Problemset - Codeforces

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Codeforces Round (Div. 2)
6 days

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Problems

#	Name
1447B	Numbers Box greedy, math	1000	x16611
1447A	Add Candies constructive algorithms, math	800	x13791
1446F	Line Distance binary search, data structures, geometry	3200	x334
1446E	Long Recovery constructive algorithms, dfs and similar	3500	x85
1446D2	Frequency Problem (Hard Version) data structures, greedy, two pointers	3000	x1306
1446D1	Frequency Problem (Easy Version) data structures, greedy	2600	x1745
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3631
1446B	Catching Cheaters dp, strings	1800	x7845
1446A	Knapsack constructive algorithms, greedy, sortings	1300	x15502
1445B	Elimination greedy, math	900	x15280
1445A	Array Rearrangment greedy, sortings	800	x19114
1444E	Finding the Vertex brute force, dfs and similar, dp, interactive, trees	3500	x137
1444D	Rectangular Polyline constructive algorithms, dp, geometry	2900	x571
1444C	Team-Building data structures, dfs and similar, dsu, graphs	2500	x1600
1444B	Divide and Sum combinatorics, math, sortings	1900	x6307
1444A	Division brute force, math, number theory	1500	x13029
1443E	Long Permutation brute force, math, two pointers	2400	x1257
1443C	The Delivery Dilemma binary search, greedy, sortings	1400	x15275
1443B	Saving the City dp, greedy, math, sortings	1300	x15780
1443A	Kids Seating constructive algorithms, math	800	x16238
1442F	Differentiating Games games, interactive	3400	x131
1442E	Black, White and Grey Tree binary search, constructive algorithms, dfs and similar, dp, greedy, trees	3000	x597
1442D	Sum data structures, divide and conquer, dp, greedy	2800	x2226
1442C	Graph Transpositions dfs and similar, graphs, greedy, shortest paths	2400	x1691
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4486
1442A	Extreme Subtraction constructive algorithms, dp, greedy	1800	x8877
1440B	Sum of Medians greedy, math	900	x18905
1440A	Buy the String implementation, math	800	x19735
1439E	Cheat and Win bitmasks, data structures, games, trees	3500	x221
1439D	INOI Final Contests combinatorics, dp, fft	3100	x371
1439C	Greedy Shopping binary search, data structures, divide and conquer, greedy, implementation	2600	x1876
1439B	Graph Subset Problem constructive algorithms, data structures, graphs	2600	x1471
1439A2	Binary Table (Hard Version) constructive algorithms, graphs, greedy, implementation	1900	x5113
1439A1	Binary Table (Easy Version) constructive algorithms, implementation	1500	x9374
1438F	Olha and Igor interactive, probabilities, trees	3000	x635
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1342
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4190
1438C	Engineer Artem 2-sat, chinese remainder theorem, constructive algorithms, fft, flows	2000	x10498
1438B	Valerii Against Everyone constructive algorithms, data structures, greedy, sortings	1000	x19725
1438A	Specific Tastes of Andre constructive algorithms, implementation	800	x19252
1437G	Death DBMS data structures, string suffix structures, strings, trees	2600	x1003
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1275
1437E	Make It Increasing binary search, constructive algorithms, data structures, dp, implementation	2200	x3455
1437D	Minimal Height Tree graphs, greedy, shortest paths, trees	1600	x12752
1437C	Chef Monocarp dp, flows, graph matchings, greedy, math, sortings	1800	x10507
1437B	Reverse Binary Strings constructive algorithms, greedy	1200	x19196
1437A	Marketing Scheme brute force, constructive algorithms, greedy, math	800	x18013
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x526
1436E	Complicated Computations binary search, data structures, two pointers	2400	x2266
1436D	Bandit in a City binary search, dfs and similar, graphs, greedy, trees	1900	x6062
1436C	Binary Search binary search, combinatorics	1500	x10803
1436B	Prime Square constructive algorithms, math	900	x20573
1436A	Reorder math	800	x22685
1434E	A Convex Game dsu, games	3500	x176
1433G	Reducing Delivery Cost brute force, graphs, shortest paths	2100	x4337
1433F	Zero Remainder Sum dp	2100	x6075
1433E	Two Round Dances combinatorics, math	1300	x18452
1433D	Districts Connection constructive algorithms, dfs and similar	1200	x23166
1433C	Dominant Piranha constructive algorithms, greedy	900	x26974
1433B	Yet Another Bookshelf greedy, implementation	800	x28392
1433A	Boring Apartments implementation, math	800	x52382
1431J	Zero-XOR Array *special problem, dp	3400	x44
1431I	Cyclic Shifts *special problem, strings	2900	x46
1431H	Rogue-like Game *special problem, brute force, greedy, two pointers	2600	x67
1431G	Number Deletion Game *special problem, dp, games, greedy	2100	x189
1431F	Neural Network Problem *special problem, binary search, greedy	2100	x156
1431E	Chess Match *special problem	2000	x221
1431D	Used Markers *special problem, greedy	1500	x457
1431C	Black Friday *special problem, implementation	1600	x705
1431B	Polycarp and the Language of Gods *special problem, implementation, two pointers	1400	x1012
1431A	Selling Hamburgers *special problem	800	x1865
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x711
1430F	Realistic Gameplay dp, greedy	2600	x913
1430E	String Reversal data structures, greedy, strings	1900	x6500
1430D	String Deletion binary search, data structures, greedy, two pointers	1700	x8802
1430C	Numbers on Whiteboard constructive algorithms, data structures, greedy, implementation, math	1000	x24481
1430B	Barrels greedy, implementation, sortings	800	x19379
1430A	Number of Apartments brute force, constructive algorithms, math	900	x20896
1428H	Rotary Laser Lock binary search, interactive	3500	x109
1428G2	Lucky Numbers (Hard Version) dp, greedy	3000	x633
1428G1	Lucky Numbers (Easy Version) dp, greedy	2900	x569
1428F	Fruit Sequences binary search, data structures, divide and conquer, dp, two pointers	2400	x2306
1428E	Carrots for Rabbits binary search, data structures, greedy, math, sortings	2200	x3666
1428D	Bouncing Boomerangs constructive algorithms, greedy, implementation	1900	x4489
1428C	ABBB brute force, data structures, greedy, strings	1100	x20225
1428B	Belted Rooms graphs, implementation	1200	x14386
1428A	Box is Pull math	800	x16320
1427H	Prison Break binary search, games, geometry, ternary search	3500	x77
1427G	One Billion Shades of Grey flows, graphs	3300	x352
1427F	Boring Card Game data structures, greedy, trees	3200	x313
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1411
1427D	Unshuffling a Deck constructive algorithms, implementation	2000	x3508
1427C	The Hard Work of Paparazzi dp	2000	x5667
1427B	Chess Cheater greedy, implementation, sortings	1400	x10908
1427A	Avoiding Zero math, sortings	900	x17227
1426F	Number of Subsequences combinatorics, dp, strings	2000	x5359
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x7424
1426D	Non-zero Segments constructive algorithms, data structures, greedy, sortings	1500	x16012
1426C	Increase and Copy binary search, constructive algorithms, math	1100	x19388
1426B	Symmetric Matrix implementation	900	x20650