Problemset - Codeforces

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Educational Codeforces Round 167 (Rated for Div. 2)
22:56:06
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Problems

#	Name
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x27099
1540E	Tasty Dishes math, matrices	3500	x102
1540C2	Converging Array (Hard Version) dp, math	2900	x442
1540C1	Converging Array (Easy Version) dp, math	2700	x604
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2515
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19742
1538G	Gift Set binary search, greedy, math, ternary search	2100	x4425
1538F	Interesting Function binary search, dp, math, number theory	1500	x18666
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13258
1538C	Number of Pairs binary search, data structures, math, two pointers	1300	x27525
1538B	Friends and Candies greedy, math	800	x31314
1537F	Figure Fixing constructive algorithms, dfs and similar, dsu, graphs, greedy, math	2200	x2398
1537D	Deleting Divisors games, math, number theory	1700	x11989
1537C	Challenging Cliffs constructive algorithms, greedy, implementation, math	1200	x26758
1537B	Bad Boy constructive algorithms, greedy, math	900	x28622
1537A	Arithmetic Array greedy, math	800	x36480
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x920
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2360
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29898
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12606
1534B	Histogram Ugliness greedy, implementation, math	1100	x12408
1533A	Travel to Bertown *special problem, implementation, math		x1072
1532B	Frog Jumping *special problem, math		x821
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x755
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x8980
1530A	Binary Decimal greedy, math	800	x20834
1529B	Sifid and Strange Subsequences greedy, math, sortings	1100	x20409
1529A	Eshag Loves Big Arrays constructive algorithms, greedy, math	800	x29516
1528F	AmShZ Farm combinatorics, fft, math	3300	x280
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8542
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1848
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13230
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1034
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2373
1526B	I Hate 1111 dp, math, number theory	1400	x29374
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2003
1525A	Potion-making math, number theory	800	x25153
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1551
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20978
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35944
1520E	Arranging The Sheep greedy, math	1400	x20449
1520D	Same Differences data structures, hashing, math	1200	x44156
1520B	Ordinary Numbers brute force, math, number theory	800	x43409
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x14780
1519B	The Cake Is a Lie dp, math	800	x30247
1519A	Red and Blue Beans math	800	x28426
1517A	Sum of 2050 greedy, math	800	x25192
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x826
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11639
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x961
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3420
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24423
1515A	Phoenix and Gold constructive algorithms, greedy, math	800	x20085
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x23543
1514A	Perfectly Imperfect Array math, number theory	800	x23892
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1428
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x14074
1512G	Short Task brute force, dp, math, number theory	1700	x7926
1512E	Permutation by Sum brute force, greedy, math	1600	x10145
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2488
1511B	GCD Length constructive algorithms, math, number theory	1100	x22193
1510J	Japanese Game constructive algorithms, math	2700	x511
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x454
1510D	Digits dp, math, number theory	2100	x1809
1506F	Triangular Paths constructive algorithms, graphs, math, shortest paths, sortings	2000	x3127
1506A	Strange Table math	800	x30270
1505F	Math *special problem, math	2200	x1480
1504B	Flip the Bits constructive algorithms, greedy, implementation, math	1200	x17693
1503E	2-Coloring combinatorics, dp, math	3100	x598
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x2009
1500A	Going Home brute force, hashing, implementation, math	1800	x8625
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1424
1499D	The Number of Pairs dp, math, number theory	2100	x5577
1499C	Minimum Grid Path brute force, data structures, greedy, math	1500	x12425
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21059
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x858
1498A	GCD Sum brute force, math	800	x22826
1497E2	Square-free division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1576
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8106
1497C2	k-LCM (hard version) constructive algorithms, math	1600	x16707
1497C1	k-LCM (easy version) constructive algorithms, math	1200	x24942
1497B	M-arrays constructive algorithms, greedy, math	1200	x19009
1496B	Max and Mex math	1100	x17293
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1198
1495A	Diamond Miner geometry, greedy, math, sortings	1200	x16803
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x877
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4797
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5973
1492B	Card Deck data structures, greedy, math	1100	x18196
1492A	Three swimmers math	800	x22509
1491G	Switch and Flip constructive algorithms, graphs, math	2800	x738
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6975
1491B	Minimal Cost brute force, math	1200	x13631
1490G	Old Floppy Drive binary search, data structures, math	1900	x5546
1490F	Equalize the Array binary search, data structures, greedy, math, sortings	1500	x15678
1490C	Sum of Cubes binary search, brute force, brute force, math	1100	x31928
1490B	Balanced Remainders brute force, constructive algorithms, math	1000	x25803
1490A	Dense Array greedy, math	800	x30818
1488J	Flower Shop *special problem, data structures, fft, math	3100	x34
1488C	Two Policemen *special problem, binary search, brute force, math	1900	x403