Problemset - Codeforces

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Codeforces Round 978 (Div. 2)
6 days

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Problems

#	Name
1251C	Minimize The Integer greedy, two pointers	1600	x12427
1251B	Binary Palindromes greedy, strings	1400	x11016
1251A	Broken Keyboard brute force, strings, two pointers	1000	x19620
1250N	Wires dfs and similar, graphs, greedy	2000	x1585
1250M	SmartGarden constructive algorithms, divide and conquer	2500	x360
1250L	Divide The Students binary search, greedy, math	1500	x4100
1250K	Projectors flows, graphs	3100	x203
1250J	The Parade binary search, greedy	1800	x2941
1250I	Show Must Go On binary search, brute force, greedy, shortest paths	3100	x134
1250H	Happy Birthday math	1500	x4053
1250G	Discarding Game dp, greedy, two pointers	2300	x721
1250F	Data Center brute force, implementation	800	x7288
1250E	The Coronation graphs, implementation	2300	x815
1250D	Conference Problem dp	3000	x176
1250C	Trip to Saint Petersburg data structures	2100	x1313
1250B	The Feast and the Bus brute force, constructive algorithms, greedy, math	1800	x2610
1250A	Berstagram implementation	1400	x4080
1249F	Maximum Weight Subset dp, trees	2200	x2385
1249E	By Elevator or Stairs? dp, shortest paths	1700	x9697
1249D2	Too Many Segments (hard version) data structures, greedy, sortings	1800	x5245
1249D1	Too Many Segments (easy version) greedy	1800	x5113
1249C2	Good Numbers (hard version) binary search, greedy, math, meet-in-the-middle	1500	x12629
1249C1	Good Numbers (easy version) brute force, greedy, implementation	1300	x15534
1249B2	Books Exchange (hard version) dfs and similar, dsu, math	1300	x16799
1249B1	Books Exchange (easy version) dsu, math	1000	x20690
1249A	Yet Another Dividing into Teams math	800	x22269
1248D1	The World Is Just a Programming Task (Easy Version) brute force, dp, greedy, implementation	2000	x2388
1248B	Grow The Tree greedy, math, sortings	900	x16887
1248A	Integer Points geometry, math	1000	x14123
1246F	Cursor Distance	3500	x168
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x2003
1245E	Hyakugoku and Ladders dp, probabilities, shortest paths	2300	x1272
1245D	Shichikuji and Power Grid dsu, graphs, greedy, shortest paths, trees	1900	x7565
1245C	Constanze's Machine dp	1400	x17539
1245B	Restricted RPS constructive algorithms, dp, greedy	1200	x13807
1245A	Good ol' Numbers Coloring math, number theory	1000	x14216
1244G	Running in Pairs constructive algorithms, greedy, math	2400	x1353
1244F	Chips constructive algorithms, implementation	2300	x1539
1244E	Minimizing Difference binary search, constructive algorithms, greedy, sortings, ternary search, two pointers	2000	x5130
1244D	Paint the Tree brute force, constructive algorithms, dp, graphs, implementation, trees	1800	x7573
1244C	The Football Season brute force, math, number theory	2000	x7616
1244B	Rooms and Staircases brute force, implementation	1000	x15802
1244A	Pens and Pencils math	800	x19223
1243B2	Character Swap (Hard Version) strings	1600	x7093
1243B1	Character Swap (Easy Version) strings	1000	x14850
1243A	Maximum Square implementation	800	x15652
1242E	Planar Perimeter constructive algorithms, graphs	3200	x130
1242D	Number Discovery math	3400	x199
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x1668
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x7521
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12605
1240F	Football graphs	3100	x249
1239F	Swiper, no swiping! graphs, implementation	3400	x266
1239E	Turtle dp, implementation	3100	x942
1239D	Catowice City 2-sat, dfs and similar, graph matchings, graphs	2400	x2021
1239C	Queue in the Train data structures, greedy, implementation	2300	x1354
1239B	The World Is Just a Programming Task (Hard Version) implementation	2500	x1049
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x7367
1238G	Adilbek and the Watering System data structures, greedy, sortings	2700	x410
1238F	The Maximum Subtree dfs and similar, dp, graphs, trees	2200	x1877
1238E	Keyboard Purchase bitmasks, dp	2200	x2985
1238D	AB-string binary search, combinatorics, dp, strings	1900	x6004
1238C	Standard Free2play dp, greedy, math	1600	x7423
1238B	Kill `Em All greedy, sortings	1300	x13636
1238A	Prime Subtraction math, number theory	900	x24333
1237H	Balanced Reversals constructive algorithms	3300	x371
1237G	Balanced Distribution data structures, dp, greedy	3500	x123
1237F	Balanced Domino Placements combinatorics, dp	2600	x886
1237E	Balanced Binary Search Trees dp, math	2400	x1326
1237D	Balanced Playlist binary search, data structures, implementation	2000	x4198
1237C2	Balanced Removals (Harder) binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings	1900	x4334
1237C1	Balanced Removals (Easier) constructive algorithms, geometry, greedy	1700	x6086
1237B	Balanced Tunnel data structures, sortings, two pointers	1300	x16070
1237A	Balanced Rating Changes implementation, math	1000	x19861
1236F	Alice and the Cactus dfs and similar, graphs, math, probabilities	3000	x177
1236E	Alice and the Unfair Game binary search, data structures, dp, dsu	2500	x659
1236D	Alice and the Doll brute force, data structures, greedy, implementation	2300	x1672
1236C	Labs constructive algorithms, greedy, implementation	1300	x10159
1236B	Alice and the List of Presents combinatorics, math	1500	x11065
1236A	Stones brute force, greedy, math	800	x16298
1234F	Yet Another Substring Reverse bitmasks, dp	2200	x2589
1234E	Special Permutations math	2000	x2786
1234D	Distinct Characters Queries data structures	1600	x15039
1234C	Pipes dp, implementation	1500	x12612
1234B2	Social Network (hard version) data structures, implementation	1300	x16908
1234B1	Social Network (easy version) implementation	1000	x18748
1234A	Equalize Prices Again math	800	x27825
1231E	Middle-Out constructive algorithms, greedy, strings	2200	x838
1231C	Increasing Matrix greedy	1100	x3850
1230B	Ania and Minimizing greedy, implementation	1000	x18709
1230A	Dawid and Bags of Candies brute force, implementation	800	x21530
1228F	One Node is Gone constructive algorithms, implementation, trees	2500	x437
1228E	Another Filling the Grid combinatorics, dp, math	2300	x2739
1228D	Complete Tripartite brute force, constructive algorithms, graphs, hashing, implementation	1900	x5212
1228C	Primes and Multiplication math, number theory	1700	x9030
1228B	Filling the Grid implementation, math	1400	x11514
1228A	Distinct Digits brute force, implementation	800	x21673
1227G	Not Same constructive algorithms	2600	x1033
1227F2	Wrong Answer on test 233 (Hard Version) combinatorics, math	2400	x1508
1227F1	Wrong Answer on test 233 (Easy Version) dp	2200	x1811