Problemset - Codeforces

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Codeforces Round (Div. 2)
3 days
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Problems

#	Name
1288F	Red-Blue Graph constructive algorithms, flows	2900	x514
1288E	Messenger Simulator data structures	2000	x3574
1288D	Minimax Problem binary search, bitmasks, dp	2000	x7171
1288C	Two Arrays combinatorics, dp	1600	x12880
1288B	Yet Another Meme Problem math	1100	x17051
1288A	Deadline binary search, brute force, math, ternary search	1100	x18282
1287B	Hyperset brute force, data structures, implementation	1500	x9443
1287A	Angry Students greedy, implementation	800	x20583
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	x648
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x1434
1286B	Numbers on Tree constructive algorithms, data structures, dfs and similar, graphs, greedy, trees	1800	x4708
1286A	Garland dp, greedy, sortings	1800	x8812
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	x7715
1285C	Fadi and LCM brute force, math, number theory	1400	x23474
1285B	Just Eat It! dp, greedy, implementation	1300	x22667
1285A	Mezo Playing Zoma math	800	x28081
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	x1302
1284D	New Year and Conference binary search, data structures, hashing, sortings	2100	x3156
1284C	New Year and Permutation combinatorics, math	1600	x8028
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10827
1284A	New Year and Naming implementation, strings	800	x18003
1283F	DIY Garland constructive algorithms, greedy, trees	2200	x1858
1283E	New Year Parties dp, greedy	1800	x6551
1283D	Christmas Trees graphs, greedy, shortest paths	1800	x7794
1283C	Friends and Gifts constructive algorithms, data structures, math	1500	x13138
1283B	Candies Division math	900	x21653
1283A	Minutes Before the New Year math	800	x49806
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	x10187
1282B1	K for the Price of One (Easy Version) dp, greedy, sortings	1400	x11487
1282A	Temporarily unavailable implementation, math	900	x14795
1281B	Azamon Web Services greedy	1600	x8294
1281A	Suffix Three implementation	800	x17946
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	x1008
1280C	Jeremy Bearimy dfs and similar, graphs, greedy, trees	2000	x2681
1280B	Beingawesomeism implementation, math	1800	x3938
1280A	Cut and Paste implementation, math	1700	x5407
1279F	New Year and Handle Change binary search, dp	2800	x887
1279E	New Year Permutations combinatorics, dp	2700	x376
1279D	Santa's Bot combinatorics, math, probabilities	1700	x6325
1279C	Stack of Presents data structures, implementation	1400	x11695
1279B	Verse For Santa binary search, brute force, implementation	1300	x13654
1279A	New Year Garland math	900	x16943
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1881
1278E	Tests for problem D constructive algorithms, dfs and similar, divide and conquer, trees	2200	x1918
1278D	Segment Tree data structures, dsu, graphs, trees	2100	x3985
1278C	Berry Jam data structures, dp, greedy, implementation	1700	x8039
1278B	A and B greedy, math	1500	x13294
1278A	Shuffle Hashing brute force, implementation, strings	1000	x16668
1277D	Let's Play the Words? data structures, hashing, implementation, math	1900	x3121
1277B	Make Them Odd greedy, number theory	1200	x15192
1277A	Happy Birthday, Polycarp! implementation	1000	x13352
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	x1663
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4958
1276A	As Simple as One and Two dp, greedy	1400	x12320
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	x1966
1272E	Nearest Opposite Parity dfs and similar, graphs, shortest paths	1900	x6312
1272D	Remove One Element brute force, dp	1500	x16570
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x26530
1272B	Snow Walking Robot constructive algorithms, greedy, implementation	1200	x13899
1272A	Three Friends brute force, greedy, math, sortings	900	x20690
1271F	Divide The Students brute force	2700	x192
1271E	Common Number binary search, combinatorics, dp, math	2100	x3398
1271D	Portals data structures, dp, greedy, implementation, sortings	2100	x3051
1271C	Shawarma Tent brute force, geometry, greedy, implementation	1300	x10567
1271B	Blocks greedy, math	1300	x11343
1271A	Suits brute force, greedy, math	800	x14970
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	x1137
1270E	Divide Points constructive algorithms, geometry, math	2300	x2379
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x4681
1270C	Make Good bitmasks, constructive algorithms, math	1400	x14093
1270B	Interesting Subarray constructive algorithms, greedy, math	1200	x16376
1270A	Card Game games, greedy, math	800	x16969
1269B	Modulo Equality brute force, sortings	1500	x9162
1269A	Equation brute force, math	800	x21613