Problemset - Codeforces

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Codeforces Round 978 (Div. 2)
6 days

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Problems

#	Name
1291B	Array Sharpening greedy, implementation	1300	x14175
1291A	Even But Not Even greedy, math, strings	900	x19565
1290F	Making Shapes dp	3500	x380
1290E	Cartesian Tree data structures	3300	x549
1290D	Coffee Varieties (hard version) constructive algorithms, graphs, interactive	3000	x828
1290C	Prefix Enlightenment dfs and similar, dsu, graphs	2400	x1733
1290B	Irreducible Anagrams binary search, constructive algorithms, data structures, strings, two pointers	1800	x5442
1290A	Mind Control brute force, data structures, implementation	1600	x8569
1288F	Red-Blue Graph constructive algorithms, flows	2900	x515
1288E	Messenger Simulator data structures	2000	x3589
1288D	Minimax Problem binary search, bitmasks, dp	2000	x7190
1288C	Two Arrays combinatorics, dp	1600	x12902
1288B	Yet Another Meme Problem math	1100	x17058
1288A	Deadline binary search, brute force, math, ternary search	1100	x18296
1287B	Hyperset brute force, data structures, implementation	1500	x9443
1287A	Angry Students greedy, implementation	800	x20602
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	x593
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2800	x649
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x1436
1286B	Numbers on Tree constructive algorithms, data structures, dfs and similar, graphs, greedy, trees	1800	x4712
1286A	Garland dp, greedy, sortings	1800	x8818
1285F	Classical? binary search, combinatorics, number theory	2900	x1149
1285E	Delete a Segment brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers	2300	x1838
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x7726
1285C	Fadi and LCM brute force, math, number theory	1400	x23511
1285B	Just Eat It! dp, greedy, implementation	1300	x22726
1285A	Mezo Playing Zoma math	800	x28092
1284G	Seollal graphs	3300	x174
1284F	New Year and Social Network data structures, graph matchings, graphs, math, trees	3200	x323
1284E	New Year and Castle Construction combinatorics, geometry, math, sortings	2500	x1302
1284D	New Year and Conference binary search, data structures, hashing, sortings	2100	x3161
1284C	New Year and Permutation combinatorics, math	1600	x8037
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10835
1284A	New Year and Naming implementation, strings	800	x18010
1283F	DIY Garland constructive algorithms, greedy, trees	2200	x1858
1283E	New Year Parties dp, greedy	1800	x6552
1283D	Christmas Trees graphs, greedy, shortest paths	1800	x7798
1283C	Friends and Gifts constructive algorithms, data structures, math	1500	x13149
1283B	Candies Division math	900	x21670
1283A	Minutes Before the New Year math	800	x49949
1282E	The Cake Is a Lie constructive algorithms, data structures, dfs and similar, graphs	2400	x1146
1282D	Enchanted Artifact constructive algorithms, interactive, strings	2300	x2238
1282C	Petya and Exam greedy, sortings, two pointers	1800	x4312
1282B2	K for the Price of One (Hard Version) dp, greedy, sortings	1600	x10193
1282B1	K for the Price of One (Easy Version) dp, greedy, sortings	1400	x11491
1282A	Temporarily unavailable implementation, math	900	x14795
1281B	Azamon Web Services greedy	1600	x8296
1281A	Suffix Three implementation	800	x17950
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x62
1280E	Kirchhoff's Current Loss math	2900	x202
1280D	Miss Punyverse dp, greedy, trees	2500	x1010
1280C	Jeremy Bearimy dfs and similar, graphs, greedy, trees	2000	x2682
1280B	Beingawesomeism implementation, math	1800	x3943
1280A	Cut and Paste implementation, math	1700	x5409
1279F	New Year and Handle Change binary search, dp	2800	x887
1279E	New Year Permutations combinatorics, dp	2700	x377
1279D	Santa's Bot combinatorics, math, probabilities	1700	x6339
1279C	Stack of Presents data structures, implementation	1400	x11700
1279B	Verse For Santa binary search, brute force, implementation	1300	x13663
1279A	New Year Garland math	900	x16947
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1886
1278E	Tests for problem D constructive algorithms, dfs and similar, divide and conquer, trees	2200	x1919
1278D	Segment Tree data structures, dsu, graphs, trees	2100	x3997
1278C	Berry Jam data structures, dp, greedy, implementation	1700	x8049
1278B	A and B greedy, math	1500	x13309
1278A	Shuffle Hashing brute force, implementation, strings	1000	x16697
1277D	Let's Play the Words? data structures, hashing, implementation, math	1900	x3124
1277B	Make Them Odd greedy, number theory	1200	x15202
1277A	Happy Birthday, Polycarp! implementation	1000	x13383
1276F	Asterisk Substrings string suffix structures	3400	x341
1276E	Four Stones constructive algorithms	3500	x90
1276D	Tree Elimination dp, trees	2900	x558
1276C	Beautiful Rectangle brute force, combinatorics, constructive algorithms, data structures, greedy, math	2300	x1664
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4967
1276A	As Simple as One and Two dp, greedy	1400	x12327
1275F	Шардирование постов *special problem, binary search, interactive		x92
1275E3	Контрольная сумма *special problem		x56
1275E2	Контрольная сумма *special problem		x130
1275E1	Контрольная сумма *special problem		x254
1275D	Storage2 *special problem		x421
1275C	#define Задача B ... *special problem		x669
1275B	Code Review *special problem		x821
1275A	Скрытый друг *special problem		x887
1272F	Two Bracket Sequences dp, strings, two pointers	2200	x1970
1272E	Nearest Opposite Parity dfs and similar, graphs, shortest paths	1900	x6318
1272D	Remove One Element brute force, dp	1500	x16596
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x26558
1272B	Snow Walking Robot constructive algorithms, greedy, implementation	1200	x13903
1272A	Three Friends brute force, greedy, math, sortings	900	x20698
1271F	Divide The Students brute force	2700	x192
1271E	Common Number binary search, combinatorics, dp, math	2100	x3401
1271D	Portals data structures, dp, greedy, implementation, sortings	2100	x3054
1271C	Shawarma Tent brute force, geometry, greedy, implementation	1300	x10568
1271B	Blocks greedy, math	1300	x11348
1271A	Suits brute force, greedy, math	800	x14971
1270I	Xor on Figures constructive algorithms, fft, math	3500	x238
1270H	Number of Components data structures	3300	x731
1270G	Subset with Zero Sum constructive algorithms, dfs and similar, graphs, math	2700	x2236