Problemset - Codeforces

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Codeforces Round 973 (Div. 2)
3 days
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Problems

#	Name
1475B	New Year's Number brute force, dp, math	900	x48586
1475A	Odd Divisor math, number theory	900	x60056
1474F	1 2 3 4 ... dp, math, matrices	3000	x244
1474D	Cleaning data structures, dp, greedy, math	2200	x3973
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x28387
1473G	Tiles combinatorics, dp, fft, math	2800	x391
1473F	Strange Set flows, math	2700	x952
1473C	No More Inversions constructive algorithms, math	1500	x12655
1473B	String LCM brute force, math, number theory, strings	1000	x31239
1473A	Replacing Elements greedy, implementation, math, sortings	800	x33572
1472B	Fair Division dp, greedy, math	800	x49861
1472A	Cards for Friends greedy, math	800	x41809
1471B	Strange List brute force, greedy, implementation, math	1100	x19309
1471A	Strange Partition greedy, math, number theory	900	x26011
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6302
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9405
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x318
1468I	Plane Tiling geometry, implementation, math	2500	x495
1468H	K and Medians constructive algorithms, greedy, math	2200	x1786
1467D	Sum of Paths combinatorics, dp, math	2200	x3665
1467A	Wizard of Orz constructive algorithms, greedy, math	900	x24281
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x272
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x920
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2865
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7281
1466A	Bovine Dilemma brute force, geometry, math	800	x22503
1463F	Max Correct Set bitmasks, dp, math	3100	x582
1463A	Dungeon binary search, math	1100	x25468
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9654
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13692
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16681
1462C	Unique Number brute force, greedy, math	900	x32410
1461E	Water Level brute force, graphs, greedy, implementation, math	2200	x2102
1461C	Random Events dp, math, probabilities	1500	x11176
1459B	Move and Turn dp, math	1300	x14694
1459A	Red-Blue Shuffle math, probabilities	800	x16982
1458C	Latin Square math, matrices	2700	x1306
1458A	Row GCD math, number theory	1600	x17559
1455E	Four Points brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search	2400	x1516
1455C	Ping-pong constructive algorithms, games, math	1100	x19550
1455B	Jumps constructive algorithms, math	1200	x21765
1455A	Strange Functions math, number theory	800	x26390
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x20347
1453D	Checkpoints brute force, constructive algorithms, greedy, math, probabilities	1900	x4147
1452D	Radio Towers combinatorics, dp, math	1600	x7943
1452B	Toy Blocks binary search, greedy, math, sortings	1400	x14672
1452A	Robot Program math	800	x22062
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2953
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4340
1451D	Circle Game games, geometry, math	1700	x9497
1451A	Subtract or Divide greedy, math	800	x24174
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x217
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x433
1450C2	Errich-Tac-Toe (Hard Version) constructive algorithms, math	2300	x3687
1450C1	Errich-Tac-Toe (Easy Version) constructive algorithms, math	2100	x5487
1447B	Numbers Box greedy, math	1000	x16456
1447A	Add Candies constructive algorithms, math	800	x13775
1445B	Elimination greedy, math	900	x15254
1444B	Divide and Sum combinatorics, math, sortings	1900	x6275
1444A	Division brute force, math, number theory	1500	x12983
1443E	Long Permutation brute force, math, two pointers	2400	x1248
1443B	Saving the City dp, greedy, math, sortings	1300	x15749
1443A	Kids Seating constructive algorithms, math	800	x16209
1440B	Sum of Medians greedy, math	900	x18737
1440A	Buy the String implementation, math	800	x19709
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4171
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1218
1437C	Chef Monocarp dp, flows, graph matchings, greedy, math, sortings	1800	x10448
1437A	Marketing Scheme brute force, constructive algorithms, greedy, math	800	x17999
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x523
1436B	Prime Square constructive algorithms, math	900	x20537
1436A	Reorder math	800	x22648
1433E	Two Round Dances combinatorics, math	1300	x18404
1433A	Boring Apartments implementation, math	800	x52036
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x697
1430C	Numbers on Whiteboard constructive algorithms, data structures, greedy, implementation, math	1000	x24381
1430A	Number of Apartments brute force, constructive algorithms, math	900	x20855
1428E	Carrots for Rabbits binary search, data structures, greedy, math, sortings	2200	x3633
1428A	Box is Pull math	800	x16295
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1399
1427A	Avoiding Zero math, sortings	900	x17199
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x7397
1426C	Increase and Copy binary search, constructive algorithms, math	1100	x19334
1426A	Floor Number implementation, math	800	x47699
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x829
1425C	Captain of Knights math	3100	x41
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x4829
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x772
1423F	Coins math	2700	x375
1422F	Boring Queries data structures, math, number theory	2700	x1020
1422C	Bargain combinatorics, dp, math	1700	x8208
1422B	Nice Matrix greedy, implementation, math	1300	x14382
1422A	Fence geometry, math	800	x20861
1421D	Hexagons brute force, constructive algorithms, greedy, implementation, math, shortest paths	1900	x4151
1421A	XORwice bitmasks, greedy, math	800	x28771
1420B	Rock and Lever bitmasks, math	1200	x25526
1420A	Cubes Sorting math, sortings	900	x23327
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3254
1419C	Killjoy greedy, implementation, math	1500	x15341
1419B	Stairs brute force, constructive algorithms, greedy, implementation, math	1200	x16214