Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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combinatorics

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Problems

#	Name
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x30876
1743A	Password brute force, combinatorics, implementation, math	800	x25969
1674B	Dictionary combinatorics, math	800	x25531
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x20994
1821A	Matching combinatorics, math	800	x19296
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18330
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15763
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13224
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13080
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23460
1543B	Customising the Track combinatorics, greedy, math	900	x22612
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x21948
1582B	Luntik and Subsequences combinatorics, math	900	x18650
1777B	Emordnilap combinatorics, greedy, math	900	x16539
1166A	Silent Classroom combinatorics, greedy	900	x13800
1840C	Ski Resort combinatorics, math, two pointers	1000	x24290
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22815
610A	Pasha and Stick combinatorics, math	1000	x21919
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20749
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19553
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14362
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21512
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21379
630C	Lucky Numbers combinatorics, math	1100	x20317
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19105
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17307
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x16974
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x24953
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22478
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x18773
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x16918
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x38293
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35099
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x28897
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28011
1433E	Two Round Dances combinatorics, math	1300	x17972
617B	Chocolate combinatorics	1300	x17247
251A	Points on Line binary search, combinatorics, two pointers	1300	x16510
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x15880
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15474
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15201
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14714
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12462
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11967
1178C	Tiles combinatorics, greedy, math	1300	x11198
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10829
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10768
1096B	Substring Removal combinatorics, math, strings	1300	x10304
844B	Rectangles combinatorics, math	1300	x6966
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6952
630F	Selection of Personnel combinatorics, math	1300	x6538
171B	Star *special problem, combinatorics	1300	x3931
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20658
1475C	Ball in Berland combinatorics, graphs, math	1400	x19860
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13650
1215B	The Number of Products combinatorics, dp, implementation	1400	x12012
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11654
131C	The World is a Theatre combinatorics, math	1400	x10601
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10575
152C	Pocket Book combinatorics	1400	x10235
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9510
978E	Bus Video System combinatorics, math	1400	x9189
1762C	Binary Strings are Fun combinatorics, math	1400	x8809
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7144
630H	Benches combinatorics, math	1400	x4728
124B	Permutations brute force, combinatorics, implementation	1400	x3732
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14928
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14517
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13151
1569C	Jury Meeting combinatorics, math	1500	x11618
584B	Kolya and Tanya combinatorics	1500	x11558
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11093
1236B	Alice and the List of Presents combinatorics, math	1500	x10613
1436C	Binary Search binary search, combinatorics	1500	x10503
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10102
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9888
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9359
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8664
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8362
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x7999
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7657
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7486
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7391
1081C	Colorful Bricks combinatorics, dp, math	1500	x6946
608B	Hamming Distance Sum combinatorics, strings	1500	x6463
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6266
817B	Makes And The Product combinatorics, implementation, math, sortings	1500	x5530
204A	Little Elephant and Interval binary search, combinatorics, dp	1500	x5512
374B	Inna and Nine combinatorics, greedy	1500	x3228
288B	Polo the Penguin and Houses combinatorics	1500	x2843
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13475
1475E	Advertising Agency combinatorics, math, sortings	1600	x12809
1288C	Two Arrays combinatorics, dp	1600	x12243
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11795
322B	Ciel and Flowers combinatorics, math	1600	x11452
1907E	Good Triples brute force, combinatorics, number theory	1600	x8628
1795D	Triangle Coloring combinatorics, math	1600	x8383
1452D	Radio Towers combinatorics, dp, math	1600	x7739
1284C	New Year and Permutation combinatorics, math	1600	x7685
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7568

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