Problemset - Codeforces

Please read the new rule regarding the restriction on the use of AI tools. ×

→ Pay attention

Before contest
Kotlin Heroes: Episode 11
17:00:40
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
290D	Orange *special problem, implementation	1400	x1801
290B	QR code *special problem, implementation	1500	x2436
290A	Mysterious strings *special problem, implementation	1400	x2994
289B	Polo the Penguin and Matrix brute force, dp, implementation, sortings, ternary search	1400	x17251
289A	Polo the Penguin and Segments brute force, implementation	1100	x9217
288B	Polo the Penguin and Houses combinatorics	1500	x2912
288A	Polo the Penguin and Strings greedy	1300	x6491
287A	IQ Test brute force, implementation	1100	x19733
286A	Lucky Permutation constructive algorithms, math	1400	x3164
285C	Building Permutation greedy, implementation, sortings	1200	x23190
285B	Find Marble implementation	1200	x15005
285A	Slightly Decreasing Permutations greedy, implementation	1100	x13329
284A	Cows and Primitive Roots implementation, math, number theory	1400	x6559
282C	XOR and OR constructive algorithms, implementation, math	1500	x9380
282B	Painting Eggs greedy, math	1500	x12924
279B	Books binary search, brute force, implementation, two pointers	1400	x52387
279A	Point on Spiral brute force, geometry, implementation	1400	x5589
278B	New Problem brute force, strings	1500	x3453
277A	Learning Languages dfs and similar, dsu	1400	x18817
276C	Little Girl and Maximum Sum data structures, greedy, implementation, sortings	1500	x26258
276B	Little Girl and Game games, greedy	1300	x28444
274A	k-Multiple Free Set binary search, greedy, sortings	1500	x10030
272C	Dima and Staircase data structures, implementation	1500	x6779
272B	Dima and Sequence implementation, math	1400	x4020
271C	Secret constructive algorithms, implementation	1500	x2945
271B	Prime Matrix binary search, brute force, math, number theory	1300	x13000
270B	Multithreading data structures, greedy, implementation	1400	x4130
270A	Fancy Fence geometry, implementation, math	1100	x45226
268C	Beautiful Sets of Points constructive algorithms, implementation	1500	x13624
264B	Good Sequences dp, number theory	1500	x10140
264A	Escape from Stones constructive algorithms, data structures, implementation, two pointers	1200	x10754
262B	Roma and Changing Signs greedy	1200	x11336
261A	Maxim and Discounts greedy, sortings	1400	x5162
260A	Adding Digits implementation, math	1400	x14612
259B	Little Elephant and Magic Square brute force, implementation	1100	x13934
258A	Little Elephant and Bits greedy, math	1100	x22869
257B	Playing Cubes games, greedy, implementation	1300	x7042
257A	Sockets greedy, implementation, sortings	1100	x6474
255C	Almost Arithmetical Progression brute force, dp	1500	x4705
255B	Code Parsing implementation	1200	x4961
254B	Jury Size brute force, implementation	1500	x2150
254A	Cards with Numbers constructive algorithms, sortings	1200	x7038
253B	Physics Practical binary search, dp, sortings, two pointers	1400	x10679
253A	Boys and Girls greedy	1100	x11222
252A	Little Xor brute force, implementation	1100	x5277
251A	Points on Line binary search, combinatorics, two pointers	1300	x17574
250B	Restoring IPv6 implementation, strings	1500	x1980
248B	Chilly Willy math, number theory	1400	x5306
246B	Increase and Decrease greedy, math	1300	x11272
245E	Mishap in Club greedy, implementation	1400	x3277
245D	Restoring Table constructive algorithms, greedy	1500	x2301
245B	Internet Address implementation, strings	1100	x5218
242B	Big Segment implementation, sortings	1100	x15691
242A	Heads or Tails brute force, implementation	1100	x6371
241A	Old Peykan greedy	1300	x2229
239B	Easy Tape Programming brute force, implementation	1500	x1371
239A	Two Bags of Potatoes greedy, implementation, math	1200	x18802
238A	Not Wool Sequences constructive algorithms, math	1300	x2035
237B	Young Table implementation, sortings	1500	x2235
236B	Easy Number Challenge implementation, number theory	1300	x14163
234C	Weather dp, implementation	1300	x5512
234A	Lefthanders and Righthanders implementation	1200	x4429
233B	Non-square Equation binary search, brute force, math	1400	x7464
231B	Magic, Wizardry and Wonders constructive algorithms, greedy	1500	x3605
230B	T-primes binary search, implementation, math, number theory	1300	x74766
229A	Shifts brute force, two pointers	1500	x3507
228B	Two Tables brute force, implementation	1400	x3466
227B	Effective Approach implementation	1100	x27890
227A	Where do I Turn? geometry	1300	x4180
226A	Flying Saucer Segments math	1400	x3980
225A	Dice Tower constructive algorithms, greedy	1100	x11649
224B	Array bitmasks, implementation, two pointers	1500	x7313
224A	Parallelepiped brute force, geometry, math	1100	x26578
222B	Cosmic Tables data structures, implementation	1300	x6098
222A	Shooshuns and Sequence brute force, implementation	1200	x10736
221B	Little Elephant and Numbers implementation	1300	x4563
220A	Little Elephant and Problem implementation, sortings	1300	x11978
219B	Special Offer! Super Price 999 Bourles! implementation	1400	x5805
218B	Airport implementation	1100	x16382
218A	Mountain Scenery brute force, constructive algorithms, implementation	1100	x9411
217A	Ice Skating brute force, dfs and similar, dsu, graphs	1200	x21104
216A	Tiling with Hexagons implementation, math	1200	x4997
215B	Olympic Medal greedy, math	1300	x5561
212E	IT Restaurants dfs and similar, dp, trees	1500	x1735
208D	Prizes, Prizes, more Prizes implementation	1200	x7584
205B	Little Elephant and Sorting brute force, greedy	1400	x6030
204B	Little Elephant and Cards binary search, data structures	1500	x5187
204A	Little Elephant and Interval binary search, combinatorics, dp	1500	x5689
203C	Photographer greedy, sortings	1400	x5664
203B	Game on Paper brute force, implementation	1300	x2583
203A	Two Problems brute force, implementation	1200	x4164
198B	Jumping on Walls shortest paths	1400	x4252
197B	Limit math	1400	x4633
196A	Lexicographically Maximum Subsequence greedy, strings	1100	x5395
195B	After Training data structures, implementation, math	1300	x5196
194B	Square math	1200	x3512
192B	Walking in the Rain brute force, implementation	1100	x6250
192A	Funky Numbers binary search, brute force, implementation	1300	x10367
191A	Dynasty Puzzles dp	1500	x3945
190C	STL dfs and similar	1500	x2818