Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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Problems

#	Name
229D	Towers dp, greedy, two pointers	2100	x2096
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2103
894E	Ralph and Mushrooms dp, graphs	2100	x2135
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2141
1201D	Treasure Hunting binary search, dp, greedy, implementation	2100	x2145
1839D	Ball Sorting data structures, dp, sortings	2100	x2163
988F	Rain and Umbrellas dp	2100	x2186
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2228
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2230
840B	Leha and another game about graph constructive algorithms, data structures, dfs and similar, dp, graphs	2100	x2236
1799D2	Hot Start Up (hard version) data structures, dp	2100	x2250
1152D	Neko and Aki's Prank dp, greedy, trees	2100	x2252
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2258
1106E	Lunar New Year and Red Envelopes data structures, dp	2100	x2314
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2321
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2321
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2324
1650G	Counting Shortcuts data structures, dfs and similar, dp, graphs, shortest paths	2100	x2327
1216F	Wi-Fi data structures, dp, greedy	2100	x2327
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2332
1202C	You Are Given a WASD-string... brute force, data structures, dp, greedy, implementation, math, strings	2100	x2350
980D	Perfect Groups dp, math, number theory	2100	x2405
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2444
1767C	Count Binary Strings data structures, dp	2100	x2487
1223E	Paint the Tree dp, sortings, trees	2100	x2513
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2525
1154F	Shovels Shop dp, greedy, sortings	2100	x2536
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x2550
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2582
507E	Breaking Good dfs and similar, dp, graphs, shortest paths	2100	x2589
1863E	Speedrun brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers	2100	x2594
768E	Game of Stones bitmasks, dp, games	2100	x2626
1671E	Preorder combinatorics, divide and conquer, dp, dsu, hashing, sortings, trees	2100	x2636
960F	Pathwalks data structures, dp, graphs	2100	x2661
1913D	Array Collapse data structures, divide and conquer, dp, trees	2100	x2664
525E	Anya and Cubes binary search, bitmasks, brute force, dp, math, meet-in-the-middle	2100	x2721
1271D	Portals data structures, dp, greedy, implementation, sortings	2100	x2745
1029E	Tree with Small Distances dp, graphs, greedy	2100	x2765
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x2768
1884D	Counting Rhyme dp, math, number theory	2100	x2775
771C	Bear and Tree Jumps dfs and similar, dp, trees	2100	x2785
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2100	x2802
466D	Increase Sequence combinatorics, dp	2100	x2831
1077F2	Pictures with Kittens (hard version) data structures, dp	2100	x2853
1482E	Skyline Photo data structures, divide and conquer, dp	2100	x2926
1472F	New Year's Puzzle brute force, dp, graph matchings, greedy, sortings	2100	x2929
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x2966
1367F1	Flying Sort (Easy Version) dp, greedy, two pointers	2100	x2980
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3005
1151E	Number of Components combinatorics, data structures, dp, math	2100	x3022
936B	Sleepy Game dfs and similar, dp, games, graphs	2100	x3027
1354E	Graph Coloring dfs and similar, dp, graphs	2100	x3060
1271E	Common Number binary search, combinatorics, dp, math	2100	x3108
985E	Pencils and Boxes binary search, data structures, dp, greedy, two pointers	2100	x3227
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3294
1265E	Beautiful Mirrors data structures, dp, math, probabilities	2100	x3317
1606E	Arena combinatorics, dp, math	2100	x3322
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3382
1667B	Optimal Partition data structures, dp	2100	x3462
372C	Watching Fireworks is Fun data structures, dp, math	2100	x3619
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3643
734E	Anton and Tree dfs and similar, dp, trees	2100	x3732
1393D	Rarity and New Dress dfs and similar, dp, implementation, shortest paths	2100	x3765
486D	Valid Sets dfs and similar, dp, math, trees	2100	x3849
1479B2	Painting the Array II constructive algorithms, data structures, dp, greedy, implementation	2100	x3892
1366E	Two Arrays binary search, brute force, combinatorics, constructive algorithms, dp, two pointers	2100	x3950
1117D	Magic Gems dp, math, matrices	2100	x3999
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4074
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4186
1409F	Subsequences of Length Two dp, strings	2100	x4262
1472G	Moving to the Capital dfs and similar, dp, graphs, shortest paths	2100	x4389
1420C2	Pokémon Army (hard version) data structures, divide and conquer, dp, greedy, implementation	2100	x4487
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4619
319C	Kalila and Dimna in the Logging Industry dp, geometry	2100	x4707
837D	Round Subset dp, math	2100	x4777
796D	Police Stations constructive algorithms, dfs and similar, dp, graphs, shortest paths, trees	2100	x5112
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5115
1372D	Omkar and Circle brute force, dp, games, greedy	2100	x5284
1499D	The Number of Pairs dp, math, number theory	2100	x5435
1312E	Array Shrinking dp, greedy	2100	x5464
1433F	Zero Remainder Sum dp	2100	x5823
519E	A and B and Lecture Rooms binary search, data structures, dfs and similar, dp, trees	2100	x6159
1486D	Max Median binary search, data structures, dp	2100	x6665
1187E	Tree Painting dfs and similar, dp, trees	2100	x7386
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x175
774J	Stepan's Series *special problem, dp	2000	x352
228C	Fractal Detector dp, hashing	2000	x441
66E	Petya and Post data structures, dp	2000	x680
386C	Diverse Substrings dp, strings, two pointers	2000	x710
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x713
435D	Special Grid brute force, dp, greedy	2000	x744
413D	2048 bitmasks, dp	2000	x749
261C	Maxim and Matrix constructive algorithms, dp, math	2000	x759
374D	Inna and Sequence binary search, data structures, dp, trees	2000	x843
39E	What Has Dirichlet Got to Do with That? dp, games	2000	x852
119C	Education Reform dp	2000	x853
1057C	Tanya and Colored Candies *special problem, dp	2000	x858
251C	Number Transformation dp, greedy, number theory	2000	x1011
18E	Flag 2 dp	2000	x1014
18D	Seller Bob brute force, dp, greedy	2000	x1028