200	x3363
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3351
1656E	Equal Tree Sums constructive algorithms, dfs and similar, math, trees	2200	x3278