Problemset - Codeforces

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Codeforces Round 973 (Div. 2)
10:32:20
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combinatorics

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Problems

#	Name
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x131
1475E	Advertising Agency combinatorics, math, sortings	1600	x13562
1475C	Ball in Berland combinatorics, graphs, math	1400	x21059
1473G	Tiles combinatorics, dp, fft, math	2800	x391
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x298
1467D	Sum of Paths combinatorics, dp, math	2200	x3666
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x272
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x920
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9659
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13700
1454E	Number of Simple Paths combinatorics, dfs and similar, graphs, trees	2000	x5783
1452D	Radio Towers combinatorics, dp, math	1600	x7961
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x217
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x433
1444B	Divide and Sum combinatorics, math, sortings	1900	x6287
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4472
1439D	INOI Final Contests combinatorics, dp, fft	3100	x368
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1226
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x524
1436C	Binary Search binary search, combinatorics	1500	x10786
1433E	Two Round Dances combinatorics, math	1300	x18410
1426F	Number of Subsequences combinatorics, dp, strings	2000	x5325
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x829
1422C	Bargain combinatorics, dp, math	1700	x8212
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x7557
1418E	Expected Damage binary search, combinatorics, probabilities	2400	x1847
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x1032
1403C	Chess Rush *special problem, combinatorics, dp, implementation, math	3200	x51
1402C	Star Trek *special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees	2600	x203
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x956
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x10231
1392H	ZS Shuffles Cards combinatorics, dp, math, probabilities	3000	x704
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14988
1383E	Strange Operation combinatorics, data structures, dp	2800	x780
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2339
1371E1	Asterism (Easy Version) binary search, brute force, combinatorics, math, number theory, sortings	1900	x5224
1366E	Two Arrays binary search, brute force, combinatorics, constructive algorithms, dp, two pointers	2100	x4262
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x1159
1359E	Modular Stability combinatorics, math, number theory	2000	x6099
1342E	Placing Rooks combinatorics, fft, math	2300	x3072
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x304
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x685
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2819
1332E	Height All the Same combinatorics, constructive algorithms, math, matrices	2100	x3832
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6680
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x29025
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1660
1327E	Count The Blocks combinatorics, dp, math	1800	x8926
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15618
1312D	Count the Arrays combinatorics, math	1700	x9441
1307E	Cow and Treats binary search, combinatorics, dp, greedy, implementation, math	2500	x1276
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x14514
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9334
1299D	Around the World bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees	3000	x439
1295F	Good Contest combinatorics, dp, probabilities	2700	x1213
1293B	JOE is on TV! combinatorics, greedy, math	1000	x21178
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3500	x310
1292C	Xenon's Attack on the Gangs combinatorics, dfs and similar, dp, greedy, trees	2300	x2058
1288C	Two Arrays combinatorics, dp	1600	x12845
1285F	Classical? binary search, combinatorics, number theory	2900	x1131
1284E	New Year and Castle Construction combinatorics, geometry, math, sortings	2500	x1299
1284C	New Year and Permutation combinatorics, math	1600	x7999
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10814
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x61
1279E	New Year Permutations combinatorics, dp	2700	x373
1279D	Santa's Bot combinatorics, math, probabilities	1700	x6302
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1869
1276C	Beautiful Rectangle brute force, combinatorics, constructive algorithms, data structures, greedy, math	2300	x1655
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4944
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x26427
1271E	Common Number binary search, combinatorics, dp, math	2100	x3382
1267K	Key Storage combinatorics, math	2100	x1908
1264D2	Beautiful Bracket Sequence (hard version) combinatorics, probabilities	2900	x963
1264D1	Beautiful Bracket Sequence (easy version) combinatorics, dp, probabilities	2600	x1269
1254E	Send Tree to Charlie combinatorics, dfs and similar, dsu, trees	3300	x265
1251F	Red-White Fence combinatorics, fft	2500	x819
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x1995
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x7337
1238D	AB-string binary search, combinatorics, dp, strings	1900	x5967
1237F	Balanced Domino Placements combinatorics, dp	2600	x879
1236B	Alice and the List of Presents combinatorics, math	1500	x11024
1228E	Another Filling the Grid combinatorics, dp, math	2300	x2714
1227F2	Wrong Answer on test 233 (Hard Version) combinatorics, math	2400	x1495
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x657
1215B	The Number of Products combinatorics, dp, implementation	1400	x12891
1207D	Number Of Permutations combinatorics	1800	x6071
1205E	Expected Value Again combinatorics, strings	3100	x277
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1657
1202D	Print a 1337-string... combinatorics, constructive algorithms, math, strings	1900	x5091
1197E	Culture Code binary search, combinatorics, data structures, dp, shortest paths, sortings	2300	x1643
1195D2	Submarine in the Rybinsk Sea (hard edition) combinatorics, math, number theory	1800	x4652
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7878
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2400	x990
1188E	Problem from Red Panda combinatorics	3300	x229
1185G2	Playlist for Polycarp (hard version) combinatorics, dp	2600	x760
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x2856
1181C	Flag brute force, combinatorics, dp, implementation	1900	x3119
1178F1	Short Colorful Strip combinatorics, dfs and similar, dp	2200	x2096
1178C	Tiles combinatorics, greedy, math	1300	x11904
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x1418