Problemset - Codeforces

→ Pay attention

Before contest
Educational Codeforces Round 173 (Rated for Div. 2)
37:48:17
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
309E	Sheep binary search, greedy	2900	x233
309D	Tennis Rackets brute force, geometry	2700	x176
309C	Memory for Arrays binary search, bitmasks, greedy	1900	x1371
309B	Context Advertising dp, two pointers	2100	x722
309A	Morning run binary search, math, two pointers	2000	x491
306D	Polygon constructive algorithms, geometry	2300	x284
306C	White, Black and White Again combinatorics, number theory	2100	x489
306B	Optimizer data structures, greedy, sortings	2100	x450
306A	Candies implementation	800	x7109
305E	Playing with String games	2300	x641
305D	Olya and Graph combinatorics, math	2200	x513
305C	Ivan and Powers of Two greedy, implementation	1600	x2466
305B	Continued Fractions brute force, implementation, math	1700	x2155
305A	Strange Addition brute force, constructive algorithms, implementation	1600	x4826
304B	Calendar brute force, implementation	1300	x2993
304A	Pythagorean Theorem II brute force, math	1200	x10786
303E	Random Ranking dp, math, probabilities	3000	x324
303D	Rotatable Number math, number theory	2600	x301
303C	Minimum Modular brute force, graphs, math, number theory	2400	x894
303B	Rectangle Puzzle II implementation, math	1700	x1347
303A	Lucky Permutation Triple constructive algorithms, implementation, math	1300	x7999
302B	Eugeny and Play List binary search, implementation, two pointers	1200	x8314
302A	Eugeny and Array implementation	800	x9157
301E	Yaroslav and Arrangements dp	2800	x366
301D	Yaroslav and Divisors data structures	2200	x2443
301C	Yaroslav and Algorithm constructive algorithms	2500	x475
301B	Yaroslav and Time binary search, graphs, shortest paths	2100	x2413
301A	Yaroslav and Sequence constructive algorithms	1800	x3096
300E	Empire Strikes Back binary search, math, number theory	2300	x1048
300D	Painting Square dp, fft	2300	x759
300C	Beautiful Numbers brute force, combinatorics	1800	x9737
300B	Coach brute force, dfs and similar, graphs	1500	x6399
300A	Array brute force, constructive algorithms, implementation	1100	x23322
299B	Ksusha the Squirrel brute force, implementation	900	x5456
299A	Ksusha and Array brute force, number theory, sortings	1000	x8244
298B	Sail brute force, greedy, implementation	1200	x14362
298A	Snow Footprints greedy, implementation	1300	x11021
297E	Mystic Carvings data structures	3000	x377
297D	Color the Carpet constructive algorithms	2500	x589
297C	Splitting the Uniqueness constructive algorithms	2400	x966
297B	Fish Weight constructive algorithms, greedy	1600	x3545
297A	Parity Game constructive algorithms	1700	x3661
296B	Yaroslav and Two Strings combinatorics, dp	2000	x2319
296A	Yaroslav and Permutations greedy, math	1100	x23511
295E	Yaroslav and Points data structures	2500	x700
295D	Greg and Caves combinatorics, dp	2400	x663
295C	Greg and Friends combinatorics, dp, graphs, shortest paths	2100	x1760
295B	Greg and Graph dp, graphs, shortest paths	1700	x14625
295A	Greg and Array data structures, implementation	1400	x18640
294E	Shaass the Great dp, trees	2300	x960
294D	Shaass and Painter Robot brute force, implementation, number theory	2500	x363
294C	Shaass and Lights combinatorics, number theory	1900	x3863
294B	Shaass and Bookshelf dp, greedy	1700	x4581
294A	Shaass and Oskols implementation, math	800	x23936
293E	Close Vertices data structures, divide and conquer, trees	2700	x1475
293D	Ksusha and Square geometry, math, probabilities, two pointers	2700	x240
293C	Cube Problem brute force, math, number theory	2400	x579
293B	Distinct Paths brute force, combinatorics	2700	x872
293A	Weird Game games, greedy	1500	x2923
292E	Copying Data data structures	1900	x4222
292D	Connected Components data structures, dfs and similar, dp, dsu	1900	x2460
292C	Beautiful IP Addresses brute force	2000	x1174
292B	Network Topology graphs, implementation	1200	x8610
292A	SMSC implementation	1100	x2712
291E	Tree-String Problem *special problem, dfs and similar, hashing, strings	2000	x1326
291D	Parallel Programming *special problem, greedy	1600	x1482
291C	Network Mask *special problem, bitmasks, brute force, implementation	1600	x1686
291B	Command Line Arguments *special problem, implementation, strings	1300	x3035
291A	Spyke Talks *special problem, implementation, sortings	800	x6134
290F	Greedy Petya *special problem, dfs and similar, graphs, greedy	2800	x134
290E	HQ *special problem, constructive algorithms	2500	x205
290D	Orange *special problem, implementation	1400	x1814
290C	WTF? *special problem, graph matchings, implementation, trees	1700	x1552
290B	QR code *special problem, implementation	1500	x2452
290A	Mysterious strings *special problem, implementation	1400	x3012
289B	Polo the Penguin and Matrix brute force, dp, implementation, sortings, ternary search	1400	x17541
289A	Polo the Penguin and Segments brute force, implementation	1100	x9381
288E	Polo the Penguin and Lucky Numbers dp, implementation, math	2800	x300
288D	Polo the Penguin and Trees combinatorics, dfs and similar, trees	2400	x759
288C	Polo the Penguin and XOR operation implementation, math	1700	x2343
288B	Polo the Penguin and Houses combinatorics	1500	x2951
288A	Polo the Penguin and Strings greedy	1300	x6519
287B	Pipeline binary search, math	1700	x10040
287A	IQ Test brute force, implementation	1100	x20130
286E	Ladies' Shop constructive algorithms, fft, math	2800	x835
286D	Tourists data structures, sortings	2600	x379
286C	Main Sequence greedy, implementation	2100	x1516
286B	Shifting implementation	2200	x1121
286A	Lucky Permutation constructive algorithms, math	1400	x3193
285E	Positions in Permutations combinatorics, dp, math	2600	x1004
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1557
285C	Building Permutation greedy, implementation, sortings	1200	x23522
285B	Find Marble implementation	1200	x15120
285A	Slightly Decreasing Permutations greedy, implementation	1100	x13428
284B	Cows and Poker Game brute force, implementation	1000	x6884
284A	Cows and Primitive Roots implementation, math, number theory	1400	x6628
283E	Cow Tennis Tournament combinatorics, data structures, math	2800	x778
283D	Cows and Cool Sequences dp, math, number theory	2400	x553
283C	Coin Troubles dp	2100	x1457
283B	Cow Program dfs and similar, dp, graphs	1700	x3674