Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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Problems

#	Name
86A	Reflection math	1600	x1337
327E	Axis Walking bitmasks, combinatorics, constructive algorithms, dp, meet-in-the-middle	2300	x1336
1726E	Almost Perfect combinatorics, fft, math	2400	x1335
1746E1	Joking (Easy Version) binary search, constructive algorithms, interactive, ternary search	2500	x1333
1687C	Sanae and Giant Robot binary search, brute force, data structures, dsu, greedy, sortings	2500	x1333
266C	Below the Diagonal constructive algorithms, greedy, math	2100	x1333
331A1	Oh Sweet Beaverette brute force, implementation	1400	x1332
993E	Nikita and Order Statistics chinese remainder theorem, fft, math	2300	x1331
1488A	From Zero To Y *special problem, math	900	x1330
303B	Rectangle Puzzle II implementation, math	1700	x1329
1467E	Distinctive Roots in a Tree data structures, dfs and similar, dp, trees	2500	x1328
67D	Optical Experiment binary search, data structures, dp	1900	x1328
965E	Short Code data structures, dp, greedy, strings, trees	2200	x1324
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1323
220E	Little Elephant and Inversions data structures, two pointers	2400	x1323
1156F	Card Bag dp, math, probabilities	2300	x1320
505E	Mr. Kitayuta vs. Bamboos binary search, greedy	2900	x1320
405E	Graph Cutting dfs and similar, graphs	2300	x1320
573E	Bear and Bowling data structures, greedy	3200	x1319
109B	Lucky Probability brute force, probabilities	1900	x1319
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1318
216D	Spider's Web binary search, sortings, two pointers	1700	x1318
65B	Harry Potter and the History of Magic brute force, greedy, implementation	1700	x1318
605E	Intergalaxy Trips probabilities, shortest paths	2700	x1313
135C	Zero-One constructive algorithms, games, greedy	1900	x1313
1039C	Network Safety dfs and similar, dsu, graphs, math, sortings	2200	x1311
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1310
643C	Levels and Regions dp	2400	x1309
461C	Appleman and a Sheet of Paper data structures, implementation	2200	x1308
1769B1	Копирование файлов I *special problem, brute force, implementation, math	1000	x1307
260D	Black and White Tree constructive algorithms, dsu, graphs, greedy, trees	2100	x1307
746G	New Roads constructive algorithms, graphs, trees	2100	x1306
1864F	Exotic Queries data structures, implementation, sortings	2300	x1305
1239C	Queue in the Train data structures, greedy, implementation	2300	x1304
576D	Flights for Regular Customers dp, matrices	2700	x1302
87C	Interesting Game dp, games, math	2000	x1301
618F	Double Knapsack constructive algorithms, two pointers	3000	x1299
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1297
1387B1	Village (Minimum) *special problem, dp, greedy, trees	2100	x1296
1385G	Columns Swaps 2-sat, dfs and similar, dsu, graphs, implementation	2300	x1296
73A	The Elder Trolls IV: Oblivon greedy, math	1600	x1296
21B	Intersection implementation, math	2000	x1296
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1295
825F	String Compression dp, hashing, string suffix structures, strings	2400	x1295
187C	Weak Memory dfs and similar, dsu	2000	x1295
1470C	Strange Shuffle binary search, brute force, constructive algorithms, interactive	2500	x1294
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1293
1860E	Fast Travel Text Editor data structures, dfs and similar, graphs, shortest paths	2400	x1289
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1289
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1289
626E	Simple Skewness binary search, math, ternary search	2400	x1289
106D	Treasure Island brute force, implementation	1700	x1289
1474E	What Is It? constructive algorithms, greedy	2500	x1288
803G	Periodic RMQ Problem data structures	2300	x1288
1666J	Job Lookup constructive algorithms, dp, shortest paths, trees	2100	x1287
175C	Geometry Horse greedy, implementation, sortings, two pointers	1600	x1287
666E	Forensic Examination data structures, string suffix structures	3100	x1286
201C	Fragile Bridges dp	2000	x1286
309C	Memory for Arrays binary search, bitmasks, greedy	1900	x1285
873F	Forbidden Indices dsu, string suffix structures, strings	2400	x1284
601C	Kleofáš and the n-thlon dp, math, probabilities	2300	x1284
762D	Maximum path dp, greedy, implementation	2300	x1283
1250C	Trip to Saint Petersburg data structures	2100	x1282
961G	Partitions combinatorics, math, number theory	2700	x1282
286C	Main Sequence greedy, implementation	2100	x1282
1912D	Divisibility Test math	1900	x1280
925C	Big Secret constructive algorithms, math	2200	x1279
818F	Level Generation binary search, math, ternary search	2100	x1279
425B	Sereja and Table bitmasks, greedy	2200	x1279
1310D	Tourism dp, graphs, probabilities	2300	x1277
908G	New Year and Original Order dp, math	2800	x1277
464E	The Classic Problem data structures, graphs, shortest paths	3000	x1277
1363F	Rotating Substrings dp, strings	2600	x1275
802A	Heidi and Library (easy) greedy	1800	x1275
734F	Anton and School bitmasks, constructive algorithms, implementation, math	2500	x1275
756C	Nikita and stack data structures	2200	x1274
1304F2	Animal Observation (hard version) data structures, dp, greedy	2400	x1273
762E	Radio stations binary search, data structures	2200	x1273
698C	LRU bitmasks, dp, math, probabilities	2400	x1272
139B	Wallpaper implementation, math	1600	x1270
366D	Dima and Trap Graph binary search, data structures, dfs and similar, dsu, shortest paths, two pointers	2000	x1269
291E	Tree-String Problem *special problem, dfs and similar, hashing, strings	2000	x1267
1065D	Three Pieces dfs and similar, dp, shortest paths	2200	x1266
121C	Lucky Permutation brute force, combinatorics, number theory	1900	x1266
1906E	Merge Not Sort constructive algorithms, dp	1900	x1265
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1265
757D	Felicity's Big Secret Revealed bitmasks, dp	2200	x1265
1450F	The Struggling Contestant constructive algorithms, greedy	2400	x1263
1109D	Sasha and Interesting Fact from Graph Theory brute force, combinatorics, dp, math, trees	2400	x1263
852G	Bathroom terminal implementation	1700	x1263
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1263
1793F	Rebrending brute force, data structures, divide and conquer, implementation	2600	x1262
992E	Nastya and King-Shamans binary search, data structures	2500	x1262
293E	Close Vertices data structures, divide and conquer, trees	2700	x1262
62B	Tyndex.Brome binary search, implementation	1800	x1262
238B	Boring Partition constructive algorithms	1800	x1261
1244G	Running in Pairs constructive algorithms, greedy, math	2400	x1260
457A	Golden System math, meet-in-the-middle	1700	x1260
1772G	Gaining Rating binary search, greedy, implementation, math, sortings, two pointers	2200	x1259
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x1259