Problemset - Codeforces

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Problems

#	Name
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3500	x310
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x335
1292D	Chaotic V. dp, graphs, greedy, math, number theory, trees	2700	x811
1292C	Xenon's Attack on the Gangs combinatorics, dfs and similar, dp, greedy, trees	2300	x2062
1292B	Aroma's Search brute force, constructive algorithms, geometry, greedy, implementation	1700	x6353
1292A	NEKO's Maze Game data structures, dsu, implementation	1400	x13341
1291F	Coffee Varieties (easy version) graphs, interactive	2800	x661
1290F	Making Shapes dp	3500	x379
1290E	Cartesian Tree data structures	3300	x544
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x827
1290C	Prefix Enlightenment dfs and similar, dsu, graphs	2400	x1733
1290B	Irreducible Anagrams binary search, constructive algorithms, data structures, strings, two pointers	1800	x5432
1290A	Mind Control brute force, data structures, implementation	1600	x8567
1288F	Red-Blue Graph constructive algorithms, flows	2900	x514
1288E	Messenger Simulator data structures	2000	x3570
1288D	Minimax Problem binary search, bitmasks, dp	2000	x7166
1288C	Two Arrays combinatorics, dp	1600	x12872
1287B	Hyperset brute force, data structures, implementation	1500	x9440
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x244
1286E	Fedya the Potter Strikes Back data structures, strings	3200	x518
1286D	LCC data structures, math, matrices, probabilities	3100	x592
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2800	x646
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x1432
1286B	Numbers on Tree constructive algorithms, data structures, dfs and similar, graphs, greedy, trees	1800	x4700
1286A	Garland dp, greedy, sortings	1800	x8804
1285F	Classical? binary search, combinatorics, number theory	2900	x1146
1285E	Delete a Segment brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers	2300	x1834
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7713
1285C	Fadi and LCM brute force, math, number theory	1400	x23443
1284G	Seollal graphs	3300	x173
1284F	New Year and Social Network data structures, graph matchings, graphs, math, trees	3200	x317
1284E	New Year and Castle Construction combinatorics, geometry, math, sortings	2500	x1301
1284D	New Year and Conference binary search, data structures, hashing, sortings	2100	x3156
1284C	New Year and Permutation combinatorics, math	1600	x8020
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10824
1283F	DIY Garland constructive algorithms, greedy, trees	2200	x1855
1283E	New Year Parties dp, greedy	1800	x6545
1283D	Christmas Trees graphs, greedy, shortest paths	1800	x7782
1283C	Friends and Gifts constructive algorithms, data structures, math	1500	x13130
1282E	The Cake Is a Lie constructive algorithms, data structures, dfs and similar, graphs	2400	x1146
1282D	Enchanted Artifact constructive algorithms, interactive, strings	2300	x2237
1282C	Petya and Exam greedy, sortings, two pointers	1800	x4310
1282B2	K for the Price of One (Hard Version) dp, greedy, sortings	1600	x10186
1282B1	K for the Price of One (Easy Version) dp, greedy, sortings	1400	x11484
1281B	Azamon Web Services greedy	1600	x8290
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x62
1280E	Kirchhoff's Current Loss math	2900	x201
1280D	Miss Punyverse dp, greedy, trees	2500	x1007
1280C	Jeremy Bearimy dfs and similar, graphs, greedy, trees	2000	x2680
1280B	Beingawesomeism implementation, math	1800	x3936
1280A	Cut and Paste implementation, math	1700	x5406
1279F	New Year and Handle Change binary search, dp	2800	x886
1279E	New Year Permutations combinatorics, dp	2700	x376
1279D	Santa's Bot combinatorics, math, probabilities	1700	x6320
1279C	Stack of Presents data structures, implementation	1400	x11694
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1877
1278E	Tests for problem D constructive algorithms, dfs and similar, divide and conquer, trees	2200	x1917
1278D	Segment Tree data structures, dsu, graphs, trees	2100	x3982
1278C	Berry Jam data structures, dp, greedy, implementation	1700	x8036
1278B	A and B greedy, math	1500	x13288
1277D	Let's Play the Words? data structures, hashing, implementation, math	1900	x3120
1276F	Asterisk Substrings string suffix structures	3400	x341
1276E	Four Stones constructive algorithms	3500	x90
1276D	Tree Elimination dp, trees	2900	x557
1276C	Beautiful Rectangle brute force, combinatorics, constructive algorithms, data structures, greedy, math	2300	x1660
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4954
1276A	As Simple as One and Two dp, greedy	1400	x12314
1272F	Two Bracket Sequences dp, strings, two pointers	2200	x1961
1272E	Nearest Opposite Parity dfs and similar, graphs, shortest paths	1900	x6310
1272D	Remove One Element brute force, dp	1500	x16562
1271F	Divide The Students brute force	2700	x192
1271E	Common Number binary search, combinatorics, dp, math	2100	x3396
1271D	Portals data structures, dp, greedy, implementation, sortings	2100	x3047
1270I	Xor on Figures constructive algorithms, fft, math	3500	x238
1270H	Number of Components data structures	3300	x730
1270G	Subset with Zero Sum constructive algorithms, dfs and similar, graphs, math	2700	x2231
1270F	Awesome Substrings math, strings	2600	x1136
1270E	Divide Points constructive algorithms, geometry, math	2300	x2378
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x4681
1270C	Make Good bitmasks, constructive algorithms, math	1400	x14087
1269B	Modulo Equality brute force, sortings	1500	x9157
1268E	Happy Cactus dp	3400	x251
1268D	Invertation in Tournament brute force, divide and conquer, graphs, math	3200	x505
1268C	K Integers binary search, data structures	2300	x1719
1268B	Domino for Young dp, greedy, math	2000	x5916
1268A	Long Beautiful Integer constructive algorithms, greedy, implementation, strings	1700	x8625
1267L	Lexicography constructive algorithms, strings	1800	x3043
1267K	Key Storage combinatorics, math	2100	x1911
1267J	Just Arrange the Icons greedy, implementation, math	1800	x2812
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x885
1267H	Help BerLine constructive algorithms	3200	x150
1267G	Game Relics math, probabilities	3000	x653
1267F	Foolprüf Security graphs	2600	x662
1267E	Elections greedy	1700	x3236
1267D	DevOps Best Practices constructive algorithms	2800	x217
1267C	Cactus Revenge constructive algorithms	3500	x383
1267A	Apprentice Learning Trajectory	2400	x986
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x104
1266G	Permutation Concatenation string suffix structures	3300	x122
1266F	Almost Same Distance dfs and similar, graphs	2900	x340