Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
01:38:17
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Problems

#	Name
1662K	Pandemic Restrictions geometry, ternary search		x342
1662J	Training Camp flows, graphs		x238
1662I	Ice Cream Shop brute force, implementation, sortings		x2233
1662H	Boundary brute force, math		x3112
1662G	Gastronomic Event dp, greedy, trees		x484
1662F	Antennas data structures, dfs and similar, graphs, graphs, implementation, implementation, shortest paths, shortest paths		x1080
1662E	Round Table math		x147
1662D	Evolution of Weasels greedy, implementation, strings		x1921
1662C	European Trip dp, graphs, math, matrices		x345
1662B	Toys greedy, strings		x141
1662A	Organizing SWERC brute force, implementation		x4484
1661F	Teleporters binary search, greedy	2600	x618
1661E	Narrow Components brute force, data structures, dp, dsu, math, trees	2500	x970
1661D	Progressions Covering data structures, greedy	1900	x4815
1661C	Water the Trees binary search, greedy, math	1700	x9519
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x18129
1661A	Array Balancing greedy, math	800	x18480
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2780
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7374
1660E	Matrix and Shifts brute force, constructive algorithms, greedy, implementation	1600	x7425
1660D	Maximum Product Strikes Back brute force, implementation, math, two pointers	1600	x8854
1660C	Get an Even String dp, greedy, strings	1300	x19853
1660B	Vlad and Candies math	800	x28298
1660A	Vasya and Coins greedy, math	800	x36404
1659F	Tree and Permutation Game dfs and similar, games, graphs, trees	3000	x193
1659E	AND-MEX Walk bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2200	x1627
1659D	Reverse Sort Sum constructive algorithms, data structures, greedy, implementation, math, two pointers	1900	x4076
1659C	Line Empire binary search, brute force, dp, greedy, implementation, math	1500	x10854
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x11070
1659A	Red Versus Blue constructive algorithms, greedy, implementation, math	1000	x19609
1658F	Juju and Binary String brute force, constructive algorithms, greedy, math	2700	x780
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1072
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2602
1658D1	388535 (Easy Version) bitmasks, math	1600	x9216
1658C	Shinju and the Lost Permutation constructive algorithms, math	1700	x9449
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18713
1658A	Marin and Photoshoot constructive algorithms, implementation, math	800	x20409
1657F	Words on Tree 2-sat, dfs and similar, dsu, graphs, trees	2600	x585
1657E	Star MST combinatorics, dp, graph matchings, math	2200	x2159
1657D	For Gamers. By Gamers. binary search, brute force, greedy, math, sortings	2000	x4963
1657C	Bracket Sequence Deletion greedy, implementation	1200	x16940
1657B	XY Sequence greedy	800	x22957
1657A	Integer Moves brute force, math	800	x24110
1656I	Neighbour Ordering constructive algorithms, graphs	3500	x106
1656H	Equal LCM Subsets data structures, math, number theory	3200	x597
1656G	Cycle Palindrome constructive algorithms, graphs, math	3200	x390
1656F	Parametric MST binary search, constructive algorithms, graphs, greedy, math, sortings	2600	x1077
1656E	Equal Tree Sums constructive algorithms, dfs and similar, math, trees	2200	x3507
1656D	K-good constructive algorithms, math, number theory	1900	x6958
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x19451
1656B	Subtract Operation data structures, greedy, math, two pointers	1100	x19535
1656A	Good Pairs math, sortings	800	x19769
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x81
1654G	Snowy Mountain data structures, dfs and similar, graphs, greedy, shortest paths, trees	2900	x411
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1224
1654E	Arithmetic Operations brute force, data structures, graphs, math	2300	x2122
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2878
1654C	Alice and the Cake data structures, greedy, implementation, sortings	1400	x13642
1654B	Prefix Removals strings	800	x15679
1654A	Maximum Cake Tastiness brute force, greedy, implementation, sortings	800	x18740
1651F	Tower Defense binary search, brute force, data structures	3000	x383
1651E	Sum of Matchings brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math	2600	x526
1651D	Nearest Excluded Points binary search, data structures, dfs and similar, graphs, shortest paths	1900	x5256
1651C	Fault-tolerant Network brute force, data structures, implementation	1500	x10842
1651B	Prove Him Wrong constructive algorithms, greedy	800	x19741
1651A	Playoff implementation	800	x25811
1650G	Counting Shortcuts data structures, dfs and similar, dp, graphs, shortest paths	2100	x2538
1650F	Vitaly and Advanced Useless Algorithms dp, greedy, implementation	2200	x1504
1650E	Rescheduling the Exam binary search, data structures, greedy, implementation, math, sortings	1900	x4195
1650D	Twist the Permutation brute force, constructive algorithms, implementation, math	1300	x13156
1650C	Weight of the System of Nested Segments greedy, hashing, implementation, sortings	1200	x16917
1650B	DIV + MOD math	900	x28002
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x35093
1649B	Game of Ball Passing greedy, implementation	1300	x13180
1649A	Game implementation	800	x15624
1648F	Two Avenues data structures, dfs and similar, graphs	3500	x136
1648E	Air Reform data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees	3200	x419
1648D	Serious Business data structures, divide and conquer, dp, implementation, shortest paths	2800	x893
1648C	Tyler and Strings combinatorics, data structures, implementation	1900	x3011
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6540
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x13341
1647F	Madoka and Laziness dp, greedy	3100	x459
1647E	Madoka and the Sixth-graders data structures, dfs and similar, greedy	2500	x1004
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5351
1647C	Madoka and Childish Pranks constructive algorithms, greedy	1300	x12715
1647B	Madoka and the Elegant Gift brute force, constructive algorithms, graphs, implementation	1200	x15540
1647A	Madoka and Math Dad implementation, math	800	x22893
1646F	Playing Around the Table constructive algorithms, greedy, implementation	2900	x546
1646E	Power Board brute force, dp, math, number theory	2200	x2491
1646D	Weight the Tree constructive algorithms, dfs and similar, dp, implementation, trees	2000	x3861
1646C	Factorials and Powers of Two bitmasks, brute force, constructive algorithms, dp, math	1500	x14535
1646B	Quality vs Quantity brute force, constructive algorithms, greedy, sortings, two pointers	800	x21338
1646A	Square Counting math	800	x24427
1644F	Basis combinatorics, fft, math, number theory	2900	x330
1644E	Expand the Path brute force, combinatorics, data structures, implementation, math	1900	x3143
1644D	Cross Coloring data structures, implementation, math	1700	x7357
1644C	Increase Subarray Sums brute force, dp, greedy, implementation	1400	x13914
1644B	Anti-Fibonacci Permutation brute force, constructive algorithms, implementation	800	x20782
1644A	Doors and Keys implementation	800	x27518
1642B	Power Walking greedy	900	x17111