Problemset - Codeforces

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Before contest
Codeforces Round #680 (Div. 1, based on Moscow Team Olympiad)
44:58:32

Before contest
Codeforces Round #680 (Div. 2, based on Moscow Team Olympiad)
44:58:32

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Difficulty: —

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Problems

#	Name
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x6730
679A	Bear and Prime 100 constructive algorithms, interactive, math	1400	x7504
1167B	Lost Numbers brute force, divide and conquer, interactive, math	1400	x6402
727C	Guess the Array constructive algorithms, interactive, math	1400	x3429
1425F	Flamingoes of Mystery interactive	1400	x1950
1407C	Chocolate Bunny constructive algorithms, interactive, math, two pointers	1600	x7183
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x2524
1056C	Pick Heroes greedy, implementation, interactive, sortings	1700	x1796
1010B	Rocket binary search, interactive	1800	x3654
730B	Minimum and Maximum constructive algorithms, interactive	1800	x1842
1207E	XOR Guessing bitmasks, interactive, math	1900	x3804
1305D	Kuroni and the Celebration constructive algorithms, dfs and similar, interactive, trees	1900	x3511
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x3377
1063C	Dwarves, Hats and Extrasensory Abilities binary search, constructive algorithms, geometry, interactive	1900	x2070
952B	A Map of the Cat brute force, interactive	1900	x1606
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1414
1044B	Intersecting Subtrees dfs and similar, interactive, trees	1900	x1226
1103B	Game with modulo binary search, constructive algorithms, interactive	2000	x2475
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x1890
1033D	Divisors interactive, math, number theory	2000	x1613
843B	Interactive LowerBound brute force, interactive, probabilities	2000	x1549
896B	Ithea Plays With Chtholly binary search, constructive algorithms, games, greedy, interactive	2000	x1535
1019B	The hat binary search, interactive	2000	x1408
862D	Mahmoud and Ehab and the binary string binary search, divide and conquer, interactive	2000	x1295
870D	Something with XOR Queries brute force, interactive, probabilities	2000	x978
1363D	Guess The Maximums binary search, implementation, interactive, math	2100	x2953
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x2419
1039B	Subway Pursuit binary search, interactive, probabilities	2100	x1597
1023E	Down or Right constructive algorithms, interactive, matrices	2100	x1455
811D	Vladik and Favorite Game constructive algorithms, dfs and similar, graphs, interactive	2100	x1136
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x1897
713B	Searching Rectangles binary search, constructive algorithms, interactive	2200	x1205
809B	Glad to see you! binary search, interactive	2200	x1140
1153E	Serval and Snake binary search, brute force, interactive	2200	x1122
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1054
1155E	Guess the Root brute force, interactive, math	2200	x963
916D	Jamie and To-do List data structures, interactive, trees	2200	x291
1282D	Enchanted Artifact constructive algorithms, interactive, strings	2300	x1484
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x870
1370F1	The Hidden Pair (Easy Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2400	x915
1205C	Palindromic Paths implementation, interactive	2400	x860
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x820
1174F	Ehab and the Big Finale constructive algorithms, divide and conquer, graphs, implementation, interactive, trees	2400	x806
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x705
835E	The penguin's game binary search, constructive algorithms, interactive	2400	x688
710F	String Set Queries brute force, data structures, hashing, interactive, string suffix structures, strings	2400	x659
1061F	Lost Root interactive, probabilities	2400	x402
1080F	Katya and Segments Sets data structures, interactive, sortings	2400	x385
1403A	The Potion of Great Power *special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers	2400	x191
1100D	Dasha and Chess constructive algorithms, games, interactive	2500	x635
1089C	Cactus Search interactive	2500	x267
753C	Interactive Bulls and Cows (Hard) brute force, constructive algorithms, interactive	2500	x214
1375F	Integer Game constructive algorithms, games, interactive, math	2600	x1281
1406E	Deleting Numbers interactive, math, number theory	2600	x919
1368F	Lamps on a Circle games, implementation, interactive, math	2600	x578
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x485
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x449
1354G	Find a Gift binary search, interactive, probabilities	2600	x385
1081F	Tricky Interactor constructive algorithms, implementation, interactive	2600	x290
1090F	How to Learn You Score constructive algorithms, interactive	2600	x133
1370F2	The Hidden Pair (Hard Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2700	x809
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x625
1372F	Omkar and Modes binary search, divide and conquer, interactive	2700	x236
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x140
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x465
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x452
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2800	x361
750F	New Year and Finding Roots constructive algorithms, implementation, interactive, trees	2800	x331
1033E	Hidden Bipartite Graph binary search, constructive algorithms, dfs and similar, graphs, interactive	2800	x300
1291F	Coffee Varieties (easy version) graphs, interactive	2800	x201
1423M	Milutin's Plums interactive	2800	x67
1201E1	Knightmare (easy) graphs, interactive, shortest paths	2900	x71
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x278
1028G	Guess the number dp, interactive	3000	x269
1147E	Rainbow Coins interactive	3000	x200
1007C	Guess two numbers binary search, interactive	3000	x196
788D	Finding lines constructive algorithms, divide and conquer, interactive	3000	x164
1201E2	Knightmare (hard) graphs, interactive, shortest paths	3000	x81
1340E	Nastya and Bees graphs, interactive, probabilities	3000	x38
1129E	Legendary Tree binary search, interactive, trees	3100	x204
1336D	Yui and Mahjong Set constructive algorithms, interactive	3200	x321
1142E	Pink Floyd graphs, interactive	3200	x130
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x105
772E	Verifying Kingdom binary search, divide and conquer, interactive, trees	3200	x74
1179E	Alesya and Discrete Math divide and conquer, interactive	3200	x71
1299E	So Mean interactive, math	3400	x66
1158E	Strange device binary search, interactive, math, trees	3400	x58
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x113
1147F	Zigzag Game games, interactive	3500	x80
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x74
1428H	Rotary Laser Lock binary search, interactive	3500	x13