Problemset - Codeforces

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Educational Codeforces Round 175 (Rated for Div. 2)
23:34:31
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Problems

#	Name
1282A	Temporarily unavailable implementation, math	900	x15016
1281B	Azamon Web Services greedy	1600	x8439
1281A	Suffix Three implementation	800	x18138
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x67
1280E	Kirchhoff's Current Loss math	2900	x208
1280D	Miss Punyverse dp, greedy, trees	2500	x1044
1280C	Jeremy Bearimy dfs and similar, graphs, greedy, trees	2000	x2770
1280B	Beingawesomeism implementation, math	1800	x4071
1280A	Cut and Paste implementation, math	1700	x5549
1279F	New Year and Handle Change binary search, dp	2800	x943
1279E	New Year Permutations combinatorics, dp	2700	x391
1279D	Santa's Bot combinatorics, math, probabilities	1700	x6545
1279C	Stack of Presents data structures, implementation	1400	x11860
1279B	Verse For Santa binary search, brute force, implementation	1300	x13836
1279A	New Year Garland math	900	x17124
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1987
1278E	Tests for problem D constructive algorithms, dfs and similar, divide and conquer, trees	2200	x1947
1278D	Segment Tree data structures, dsu, graphs, trees	2100	x4098
1278C	Berry Jam data structures, dp, greedy, implementation	1700	x8175
1278B	A and B greedy, math	1500	x13523
1278A	Shuffle Hashing brute force, implementation, strings	1000	x17204
1277D	Let's Play the Words? data structures, hashing, implementation, math	1900	x3157
1277B	Make Them Odd greedy, number theory	1200	x15689
1277A	Happy Birthday, Polycarp! implementation	1000	x13535
1276F	Asterisk Substrings string suffix structures	3400	x369
1276E	Four Stones constructive algorithms	3500	x98
1276D	Tree Elimination dp, trees	2900	x621
1276C	Beautiful Rectangle brute force, combinatorics, constructive algorithms, data structures, greedy, math	2300	x1691
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x5153
1276A	As Simple as One and Two dp, greedy	1400	x12473
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		x422
1275C	#define Задача B ... *special problem		x669
1275B	Code Review *special problem		x823
1275A	Скрытый друг *special problem		x888
1272F	Two Bracket Sequences dp, strings, two pointers	2200	x2052
1272E	Nearest Opposite Parity dfs and similar, graphs, shortest paths	1900	x6616
1272D	Remove One Element brute force, dp	1500	x17153
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x27552
1272B	Snow Walking Robot constructive algorithms, greedy, implementation	1200	x14159
1272A	Three Friends brute force, greedy, math, sortings	900	x21092
1271F	Divide The Students brute force	2700	x206
1271E	Common Number binary search, combinatorics, dp, math	2100	x3507
1271D	Portals data structures, dp, greedy, implementation, sortings	2100	x3157
1271C	Shawarma Tent brute force, geometry, greedy, implementation	1300	x10669
1271B	Blocks greedy, math	1300	x11472
1271A	Suits brute force, greedy, math	800	x15098
1270I	Xor on Figures constructive algorithms, fft, math	3500	x249
1270H	Number of Components data structures	3300	x821
1270G	Subset with Zero Sum constructive algorithms, dfs and similar, graphs, math	2700	x2471
1270F	Awesome Substrings math, strings	2600	x1204
1270E	Divide Points constructive algorithms, geometry, math	2300	x2422
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x4721
1270C	Make Good bitmasks, constructive algorithms, math	1400	x14366
1270B	Interesting Subarray constructive algorithms, greedy, math	1200	x16594
1270A	Card Game games, greedy, math	800	x17173
1269B	Modulo Equality brute force, sortings	1500	x9305
1269A	Equation brute force, math	800	x22309
1268E	Happy Cactus dp	3400	x275
1268D	Invertation in Tournament brute force, divide and conquer, graphs, math	3200	x546
1268C	K Integers binary search, data structures	2300	x1780
1268B	Domino for Young dp, greedy, math	2000	x6053
1268A	Long Beautiful Integer constructive algorithms, greedy, implementation, strings	1700	x8745
1267L	Lexicography constructive algorithms, strings	1800	x3189
1267K	Key Storage combinatorics, math	2100	x2001
1267J	Just Arrange the Icons greedy, implementation, math	1800	x2923
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2600	x928
1267H	Help BerLine constructive algorithms	3200	x166
1267G	Game Relics math, probabilities	3000	x703
1267F	Foolprüf Security graphs	2600	x690
1267E	Elections greedy	1700	x3362
1267D	DevOps Best Practices constructive algorithms	2800	x233
1267C	Cactus Revenge constructive algorithms	3500	x384
1267B	Balls of Buma	900	x4158
1267A	Apprentice Learning Trajectory	2400	x1027
1266H	Red-Blue Graph dp, graphs, math, matrices, meet-in-the-middle	3400	x107
1266G	Permutation Concatenation string suffix structures	3300	x125
1266F	Almost Same Distance dfs and similar, graphs	2900	x353
1266E	Spaceship Solitaire data structures, greedy, implementation	2100	x2268
1266D	Decreasing Debts constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers	2000	x3681
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x9796
1266B	Dice Tower constructive algorithms, math	1000	x15620
1266A	Competitive Programmer chinese remainder theorem, math	1000	x16327
1265E	Beautiful Mirrors data structures, dp, math, probabilities	2100	x3872
1265B	Beautiful Numbers data structures, implementation, math, two pointers	1300	x12860
1265A	Beautiful String constructive algorithms, greedy	1000	x15402
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3500	x971
1264E	Beautiful League constructive algorithms, flows, graph matchings	2700	x830
1264D2	Beautiful Bracket Sequence (hard version) combinatorics, probabilities	2900	x1068
1264D1	Beautiful Bracket Sequence (easy version) combinatorics, dp, probabilities	2600	x1344
1264C	Beautiful Mirrors with queries data structures, probabilities	2400	x1215
1264B	Beautiful Sequence brute force, constructive algorithms, greedy	1900	x5884
1264A	Beautiful Regional Contest greedy, implementation	1500	x10217
1263F	Economic Difficulties data structures, dfs and similar, dp, flows, graphs, trees	2400	x904
1263E	Editor data structures, implementation	2100	x2826
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x14596
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13972