Problemset - Codeforces

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Codeforces Round #672 (Div. 2)
3 days

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Difficulty: —

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Problems

#	Name
1406E	Deleting Numbers interactive, math, number theory	2600	x803
1407C	Chocolate Bunny constructive algorithms, interactive, math, two pointers	1600	x6710
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x403
1403A	The Potion of Great Power *special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers	2400	x181
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x2342
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x131
1372F	Omkar and Modes binary search, divide and conquer, interactive	2700	x228
1375F	Integer Game constructive algorithms, games, interactive, math	2600	x1250
1370F2	The Hidden Pair (Hard Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2700	x793
1370F1	The Hidden Pair (Easy Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2400	x899
1368F	Lamps on a Circle games, implementation, interactive, math	2600	x569
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x606
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x442
1363D	Guess The Maximums binary search, implementation, interactive, math	2100	x2900
1354G	Find a Gift binary search, interactive, probabilities	2600	x375
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x473
1340E	Nastya and Bees graphs, interactive, probabilities	3000	x38
1336D	Yui and Mahjong Set constructive algorithms, interactive	3200	x309
1305D	Kuroni and the Celebration constructive algorithms, dfs and similar, interactive, trees	1900	x3462
1299E	So Mean interactive, math	3400	x64
1291F	Coffee Varieties (easy version) graphs, interactive	2800	x198
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x278
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x113
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2800	x358
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x814
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x3345
1282D	Enchanted Artifact constructive algorithms, interactive, strings	2300	x1466
1275F	Шардирование постов *special problem, binary search, interactive		x91
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x441
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x864
1207E	XOR Guessing bitmasks, interactive, math	1900	x3712
1205C	Palindromic Paths implementation, interactive	2400	x851
1201E2	Knightmare (hard) graphs, interactive, shortest paths	3000	x81
1201E1	Knightmare (easy) graphs, interactive, shortest paths	2900	x71
1179E	Alesya and Discrete Math divide and conquer, interactive	3200	x70
1174F	Ehab and the Big Finale constructive algorithms, divide and conquer, graphs, implementation, interactive, trees	2400	x792
1167B	Lost Numbers brute force, divide and conquer, interactive, math	1400	x6286
1158E	Strange device binary search, interactive, math, trees	3400	x57
1147F	Zigzag Game games, interactive	3500	x78
1147E	Rainbow Coins interactive	3000	x196
1155E	Guess the Root brute force, interactive, math	2200	x951
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x2504
1153E	Serval and Snake binary search, brute force, interactive	2200	x1112
1145G	AI Takeover interactive		x91
1142E	Pink Floyd graphs, interactive	3200	x128
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x691
1129E	Legendary Tree binary search, interactive, trees	3100	x194
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1033
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x1881
1103B	Game with modulo binary search, constructive algorithms, interactive	2000	x2436
1100D	Dasha and Chess constructive algorithms, games, interactive	2500	x629
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x103
1081F	Tricky Interactor constructive algorithms, implementation, interactive	2600	x288
1090F	How to Learn You Score constructive algorithms, interactive	2600	x127
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x1863
1089C	Cactus Search interactive	2500	x264
1056C	Pick Heroes greedy, implementation, interactive, sortings	1700	x1778
1080F	Katya and Segments Sets data structures, interactive, sortings	2400	x380
1061F	Lost Root interactive, probabilities	2400	x395
1044B	Intersecting Subtrees dfs and similar, interactive, trees	1900	x1210
1063C	Dwarves, Hats and Extrasensory Abilities binary search, constructive algorithms, geometry, interactive	1900	x2050
1033E	Hidden Bipartite Graph binary search, constructive algorithms, dfs and similar, graphs, interactive	2800	x297
1033D	Divisors interactive, math, number theory	2000	x1589
1039B	Subway Pursuit binary search, interactive, probabilities	2100	x1587
1028G	Guess the number dp, interactive	3000	x268
1023E	Down or Right constructive algorithms, interactive, matrices	2100	x1438
1019B	The hat binary search, interactive	2000	x1398
1010B	Rocket binary search, interactive	1800	x3614
1007C	Guess two numbers binary search, interactive	3000	x194
952B	A Map of the Cat brute force, interactive	1900	x1598
916D	Jamie and To-do List data structures, interactive, trees	2200	x288
896B	Ithea Plays With Chtholly binary search, constructive algorithms, games, greedy, interactive	2000	x1512
870D	Something with XOR Queries brute force, interactive, probabilities	2000	x963
862D	Mahmoud and Ehab and the binary string binary search, divide and conquer, interactive	2000	x1281
843B	Interactive LowerBound brute force, interactive, probabilities	2000	x1536
835E	The penguin's game binary search, constructive algorithms, interactive	2400	x684
811D	Vladik and Favorite Game constructive algorithms, dfs and similar, graphs, interactive	2100	x1131
809B	Glad to see you! binary search, interactive	2200	x1132
772E	Verifying Kingdom binary search, divide and conquer, interactive, trees	3200	x72
788D	Finding lines constructive algorithms, divide and conquer, interactive	3000	x159
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x6621
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x66
750F	New Year and Finding Roots constructive algorithms, implementation, interactive, trees	2800	x315
753C	Interactive Bulls and Cows (Hard) brute force, constructive algorithms, interactive	2500	x212
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1393
730B	Minimum and Maximum constructive algorithms, interactive	1800	x1808
727C	Guess the Array constructive algorithms, interactive, math	1400	x3349
713B	Searching Rectangles binary search, constructive algorithms, interactive	2200	x1197
710F	String Set Queries brute force, data structures, hashing, interactive, string suffix structures, strings	2400	x628
679A	Bear and Prime 100 constructive algorithms, interactive, math	1400	x7376