Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
36:11:40
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
36:11:40
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

interactive

Add tag

Problems

#	Name
1840G2	In Search of Truth (Hard Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2500	x893
1491F	Magnets binary search, constructive algorithms, interactive	2700	x896
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x914
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x982
1858E2	Rollbacks (Hard Version) data structures, interactive, trees	2600	x998
1599H	Hidden Fortress interactive, math	2100	x1007
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x1109
1205C	Palindromic Paths implementation, interactive	2400	x1115
835E	The penguin's game binary search, constructive algorithms, interactive	2400	x1123
1839E	Decreasing Game constructive algorithms, dfs and similar, dp, greedy, interactive	2400	x1141
1738F	Connectivity Addicts constructive algorithms, dsu, graphs, greedy, interactive, shortest paths, trees	2400	x1145
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1160
1879E	Interactive Game with Coloring brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees	2400	x1179
870D	Something with XOR Queries brute force, interactive, probabilities	2000	x1193
1370F2	The Hidden Pair (Hard Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2700	x1233
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x1253
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x1260
1470C	Strange Shuffle binary search, brute force, constructive algorithms, interactive	2500	x1303
1746E1	Joking (Easy Version) binary search, constructive algorithms, interactive, ternary search	2500	x1338
1370F1	The Hidden Pair (Easy Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2400	x1355
1666I	Interactive Treasure Hunt brute force, constructive algorithms, geometry, interactive, math	2200	x1381
1155E	Guess the Root brute force, interactive, math	2200	x1389
713B	Searching Rectangles binary search, constructive algorithms, interactive	2200	x1419
1174F	Ehab and the Big Finale constructive algorithms, divide and conquer, graphs, implementation, interactive, trees	2400	x1434
809B	Glad to see you! binary search, interactive	2200	x1436
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1442
1153E	Serval and Snake binary search, brute force, interactive	2200	x1446
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x1458
811D	Vladik and Favorite Game constructive algorithms, dfs and similar, graphs, interactive	2100	x1524
1918E	ace5 and Task Order constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings	2200	x1529
1044B	Intersecting Subtrees dfs and similar, interactive, trees	1900	x1540
1406E	Deleting Numbers interactive, math, number theory	2600	x1541
862D	Mahmoud and Ehab and the binary string binary search, divide and conquer, interactive	2000	x1648
710F	String Set Queries brute force, data structures, hashing, interactive, string suffix structures, strings	2400	x1667
1779E	Anya's Simultaneous Exhibition constructive algorithms, graphs, greedy, interactive, sortings	2400	x1684
1617D2	Too Many Impostors (hard version) constructive algorithms, implementation, interactive, math	2400	x1704
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1706
1903E	Geo Game greedy, interactive, math	2000	x1778
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1836
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x1846
1019B	The hat binary search, interactive	2000	x1891
1375F	Integer Game constructive algorithms, games, interactive, math	2600	x1927
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x1940
1023E	Down or Right constructive algorithms, interactive, matrices	2100	x1950
952B	A Map of the Cat brute force, interactive	1900	x1990
896B	Ithea Plays With Chtholly binary search, constructive algorithms, games, greedy, interactive	2000	x2047
1282D	Enchanted Artifact constructive algorithms, interactive, strings	2300	x2057
1672E	notepad.exe binary search, constructive algorithms, greedy, interactive	2200	x2090
843B	Interactive LowerBound brute force, interactive, probabilities	2000	x2132
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2156
1840G1	In Search of Truth (Easy Version) constructive algorithms, interactive, math, meet-in-the-middle, probabilities	2200	x2212
1039B	Subway Pursuit binary search, interactive, probabilities	2100	x2275
1033D	Divisors interactive, math, number theory	2000	x2302
1056C	Pick Heroes greedy, implementation, interactive, sortings	1700	x2315
730B	Minimum and Maximum constructive algorithms, interactive	1800	x2375
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2628
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x2754
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2770
1063C	Dwarves, Hats and Extrasensory Abilities binary search, constructive algorithms, geometry, interactive	1900	x2787
1815B	Sum Graph brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees	2000	x2825
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2825
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x2857
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x2887
1867E2	Salyg1n and Array (hard version) constructive algorithms, interactive	2200	x2962
1856D	More Wrong divide and conquer, interactive	2100	x3062
1628C	Grid Xor constructive algorithms, greedy, implementation, interactive, math	2300	x3072
1624F	Interacdive Problem binary search, constructive algorithms, interactive	2000	x3165
1103B	Game with modulo binary search, constructive algorithms, interactive	2000	x3165
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3234
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3272
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3455
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3475
1867E1	Salyg1n and Array (simple version) constructive algorithms, interactive, math	2000	x3491
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3513
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3676
1363D	Guess The Maximums binary search, implementation, interactive, math	2100	x3822
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4182
1634D	Finding Zero constructive algorithms, interactive, math	2000	x4217
1697D	Guess The String binary search, constructive algorithms, interactive	1900	x4251
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4273
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x4360
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x4519
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4628
1305D	Kuroni and the Celebration constructive algorithms, dfs and similar, interactive, trees	1900	x4734
1010B	Rocket binary search, interactive	1800	x5064
1425F	Flamingoes of Mystery interactive	1400	x5187
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x5223
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5426
1207E	XOR Guessing bitmasks, interactive, math	1900	x5595
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x5753
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x5947
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6451
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6458
1729E	Guess the Cycle Size interactive, probabilities	1800	x6710
1621C	Hidden Permutations dfs and similar, interactive, math	1700	x6719
1503B	3-Coloring constructive algorithms, games, interactive	1700	x6831
727C	Guess the Array constructive algorithms, interactive, math	1400	x6881
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x7190
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7422
1486C2	Guessing the Greatest (hard version) binary search, interactive	1900	x8107