Problemset - Codeforces

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Educational Codeforces Round 166 (Rated for Div. 2)
09:09:00
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Problems

#	Name
1527A	And Then There Were K bitmasks	800	x34144
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x253
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1030
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2360
1526C2	Potions (Hard Version) data structures, greedy	1600	x21215
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x21374
1526B	I Hate 1111 dp, math, number theory	1400	x28988
1526A	Mean Inequality constructive algorithms, sortings	800	x23902
1525F	Goblins And Gnomes brute force, dp, flows, graph matchings	2800	x319
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x1973
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9425
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x4340
1525B	Permutation Sort constructive algorithms, greedy	900	x24244
1525A	Potion-making math, number theory	800	x25106
1523H	Hopping Around the Array data structures, dp	3500	x235
1523G	Try Booking data structures, divide and conquer	3200	x404
1523F	Favorite Game bitmasks, dp	3300	x404
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1540
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2088
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8611
1523B	Lord of the Values constructive algorithms	1100	x11980
1523A	Game of Life implementation	800	x13412
1521E	Nastia and a Beautiful Matrix binary search, constructive algorithms, dp, greedy	2700	x653
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x1812
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4289
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20851
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35594
1520G	To Go Or Not To Go? brute force, dfs and similar, graphs, greedy, implementation, shortest paths	2200	x3523
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x2914
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11015
1520E	Arranging The Sheep greedy, math	1400	x20165
1520D	Same Differences data structures, hashing, math	1200	x43217
1520C	Not Adjacent Matrix constructive algorithms	1000	x30793
1520B	Ordinary Numbers brute force, math, number theory	800	x43133
1520A	Do Not Be Distracted! brute force, implementation	800	x49969
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x391
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x809
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x14651
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x16105
1519B	The Cake Is a Lie dp, math	800	x30119
1519A	Red and Blue Beans math	800	x28362
1517H	Fly Around the World dp, geometry	3500	x65
1517G	Starry Night Camping constructive algorithms, flows, graphs	3300	x417
1517F	Reunion combinatorics, dp, trees	3200	x448
1517E	Group Photo binary search, data structures, implementation, two pointers	2500	x954
1517D	Explorer Space dp, graphs, shortest paths	1800	x7373
1517C	Fillomino 2 constructive algorithms, dfs and similar, greedy, implementation	1400	x13091
1517B	Morning Jogging constructive algorithms, greedy, sortings	1200	x13063
1517A	Sum of 2050 greedy, math	800	x25143
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x816
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4113
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11573
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x18241
1516A	Tit for Tat greedy	800	x23167
1515I	Phoenix and Diamonds binary search, data structures, sortings	3400	x226
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x216
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x939
1515F	Phoenix and Earthquake constructive algorithms, dfs and similar, dsu, graphs, greedy, trees	2600	x1693
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3389
1515D	Phoenix and Socks greedy, sortings, two pointers	1500	x11178
1515C	Phoenix and Towers constructive algorithms, data structures, greedy	1400	x16596
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24245
1515A	Phoenix and Gold constructive algorithms, greedy, math	800	x20031
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x590
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x4111
1514C	Product 1 Modulo N greedy, number theory	1600	x14406
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x23058
1514A	Perfectly Imperfect Array math, number theory	800	x23840
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1205
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1418
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5076
1513C	Add One dp, matrices	1600	x13316
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13881
1513A	Array and Peaks constructive algorithms, implementation	800	x19198
1512G	Short Task brute force, dp, math, number theory	1700	x7850
1512F	Education brute force, dp, greedy, implementation	1900	x5973
1512E	Permutation by Sum brute force, greedy, math	1600	x10066
1512D	Corrupted Array constructive algorithms, data structures, greedy	1200	x21819
1512C	A-B Palindrome constructive algorithms, implementation, strings	1200	x19546
1512B	Almost Rectangle implementation	800	x25055
1512A	Spy Detected! brute force, implementation	800	x60428
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x704
1511F	Chainword brute force, data structures, dp, matrices, string suffix structures, strings	2700	x419
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2471
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x11091
1511C	Yet Another Card Deck brute force, data structures, implementation, trees	1100	x22343
1511B	GCD Length constructive algorithms, math, number theory	1100	x22058
1511A	Review Site greedy	800	x27200
1510K	King's Task brute force, graphs, implementation	1200	x5288
1510J	Japanese Game constructive algorithms, math	2700	x507
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x452
1510H	Hard Optimization dp	3200	x98
1510G	Guide	2100	x1260
1510F	Fiber Shape	2800	x58
1510E	Equilibrium Point /\textbackslash/\textbackslash	2700	x242
1510D	Digits dp, math, number theory	2100	x1805
1510C	Cactus Not Enough dfs and similar, graph matchings, graphs	2900	x206
1510B	Button Lock flows, graph matchings, graphs	2600	x719
1510A	ASCII Automata Art	3100	x152
1509C	The Sports Festival dp, greedy	1800	x11898