Problemset - Codeforces

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Educational Codeforces Round 167 (Rated for Div. 2)
32:56:40
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Problems

#	Name
1363D	Guess The Maximums binary search, implementation, interactive, math	2100	x3893
1363C	Game On Leaves games, trees	1600	x18069
1363B	Subsequence Hate implementation, strings	1400	x23112
1363A	Odd Selection brute force, implementation, math	1200	x34839
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x17535
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x18580
1362A	Johnny and Ancient Computer implementation	1000	x22990
1361F	Johnny and New Toy data structures, implementation, math	3300	x148
1361E	James and the Chase dfs and similar, graphs, probabilities, trees	3000	x641
1361D	Johnny and James greedy, implementation, math, trees	2900	x312
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1446
1361B	Johnny and Grandmaster greedy, implementation, math, sortings	1900	x3441
1361A	Johnny and Contribution constructive algorithms, graphs, greedy, sortings	1700	x8225
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4357
1360G	A/B Matrix constructive algorithms, greedy, math	1900	x7492
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x11989
1360E	Polygon dp, graphs, implementation, shortest paths	1300	x24660
1360D	Buying Shovels math, number theory	1300	x31527
1360C	Similar Pairs constructive algorithms, graph matchings, greedy, sortings	1100	x32049
1360B	Honest Coach greedy, sortings	800	x46705
1360A	Minimal Square greedy, math	800	x48832
1359F	RC Kaboom Show binary search, brute force, data structures, geometry, math	2900	x401
1359E	Modular Stability combinatorics, math, number theory	2000	x5845
1359D	Yet Another Yet Another Task data structures, dp, implementation, two pointers	2000	x9106
1359C	Mixing Water binary search, math	1700	x13426
1359B	New Theatre Square brute force, dp, greedy, implementation, two pointers	1000	x27279
1359A	Berland Poker brute force, greedy, math	1000	x29029
1358F	Tasty Cookie binary search, constructive algorithms, greedy, implementation	2700	x439
1358E	Are You Fired? constructive algorithms, data structures, greedy, implementation	2400	x2140
1358D	The Best Vacation binary search, brute force, greedy, implementation, two pointers	1900	x8065
1358C	Celex Update math	1600	x17133
1358B	Maria Breaks the Self-isolation greedy, sortings	1000	x24737
1358A	Park Lighting greedy, math	800	x38562
1357E2	Root of quantum Fourier transform		x49
1357E1	Power of quantum Fourier transform		x191
1357D5	Quantum Classification - Dataset 7		x80
1357D4	Quantum Classification - Dataset 6		x83
1357D3	Quantum Classification - Dataset 5		x103
1357D2	Quantum Classification - Dataset 4		x110
1357D1	Quantum Classification - Dataset 3		x123
1357C2	Prepare superposition of basis states with the same parity		x301
1357C1	Prepare superposition of basis states with 0s		x346
1357B2	"Is the number divisible by 3?" oracle		x212
1357B1	"Is the bit string balanced?" oracle		x212
1357A7	Distinguish Y, XZ, -Y and -XZ		x180
1357A6	Distinguish four Pauli gates		x165
1357A5	Distinguish Rz(θ) from Ry(θ)		x238
1357A4	Distinguish Rz from R1		x348
1357A3	Distinguish H from X		x475
1357A2	Distinguish I, CNOTs and SWAP		x507
1357A1	Figure out direction of CNOT		x629
1356D2	Quantum Classification - 2 *special problem		x124
1356D1	Quantum Classification - 1 *special problem		x134
1356C	Prepare state \|01⟩ + \|10⟩ + \|11⟩ *special problem		x300
1356B2	Decrement *special problem		x280
1356B1	Increment *special problem		x280
1356A5	Distinguish Z from -Z *special problem		x328
1356A4	Distinguish I ⊗ X from CNOT *special problem		x456
1356A3	Distinguish Z from S *special problem		x458
1356A2	Distinguish I from Z *special problem		x485
1356A1	Distinguish I from X *special problem		x600
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x822
1355E	Restorer Distance binary search, greedy, math, sortings, ternary search	2100	x4802
1355D	Game With Array constructive algorithms, math	1400	x17614
1355C	Count Triangles binary search, implementation, math, two pointers	1800	x10319
1355B	Young Explorers dp, greedy, sortings	1200	x25099
1355A	Sequence with Digits brute force, implementation, math	1200	x25839
1354G	Find a Gift binary search, interactive, probabilities	2600	x752
1354F	Summoning Minions constructive algorithms, dp, flows, graph matchings, greedy, sortings	2500	x1040
1354E	Graph Coloring dfs and similar, dp, graphs	2100	x3129
1354D	Multiset binary search, data structures	1900	x8414
1354C2	Not So Simple Polygon Embedding binary search, brute force, geometry, math	2000	x5884
1354C1	Simple Polygon Embedding binary search, geometry, math, ternary search	1400	x15412
1354B	Ternary String binary search, dp, implementation, two pointers	1200	x29722
1354A	Alarm Clock math	900	x23453
1353F	Decreasing Heights brute force, dp	2200	x3120
1353E	K-periodic Garland brute force, dp, greedy	1900	x6875
1353D	Constructing the Array constructive algorithms, data structures, sortings	1600	x17573
1353C	Board Moves math	1000	x34586
1353B	Two Arrays And Swaps greedy, sortings	800	x48185
1353A	Most Unstable Array constructive algorithms, greedy, math	800	x39642
1352G	Special Permutation constructive algorithms	1600	x20291
1352F	Binary String Reconstruction constructive algorithms, dfs and similar, math	1500	x16541
1352E	Special Elements brute force, implementation, two pointers	1500	x19717
1352D	Alice, Bob and Candies implementation	1300	x25251
1352C	K-th Not Divisible by n binary search, math	1200	x51438
1352B	Same Parity Summands constructive algorithms, math	1200	x36091
1352A	Sum of Round Numbers implementation, math	800	x74313
1351C	Skier data structures, implementation	1400	x8330
1351B	Square? brute force, implementation, math	900	x16613
1351A	A+B (Trial Problem) implementation	800	x23174
1350B	Orac and Models dp, math, number theory	1400	x21077
1350A	Orac and Factors math	900	x25747
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x108
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x403
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x88
1349D	Slime and Biscuits math, probabilities	3200	x873
1349C	Orac and Game of Life dfs and similar, graphs, implementation, shortest paths	2000	x4302
1349B	Orac and Medians constructive algorithms, greedy, math	2000	x7850
1349A	Orac and LCM data structures, math, number theory	1600	x16312