Problemset - Codeforces

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Codeforces Round (Div. 2)
4 days
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Problems

#	Name
1505F	Math *special problem, math	2200	x1503
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1801
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x795
1505C	Fibonacci Words *special problem, implementation	1400	x6431
1505B	DMCA *special problem, implementation, number theory	1600	x6157
1505A	Is it rated - 2 *special problem, implementation, interactive	900	x14464
1504B	Flip the Bits constructive algorithms, greedy, implementation, math	1200	x18506
1504A	Déjà Vu constructive algorithms, strings	800	x21714
1503F	Balance the Cards constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation	3500	x183
1503E	2-Coloring combinatorics, dp, math	3100	x693
1503D	Flip the Cards 2-sat, constructive algorithms, data structures, greedy, sortings, two pointers	2600	x1084
1503C	Travelling Salesman Problem binary search, data structures, dp, greedy, shortest paths, sortings, two pointers	2200	x3427
1503B	3-Coloring constructive algorithms, games, interactive	1700	x7035
1503A	Balance the Bits constructive algorithms, greedy	1600	x13399
1501B	Napoleon Cake dp, implementation, sortings	900	x19117
1501A	Alexey and Train implementation	800	x11593
1500F	Cupboards Jumps dp	3500	x349
1500E	Subset Trick binary search, data structures	3300	x216
1500D	Tiles for Bathroom data structures, sortings, two pointers	2900	x458
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x807
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x2044
1500A	Going Home brute force, hashing, implementation, math	1800	x8821
1499G	Graph Coloring data structures, graphs, interactive	3100	x191
1499F	Diameter Cuts combinatorics, dfs and similar, dp, trees	2400	x1337
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1504
1499D	The Number of Pairs dp, math, number theory	2100	x5833
1499C	Minimum Grid Path brute force, data structures, greedy, math	1500	x12644
1499B	Binary Removals brute force, dp, greedy, implementation	1000	x20757
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21248
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x920
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1924
1498D	Bananas in a Microwave dfs and similar, dp, graphs, implementation	2200	x2319
1498C	Planar Reflections brute force, data structures, dp	1600	x9696
1498B	Box Fitting binary search, bitmasks, data structures, greedy	1300	x17160
1498A	GCD Sum brute force, math	800	x23173
1497E2	Square-Free Division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1678
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8309
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1525
1497C2	k-LCM (hard version) constructive algorithms, math	1600	x17250
1497C1	k-LCM (easy version) constructive algorithms, math	1200	x25749
1497B	M-arrays constructive algorithms, greedy, math	1200	x19898
1497A	Meximization brute force, data structures, greedy, sortings	800	x24425
1496B	Max and Mex math	1100	x17550
1496A	Split it! brute force, constructive algorithms, greedy, strings	900	x20901
1495F	Squares constructive algorithms, data structures, dp, graphs, trees	3300	x296
1495E	Qingshan and Daniel brute force, data structures, greedy, implementation	3200	x415
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1319
1495C	Garden of the Sun constructive algorithms, graphs	2300	x2627
1495B	Let's Go Hiking games, greedy	1900	x6005
1495A	Diamond Miner geometry, greedy, math, sortings	1200	x17068
1494F	Delete The Edges brute force, constructive algorithms, dfs and similar, graphs, implementation	2900	x375
1494E	A-Z Graph constructive algorithms, data structures, graphs, hashing	2400	x1768
1494D	Dogeforces constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees	2300	x2575
1494C	1D Sokoban binary search, dp, greedy, implementation, two pointers	1900	x5429
1494B	Berland Crossword bitmasks, brute force, greedy, implementation	1400	x14363
1494A	ABC String bitmasks, brute force, implementation	900	x20868
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x420
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x934
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4992
1493C	K-beautiful Strings binary search, brute force, constructive algorithms, greedy, strings	2000	x4604
1493B	Planet Lapituletti brute force, implementation	1300	x11844
1493A	Anti-knapsack constructive algorithms, greedy	800	x19298
1492E	Almost Fault-Tolerant Database brute force, constructive algorithms, dfs and similar, greedy, implementation	2500	x1185
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x6093
1492C	Maximum width binary search, data structures, dp, greedy, two pointers	1500	x16086
1492B	Card Deck data structures, greedy, math	1100	x18390
1492A	Three swimmers math	800	x22639
1491I	Ruler Of The Zoo brute force, data structures	3500	x82
1491H	Yuezheng Ling and Dynamic Tree data structures, trees	3400	x810
1491G	Switch and Flip constructive algorithms, graphs, math	2800	x822
1491F	Magnets binary search, constructive algorithms, interactive	2700	x998
1491E	Fib-tree brute force, dfs and similar, divide and conquer, number theory, trees	2400	x2155
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x7173
1491C	Pekora and Trampoline brute force, data structures, dp, greedy, implementation	1700	x7911
1491B	Minimal Cost brute force, math	1200	x13798
1491A	K-th Largest Value brute force, greedy, implementation	800	x18214
1490G	Old Floppy Drive binary search, data structures, math	1900	x5647
1490F	Equalize the Array binary search, data structures, greedy, math, sortings	1500	x16145
1490E	Accidental Victory binary search, data structures, greedy	1400	x19073
1490D	Permutation Transformation dfs and similar, divide and conquer, implementation	1200	x19510
1490C	Sum of Cubes binary search, brute force, brute force, math	1100	x33160
1490B	Balanced Remainders brute force, constructive algorithms, math	1000	x26178
1490A	Dense Array greedy, math	800	x31160
1488J	Flower Shop *special problem, data structures, fft, math	3100	x35
1488I	Demonic Invasion *special problem, flows	3100	x37
1488H	Build From Suffixes *special problem, combinatorics, data structures	2800	x58
1488G	Painting Numbers *special problem, data structures, greedy, number theory	2500	x123
1488F	Dogecoin special problem, special problem, binary search, data structures	2300	x176
1488E	Palindromic Doubles *special problem, data structures, dp	2200	x212
1488D	Problemsolving Marathon *special problem, binary search, greedy	1900	x337
1488C	Two Policemen *special problem, binary search, brute force, math	1900	x405
1488B	RBS Deletion *special problem, greedy	1800	x558
1488A	From Zero To Y *special problem, math	900	x1403
1487G	String Counting combinatorics, dp, fft, math	2700	x595
1487F	Ones dp, greedy, shortest paths	2900	x381
1487E	Cheap Dinner brute force, data structures, graphs, greedy, implementation, sortings, two pointers	2000	x4552
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x17880
1487C	Minimum Ties brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math	1500	x14142
1487B	Cat Cycle math, number theory	1200	x20997
1487A	Arena implementation, sortings	800	x26519