Problemset - Codeforces

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Educational Codeforces Round 97 (Rated for Div. 2)
19:53:06
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combinatorics

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Problems

#	Name
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x19739
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x18678
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x17708
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x15986
1293B	JOE is on TV! combinatorics, greedy, math	1000	x14444
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x13015
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x12382
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x11806
1326C	Permutation Partitions combinatorics, greedy, math	1300	x11429
610A	Pasha and Stick combinatorics, math	1000	x11325
630C	Lucky Numbers combinatorics, math	1100	x10898
1166A	Silent Classroom combinatorics, greedy	900	x10698
617B	Chocolate combinatorics	1300	x10603
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x10050
1433E	Two Round Dances combinatorics, math	1300	x9490
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x9184
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x8686
251A	Points on Line binary search, combinatorics, two pointers	1300	x8678
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x8371
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x7989
584B	Kolya and Tanya combinatorics	1500	x7899
621B	Wet Shark and Bishops combinatorics, implementation	1300	x7812
1215B	The Number of Products combinatorics, dp, implementation	1400	x7760
1236B	Alice and the List of Presents combinatorics, math	1500	x7637
1178C	Tiles combinatorics, greedy, math	1300	x7542
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x7496
322B	Ciel and Flowers combinatorics, math	1600	x7398
1096B	Substring Removal combinatorics, math, strings	1300	x7356
1288C	Two Arrays combinatorics, dp	1600	x7301
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x6909
152C	Pocket Book combinatorics	1400	x6632
131C	The World is a Theatre combinatorics, math	1400	x6563
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x6453
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x6450
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6247
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x6176
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x6151
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x6117
1327E	Count The Blocks combinatorics, dp, math	1800	x5983
1312D	Count the Arrays combinatorics, math	1700	x5915
978E	Bus Video System combinatorics, math	1400	x5915
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x5807
1284C	New Year and Permutation combinatorics, math	1600	x5761
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x5332
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x5296
489D	Unbearable Controversy of Being brute force, combinatorics, dfs and similar, graphs	1700	x5242
1436C	Binary Search binary search, combinatorics	1500	x4969
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x4918
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x4888
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x4874
459C	Pashmak and Buses combinatorics, constructive algorithms, math	1900	x4738
608B	Hamming Distance Sum combinatorics, strings	1500	x4675
844B	Rectangles combinatorics, math	1300	x4654
300C	Beautiful Numbers brute force, combinatorics	1800	x4654
1422C	Bargain combinatorics, dp, math	1700	x4625
1081C	Colorful Bricks combinatorics, dp, math	1500	x4610
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x4481
518D	Ilya and Escalator combinatorics, dp, math, probabilities	1700	x4376
630F	Selection of Personnel combinatorics, math	1300	x4258
1036C	Classy Numbers combinatorics, dp	1900	x4218
1207D	Number Of Permutations combinatorics	1800	x4038
1238D	AB-string binary search, combinatorics, dp, strings	1900	x4036
204A	Little Elephant and Interval binary search, combinatorics, dp	1500	x3963
1359E	Modular Stability combinatorics, math, number theory	2000	x3953
621C	Wet Shark and Flowers combinatorics, math, number theory, probabilities	1700	x3800
1371E1	Asterism (Easy Version) binary search, brute force, combinatorics, math, number theory, sortings	1900	x3788
479E	Riding in a Lift combinatorics, dp	1900	x3718
364A	Matrix combinatorics, data structures, implementation	1600	x3715
1279D	Santa's Bot combinatorics, math, probabilities	1700	x3707
817B	Makes And The Product combinatorics, implementation, math, sortings	1500	x3687
685A	Robbers' watch brute force, combinatorics, dp, math	1700	x3679
888D	Almost Identity Permutations combinatorics, dp, math	1600	x3569
894B	Ralph And His Magic Field combinatorics, constructive algorithms, math, number theory	1800	x3485
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x3480
1195D2	Submarine in the Rybinsk Sea (hard edition) combinatorics, math, number theory	1800	x3478
986B	Petr and Permutations combinatorics, math	1800	x3470
1043D	Mysterious Crime brute force, combinatorics, math, meet-in-the-middle, two pointers	1700	x3464
1102E	Monotonic Renumeration combinatorics, sortings	1700	x3447
1202D	Print a 1337-string... combinatorics, constructive algorithms, math, strings	1900	x3387
552D	Vanya and Triangles brute force, combinatorics, data structures, geometry, math, sortings	1900	x3382
689C	Mike and Chocolate Thieves binary search, combinatorics, math	1700	x3246
711D	Directed Roads combinatorics, dfs and similar, graphs, math	1900	x3211
869C	The Intriguing Obsession combinatorics, dp, math	1800	x3195
340C	Tourist Problem combinatorics, implementation, math	1600	x3085
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x3053
630H	Benches combinatorics, math	1400	x2803
1366E	Two Arrays binary search, brute force, combinatorics, constructive algorithms, dp, two pointers	2100	x2787
150B	Quantity of Strings combinatorics, dfs and similar, graphs, math	1600	x2776
1172B	Nauuo and Circle combinatorics, dfs and similar, dp, trees	1900	x2775
914C	Travelling Salesman and Special Numbers brute force, combinatorics, dp	1800	x2707
630I	Parking Lot combinatorics, math	1700	x2682
1332E	Height All the Same combinatorics, constructive algorithms, math, matrices	2100	x2640
500D	New Year Santa Network combinatorics, dfs and similar, graphs, trees	1900	x2586
1426F	Number of Subsequences combinatorics, dp, strings	2000	x2572
171B	Star *special problem, combinatorics	1300	x2564
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x2544
1000D	Yet Another Problem On a Subsequence combinatorics, dp	1900	x2538
374B	Inna and Nine combinatorics, greedy	1500	x2505
124B	Permutations brute force, combinatorics, implementation	1400	x2474
294C	Shaass and Lights combinatorics, number theory	1900	x2437

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