Problemset - Codeforces

→ Pay attention

Before contest
Educational Codeforces Round 131 (Rated for Div. 2)
3 days

→ Filter Problems

Difficulty: —

interactive

Add tag

Problems

#	Name
1639K	Treasure Hunt graphs, interactive
1639J	Treasure Hunt graphs, interactive
1639I	Treasure Hunt graphs, interactive
1639H	Treasure Hunt graphs, interactive
1639G	Treasure Hunt graphs, interactive
1639F	Treasure Hunt graphs, interactive
1639E	Treasure Hunt graphs, interactive
1639D	Treasure Hunt graphs, interactive
1639C	Treasure Hunt graphs, interactive
1639B	Treasure Hunt graphs, interactive
1639A	Treasure Hunt graphs, interactive
1340E	Nastya and Bees graphs, interactive, probabilities	3000	x40
1578I	Interactive Rays geometry, interactive	3300	x43
1442F	Differentiating Games games, interactive	3400	x56
1428H	Rotary Laser Lock binary search, interactive	3500	x62
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x74
1158E	Strange device binary search, interactive, math, trees	3400	x77
1444E	Finding the Vertex brute force, dfs and similar, dp, interactive, trees	3500	x86
1275F	Шардирование постов *special problem, binary search, interactive		x91
772E	Verifying Kingdom binary search, divide and conquer, interactive, trees	3200	x92
1201E1	Knightmare (easy) graphs, interactive, shortest paths	2900	x93
1201E2	Knightmare (hard) graphs, interactive, shortest paths	3000	x100
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x106
1423M	Milutin's Plums interactive	2800	x106
1299E	So Mean interactive, math	3400	x106
1179E	Alesya and Discrete Math divide and conquer, interactive	3200	x116
1466I	The Riddle of the Sphinx binary search, data structures, data structures, interactive	3400	x120
1145G	AI Takeover interactive		x122
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x123
1499G	Graph Coloring data structures, graphs, interactive	3100	x135
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x144
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x151
1147F	Zigzag Game games, interactive	3500	x159
1482G	Vabank binary search, interactive	3200	x170
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x190
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x191
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x199
1090F	How to Learn You Score constructive algorithms, interactive	2600	x207
1633F	Perfect Matching data structures, divide and conquer, interactive, trees	2800	x219
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x234
753C	Interactive Bulls and Cows (Hard) brute force, constructive algorithms, interactive	2500	x239
788D	Finding lines constructive algorithms, divide and conquer, interactive	3000	x243
1147E	Rainbow Coins interactive	3000	x255
1403A	The Potion of Great Power *special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers	2400	x256
1142E	Pink Floyd graphs, interactive	3200	x266
1007C	Guess two numbers binary search, interactive	3000	x274
1291F	Coffee Varieties (easy version) graphs, interactive	2800	x283
1129E	Legendary Tree binary search, interactive, trees	3100	x295
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x296
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x301
1372F	Omkar and Modes binary search, divide and conquer, interactive	2700	x317
1089C	Cactus Search interactive	2500	x325
1028G	Guess the number dp, interactive	3000	x339
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x352
1438F	Olha and Igor interactive, probabilities, trees	3000	x352
1578M	The Mind constructive algorithms, interactive, probabilities	2700	x363
916D	Jamie and To-do List data structures, interactive, trees	2200	x371
750F	New Year and Finding Roots constructive algorithms, implementation, interactive, trees	2800	x371
1081F	Tricky Interactor constructive algorithms, implementation, interactive	2600	x376
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x385
1336D	Yui and Mahjong Set constructive algorithms, interactive	3200	x393
1033E	Hidden Bipartite Graph binary search, constructive algorithms, dfs and similar, graphs, interactive	2800	x396
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x399
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2800	x474
1354G	Find a Gift binary search, interactive, probabilities	2600	x519
1080F	Katya and Segments Sets data structures, interactive, sortings	2400	x526
1061F	Lost Root interactive, probabilities	2400	x538
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x553
1673F	Anti-Theft Road Planning bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math	2400	x559
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x593
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x618
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x638
1491F	Magnets binary search, constructive algorithms, interactive	2700	x720
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x722
1368F	Lamps on a Circle games, implementation, interactive, math	2600	x731
1100D	Dasha and Chess constructive algorithms, games, interactive	2500	x764
1599H	Hidden Fortress interactive, math	2100	x785
835E	The penguin's game binary search, constructive algorithms, interactive	2400	x838
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x851
1666I	Interactive Treasure Hunt brute force, constructive algorithms, geometry, interactive, math	2200	x943
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x993
1205C	Palindromic Paths implementation, interactive	2400	x1001
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x1006
710F	String Set Queries brute force, data structures, hashing, interactive, string suffix structures, strings	2400	x1020
1370F2	The Hidden Pair (Hard Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2700	x1031
1174F	Ehab and the Big Finale constructive algorithms, divide and conquer, graphs, implementation, interactive, trees	2400	x1031
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x1070
870D	Something with XOR Queries brute force, interactive, probabilities	2000	x1094
1470C	Strange Shuffle binary search, brute force, constructive algorithms, interactive	2500	x1114
1370F1	The Hidden Pair (Easy Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2400	x1150
1155E	Guess the Root brute force, interactive, math	2200	x1171
1406E	Deleting Numbers interactive, math, number theory	2600	x1237
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1270
1153E	Serval and Snake binary search, brute force, interactive	2200	x1296
809B	Glad to see you! binary search, interactive	2200	x1305
811D	Vladik and Favorite Game constructive algorithms, dfs and similar, graphs, interactive	2100	x1310
1617D2	Too Many Impostors (hard version) constructive algorithms, implementation, interactive, math	2400	x1334
713B	Searching Rectangles binary search, constructive algorithms, interactive	2200	x1340
1044B	Intersecting Subtrees dfs and similar, interactive, trees	1900	x1455
862D	Mahmoud and Ehab and the binary string binary search, divide and conquer, interactive	2000	x1515

←