Problemset - Codeforces

→ Pay attention

Before contest
Educational Codeforces Round 173 (Rated for Div. 2)
38:58:39
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1475B	New Year's Number brute force, dp, math	900	x50010
1475A	Odd Divisor math, number theory	900	x63396
1474F	1 2 3 4 ... dp, math, matrices	3000	x252
1474E	What Is It? constructive algorithms, greedy	2500	x1356
1474D	Cleaning data structures, dp, greedy, math	2200	x4043
1474C	Array Destruction brute force, constructive algorithms, data structures, greedy, implementation, sortings	1700	x12876
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x29661
1474A	Puzzle From the Future greedy	800	x22672
1473G	Tiles combinatorics, dp, fft, math	2800	x406
1473F	Strange Set flows, math	2700	x981
1473E	Minimum Path graphs, shortest paths	2400	x3782
1473D	Program data structures, dp, implementation, strings	1700	x9783
1473C	No More Inversions constructive algorithms, math	1500	x12783
1473B	String LCM brute force, math, number theory, strings	1000	x31915
1473A	Replacing Elements greedy, implementation, math, sortings	800	x34133
1472G	Moving to the Capital dfs and similar, dp, graphs, shortest paths	2100	x4827
1472F	New Year's Puzzle brute force, dp, graph matchings, greedy, sortings	2100	x3099
1472E	Correct Placement binary search, data structures, dp, sortings, two pointers	1700	x8189
1472D	Even-Odd Game dp, games, greedy, sortings	1200	x27880
1472C	Long Jumps dp, graphs	1100	x31835
1472B	Fair Division dp, greedy, math	800	x51860
1472A	Cards for Friends greedy, math	800	x42451
1471B	Strange List brute force, greedy, implementation, math	1100	x19420
1471A	Strange Partition greedy, math, number theory	900	x26985
1470F	Strange Covering divide and conquer	3500	x136
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x300
1470D	Strange Housing constructive algorithms, dfs and similar, graph matchings, graphs, greedy	2200	x3773
1470C	Strange Shuffle binary search, brute force, constructive algorithms, interactive	2500	x1355
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6378
1470A	Strange Birthday Party binary search, dp, greedy, sortings, two pointers	1300	x22969
1469F	Power Sockets binary search, data structures, greedy	2600	x968
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x2007
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9520
1469C	Building a Fence dp, greedy, implementation, two pointers	1600	x10831
1469B	Red and Blue dp, greedy	1000	x27737
1469A	Regular Bracket Sequence constructive algorithms, greedy	1000	x27750
1468N	Waste Sorting greedy, implementation	900	x8296
1468M	Similar Sets data structures, graphs, implementation	2300	x965
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x328
1468K	The Robot brute force, implementation	1600	x5178
1468J	Road Reform dsu, graphs, greedy	1800	x4457
1468I	Plane Tiling geometry, implementation, math	2500	x516
1468H	K and Medians constructive algorithms, greedy, math	2200	x1830
1468G	Hobbits binary search, geometry	2500	x827
1468F	Full Turn geometry, hashing, number theory	1700	x3789
1468E	Four Segments greedy	800	x8907
1468D	Firecrackers binary search, sortings	1700	x4773
1468C	Berpizza data structures, implementation	1400	x8188
1468B	Bakery data structures, dsu	2900	x222
1468A	LaIS data structures, dp, greedy	2200	x1702
1467E	Distinctive Roots in a Tree data structures, dfs and similar, dp, trees	2500	x1458
1467D	Sum of Paths combinatorics, dp, math	2200	x3729
1467C	Three Bags constructive algorithms, greedy	1900	x6459
1467B	Hills And Valleys brute force, implementation	1700	x11042
1467A	Wizard of Orz constructive algorithms, greedy, math	900	x24474
1466I	The Riddle of the Sphinx binary search, data structures, data structures, interactive	3400	x202
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x318
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x946
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2893
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7390
1466D	13th Labour of Heracles data structures, greedy, sortings, trees	1500	x11547
1466C	Canine poetry dp, greedy, strings	1300	x17801
1466B	Last minute enhancements dp, greedy	800	x22769
1466A	Bovine Dilemma brute force, geometry, math	800	x22644
1464F	My Beautiful Madness data structures, trees	3500	x328
1463F	Max Correct Set bitmasks, dp, math	3100	x613
1463E	Plan of Lectures constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees	2400	x1548
1463D	Pairs binary search, constructive algorithms, greedy, two pointers	1900	x4491
1463C	Busy Robot implementation	1800	x5693
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x19632
1463A	Dungeon binary search, math	1100	x25848
1462F	The Treasure of The Segments binary search, data structures, greedy	1800	x7084
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9937
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13995
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16930
1462C	Unique Number brute force, greedy, math	900	x33137
1462B	Last Year's Substring dp, implementation, strings	800	x27619
1462A	Favorite Sequence implementation, two pointers	800	x42586
1461F	Mathematical Expression constructive algorithms, dp, greedy	2700	x571
1461E	Water Level brute force, graphs, greedy, implementation, math	2200	x2136
1461D	Divide and Summarize binary search, brute force, data structures, divide and conquer, implementation, sortings	1600	x9347
1461C	Random Events dp, math, probabilities	1500	x11386
1461B	Find the Spruce brute force, dp, implementation	1400	x12701
1461A	String Generation constructive algorithms, greedy	800	x18624
1459B	Move and Turn dp, math	1300	x15198
1459A	Red-Blue Shuffle math, probabilities	800	x17069
1458F	Range Diameter Sum data structures, trees	3500	x286
1458E	Nim Shortcuts data structures, games	3100	x499
1458D	Flip and Reverse data structures, graphs, greedy	3100	x1178
1458C	Latin Square math, matrices	2700	x1362
1458B	Glass Half Spilled dp	2000	x3604
1458A	Row GCD math, number theory	1600	x18834
1456E	XOR-ranges dp, greedy	3500	x287
1455G	Forbidden Value data structures, dp	2900	x422
1455F	String and Operations dp, greedy	2800	x457
1455E	Four Points brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search	2400	x1552
1455D	Sequence and Swaps dp, greedy, sortings	1600	x12417
1455C	Ping-pong constructive algorithms, games, math	1100	x19723
1455B	Jumps constructive algorithms, math	1200	x22097
1455A	Strange Functions math, number theory	800	x26585