Problemset - Codeforces

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Codeforces Round 977 (Div. 2)
2 days
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Problems

#	Name
1407A	Ahahahahahahahaha constructive algorithms, math	1100	x20438
1406B	Maximum Product brute force, dp, greedy, implementation, sortings	1200	x22632
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x24283
1401B	Ternary Sequence constructive algorithms, greedy, math	1100	x21075
1399C	Boats Competition brute force, greedy, two pointers	1200	x28855
1395B	Boboniu Plays Chess constructive algorithms	1100	x16058
1392C	Omkar and Waterslide greedy, implementation	1200	x18785
1385C	Make It Good greedy	1200	x26979
1384A	Common Prefixes constructive algorithms, greedy, strings	1200	x18789
1382B	Sequential Nim dp, games	1100	x24665
1381A1	Prefix Flip (Easy Version) constructive algorithms, data structures, strings	1300	x20493
1375B	Neighbor Grid constructive algorithms, greedy	1200	x17277
1375A	Sign Flipping constructive algorithms, math	1100	x18346
1373C	Pluses and Minuses math	1300	x18357
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x28015
1371C	A Cookie for You greedy, implementation, math	1300	x20536
1371B	Magical Calendar math	1200	x19171
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23679
1369B	AccurateLee greedy, implementation, strings	1200	x24408
1367C	Social Distance constructive algorithms, greedy, math	1300	x23489
1366B	Shuffle math, two pointers	1300	x21019
1366A	Shovels and Swords binary search, greedy, math	1100	x30086
1365B	Trouble Sort constructive algorithms, implementation	1300	x26853
1365A	Matrix Game games, greedy, implementation	1100	x24095
1364B	Most socially-distanced subsequence greedy, two pointers	1300	x19868
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x28060
1363A	Odd Selection brute force, implementation, math	1200	x35903
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x19178
1360E	Polygon dp, graphs, implementation, shortest paths	1300	x25296
1360D	Buying Shovels math, number theory	1300	x33164
1360C	Similar Pairs constructive algorithms, graph matchings, greedy, sortings	1100	x32851
1355B	Young Explorers dp, greedy, sortings	1200	x25675
1355A	Sequence with Digits brute force, implementation, math	1200	x26575
1354B	Ternary String binary search, dp, implementation, two pointers	1200	x30908
1352D	Alice, Bob and Candies implementation	1300	x26179
1352C	K-th Not Divisible by n binary search, math	1200	x54473
1352B	Same Parity Summands constructive algorithms, math	1200	x37620
1345B	Card Constructions binary search, brute force, dp, math	1100	x26427
1343C	Alternating Subsequence dp, greedy, two pointers	1200	x38370
1342B	Binary Period constructive algorithms, strings	1100	x23690
1341B	Nastya and Door greedy, implementation	1300	x19672
1339B	Sorted Adjacent Differences constructive algorithms, sortings	1200	x26388
1335D	Anti-Sudoku constructive algorithms, implementation	1300	x27420
1335C	Two Teams Composing binary search, greedy, implementation, sortings	1100	x34620
1334B	Middle Class greedy, sortings	1100	x25856
1334A	Level Statistics implementation, math	1200	x23269
1333B	Kind Anton greedy, implementation	1100	x21602
1332A	Exercising Walk greedy, implementation, math	1100	x19412
1328C	Ternary XOR greedy, implementation	1200	x30466
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x29089
1327B	Princesses and Princes brute force, graphs, greedy	1200	x18702
1327A	Sum of Odd Integers math	1100	x38904
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15629
1324C	Frog Jumps binary search, data structures, dfs and similar, greedy, implementation	1100	x27942
1324B	Yet Another Palindrome Problem brute force, strings	1100	x28468
1322A	Unusual Competitions greedy	1300	x12432
1315C	Restoring Permutation greedy	1200	x10088
1315B	Homecoming binary search, dp, greedy, strings	1300	x9195
1311C	Perform the Combo brute force	1300	x16020
1311B	WeirdSort dfs and similar, sortings	1200	x18890
1307B	Cow and Friend geometry, greedy, math	1300	x13254
1305B	Kuroni and Simple Strings constructive algorithms, greedy, strings, two pointers	1200	x11751
1304B	Longest Palindrome brute force, constructive algorithms, greedy, implementation, strings	1100	x17871
1294C	Product of Three Numbers greedy, math, number theory	1300	x34763
1294B	Collecting Packages implementation, sortings	1200	x21814
1293A	ConneR and the A.R.C. Markland-N binary search, brute force, implementation	1100	x15410
1291B	Array Sharpening greedy, implementation	1300	x14171
1288B	Yet Another Meme Problem math	1100	x17053
1288A	Deadline binary search, brute force, math, ternary search	1100	x18283
1285B	Just Eat It! dp, greedy, implementation	1300	x22679
1279B	Verse For Santa binary search, brute force, implementation	1300	x13656
1277B	Make Them Odd greedy, number theory	1200	x15193
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x26534
1272B	Snow Walking Robot constructive algorithms, greedy, implementation	1200	x13902
1271C	Shawarma Tent brute force, geometry, greedy, implementation	1300	x10568
1271B	Blocks greedy, math	1300	x11343
1270B	Interesting Subarray constructive algorithms, greedy, math	1200	x16377
1265B	Beautiful Numbers data structures, implementation, math, two pointers	1300	x12580
1263A	Sweet Problem math	1100	x16328
1260B	Obtain Two Zeroes binary search, math	1300	x15741
1257C	Dominated Subarray greedy, implementation, sortings, strings, two pointers	1200	x15955
1255B	Fridge Lockers graphs, implementation	1100	x11955
1249C1	Good Numbers (easy version) brute force, greedy, implementation	1300	x15520
1249B2	Books Exchange (hard version) dfs and similar, dsu, math	1300	x16779
1245B	Restricted RPS constructive algorithms, dp, greedy	1200	x13801
1238B	Kill `Em All greedy, sortings	1300	x13614
1237B	Balanced Tunnel data structures, sortings, two pointers	1300	x16036
1236C	Labs constructive algorithms, greedy, implementation	1300	x10158
1234B2	Social Network (hard version) data structures, implementation	1300	x16903
1231C	Increasing Matrix greedy	1100	x3848
1227B	Box constructive algorithms	1200	x9653
1227A	Math Problem math	1100	x9819
1225B2	TV Subscriptions (Hard Version) implementation, two pointers	1300	x10601
1221C	Perfect Team binary search, math	1200	x21052
1221B	Knights constructive algorithms, greedy	1100	x11956
1220C	Substring Game in the Lesson games, greedy, strings	1300	x10206
1220B	Multiplication Table math, number theory	1300	x11604
1217A	Creating a Character binary search, math	1300	x15004
1216D	Swords math	1300	x11138
1214C	Bad Sequence data structures, greedy	1200	x13262