Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 1004 (Div. 1)
03:40:39
Register now »

*has extra registration

Before contest
Codeforces Round 1004 (Div. 2)
03:40:39
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

interactive

Add tag

Problems

#	Name
1617D2	Too Many Impostors (hard version) constructive algorithms, implementation, interactive, math	2400	x1844
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x4815
1599H	Hidden Fortress interactive, math	2100	x1094
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2365
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3746
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x5482
1578M	The Mind constructive algorithms, interactive, probabilities	2700	x459
1578I	Interactive Rays geometry, interactive	3300	x63
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x133
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x411
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x723
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x7257
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x399
1546B	AquaMoon and Stolen String interactive, math	1200	x13294
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x564
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x2038
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7705
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2836
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x225
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x1984
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x6211
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x311
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4412
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x3090
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x12448
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x637
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x512
1505A	Is it rated - 2 *special problem, implementation, interactive	900	x14839
1503B	3-Coloring constructive algorithms, games, interactive	1700	x7130
1499G	Graph Coloring data structures, graphs, interactive	3100	x212
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1969
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x464
1491F	Magnets binary search, constructive algorithms, interactive	2700	x1032
1486C2	Guessing the Greatest (hard version) binary search, interactive	1900	x8829
1486C1	Guessing the Greatest (easy version) binary search, interactive	1600	x12799
1482G	Vabank binary search, interactive	3200	x307
1479A	Searching Local Minimum binary search, interactive, ternary search	1700	x12080
1470C	Strange Shuffle binary search, brute force, constructive algorithms, interactive	2500	x1368
1466I	The Riddle of the Sphinx binary search, data structures, data structures, interactive	3400	x205
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x3060
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4500
1444E	Finding the Vertex brute force, dfs and similar, dp, interactive, trees	3500	x146
1442F	Differentiating Games games, interactive	3400	x144
1438F	Olha and Igor interactive, probabilities, trees	3000	x667
1428H	Rotary Laser Lock binary search, interactive	3500	x112
1425F	Flamingoes of Mystery interactive	1400	x6191
1423M	Milutin's Plums interactive	2800	x248
1407C	Chocolate Bunny constructive algorithms, interactive, math, two pointers	1600	x12489
1406E	Deleting Numbers interactive, math, number theory	2600	x1747
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x1136
1403A	The Potion of Great Power *special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers	2400	x295
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3596
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x315
1375F	Integer Game constructive algorithms, games, interactive, math	2600	x2299
1372F	Omkar and Modes binary search, divide and conquer, interactive	2700	x458
1370F2	The Hidden Pair (Hard Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2700	x1522
1370F1	The Hidden Pair (Easy Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2400	x1650
1368F	Lamps on a Circle games, implementation, interactive, math	2600	x1063
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x1197
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x1456
1363D	Guess The Maximums binary search, implementation, interactive, math	2100	x4128
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x884
1354G	Find a Gift binary search, interactive, probabilities	2600	x810
1340E	Nastya and Bees graphs, interactive, probabilities	3000	x54
1336D	Yui and Mahjong Set constructive algorithms, interactive	3200	x490
1305D	Kuroni and the Celebration constructive algorithms, dfs and similar, interactive, trees	1900	x5097
1299E	So Mean interactive, math	3400	x175
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x378
1291F	Coffee Varieties (easy version) graphs, interactive	2800	x677
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x867
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2800	x686
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x1470
1282D	Enchanted Artifact constructive algorithms, interactive, strings	2300	x2269
1275F	Шардирование постов *special problem, binary search, interactive		x92
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x4716
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x928
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x1498
1207E	XOR Guessing bitmasks, interactive, math	1900	x6110
1205C	Palindromic Paths implementation, interactive	2400	x1197
1201E2	Knightmare (hard) graphs, interactive, shortest paths	3000	x150
1201E1	Knightmare (easy) graphs, interactive, shortest paths	2900	x133
1179E	Alesya and Discrete Math divide and conquer, interactive	3200	x183
1174F	Ehab and the Big Finale constructive algorithms, divide and conquer, graphs, implementation, interactive, trees	2400	x1770
1167B	Lost Numbers brute force, divide and conquer, interactive, math	1400	x12551
1158E	Strange device binary search, interactive, math, trees	3400	x155
1155E	Guess the Root brute force, interactive, math	2200	x1460
1153E	Serval and Snake binary search, brute force, interactive	2200	x1519
1147F	Zigzag Game games, interactive	3500	x268
1147E	Rainbow Coins interactive	3000	x347
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3764
1145G	AI Takeover interactive		x177
1142E	Pink Floyd graphs, interactive	3200	x529
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x1727
1129E	Legendary Tree binary search, interactive, trees	3100	x469
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1549
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2924
1103B	Game with modulo binary search, constructive algorithms, interactive	2000	x3305
1100D	Dasha and Chess constructive algorithms, games, interactive	2500	x882
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x214
1090F	How to Learn You Score constructive algorithms, interactive	2600	x333