Problemset - Codeforces

→ Pay attention

Before contest
Educational Codeforces Round 173 (Rated for Div. 2)
25:25:25
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1415F	Cakes for Clones dp	2900	x492
1415E	New Game Plus! constructive algorithms, greedy, math	2200	x2762
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5533
1415C	Bouncing Ball brute force, dp, implementation	1400	x11012
1415B	Repainting Street brute force, brute force, greedy	1100	x12219
1415A	Prison Break brute force, math	800	x15245
1413F	Roads and Ramen data structures, trees	2800	x794
1413E	Solo mid Oracle greedy, math, ternary search	2100	x2042
1413D	Shurikens data structures, greedy, implementation	1700	x6536
1413C	Perform Easily binary search, brute force, dp, implementation, sortings, two pointers	1900	x5781
1413B	A New Technique implementation	1100	x11740
1413A	Finding Sasuke constructive algorithms, math	800	x14857
1411G	No Game No Life bitmasks, games, math, matrices	2700	x679
1411F	The Thorny Path greedy, math	3000	x376
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1672
1411D	Grime Zoo brute force, greedy, implementation, strings	2100	x2546
1411C	Peaceful Rooks dfs and similar, dsu, graphs	1700	x8058
1411B	Fair Numbers brute force, number theory	1000	x20075
1411A	In-game Chat implementation	800	x20737
1409F	Subsequences of Length Two dp, strings	2100	x4525
1409E	Two Platforms binary search, dp, sortings, two pointers	1800	x7907
1409D	Decrease the Sum of Digits greedy, math	1500	x19644
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x23518
1409B	Minimum Product brute force, greedy, math	1100	x29223
1409A	Yet Another Two Integers Problem greedy, math	800	x68045
1408I	Bitwise Magic dp, math	3200	x179
1408H	Rainbow Triples binary search, data structures, flows, greedy	3300	x413
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x1078
1408F	Two Different constructive algorithms, divide and conquer	2300	x2424
1408E	Avoid Rainbow Cycles data structures, dsu, graphs, greedy, sortings, trees	2400	x2015
1408D	Searchlights binary search, brute force, data structures, dp, implementation, sortings, two pointers	2000	x4379
1408C	Discrete Acceleration binary search, dp, implementation, math, two pointers	1500	x8913
1408B	Arrays Sum constructive algorithms, greedy, math	1400	x10028
1408A	Circle Coloring constructive algorithms	800	x12530
1407E	Egor in the Republic of Dagestan constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths	2500	x1733
1407D	Discrete Centrifugal Jumps data structures, dp, graphs	2200	x5028
1407C	Chocolate Bunny constructive algorithms, interactive, math, two pointers	1600	x12275
1407B	Big Vova brute force, greedy, math, number theory	1300	x17140
1407A	Ahahahahahahahaha constructive algorithms, math	1100	x20546
1406E	Deleting Numbers interactive, math, number theory	2600	x1723
1406D	Three Sequences constructive algorithms, data structures, greedy, math	2200	x3548
1406C	Link Cut Centroids constructive algorithms, dfs and similar, graphs, trees	1700	x10429
1406B	Maximum Product brute force, dp, greedy, implementation, sortings	1200	x22865
1406A	Subset Mex greedy, implementation, math	900	x21640
1405B	Array Cancellation constructive algorithms, implementation	1000	x21753
1405A	Permutation Forgery constructive algorithms	800	x21524
1404E	Bricks flows, graph matchings, graphs	2800	x1276
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x1118
1404C	Fixed Point Removal binary search, constructive algorithms, data structures, greedy, two pointers	2300	x2715
1404B	Tree Tag dfs and similar, dp, games, trees	1900	x7531
1404A	Balanced Bitstring implementation, strings	1500	x15735
1403C	Chess Rush *special problem, combinatorics, dp, implementation, math	3200	x53
1403B	Spring cleaning *special problem, data structures, dfs and similar, graphs, trees	2300	x372
1403A	The Potion of Great Power *special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers	2400	x294
1402C	Star Trek *special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees	2600	x206
1402B	Roads *special problem, geometry, sortings	2900	x115
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x1210
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1780
1401E	Divide Square data structures, geometry, implementation, sortings	2400	x2467
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x9409
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x24574
1401B	Ternary Sequence constructive algorithms, greedy, math	1100	x21204
1401A	Distance and Axis constructive algorithms, math	900	x27651
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x982
1400F	x-prime Substrings brute force, dfs and similar, dp, string suffix structures, strings	2800	x916
1400E	Clear the Multiset data structures, divide and conquer, dp, greedy	2200	x5570
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x10448
1400C	Binary String Reconstruction 2-sat, brute force, constructive algorithms, greedy	1500	x17475
1400B	RPG Protagonist brute force, greedy, math	1700	x11265
1400A	String Similarity constructive algorithms, strings	800	x27151
1399F	Yet Another Segments Subset data structures, dp, graphs, sortings	2300	x1644
1399E2	Weights Division (hard version) binary search, dfs and similar, greedy, sortings, trees, two pointers	2200	x2300
1399E1	Weights Division (easy version) data structures, dfs and similar, greedy, trees	2000	x5908
1399D	Binary String To Subsequences constructive algorithms, data structures, greedy, implementation	1500	x18445
1399C	Boats Competition brute force, greedy, two pointers	1200	x29508
1399B	Gifts Fixing greedy	800	x43974
1399A	Remove Smallest greedy, sortings	800	x68272
1398G	Running Competition bitmasks, fft, math, number theory	2600	x1125
1398F	Controversial Rounds binary search, data structures, dp, greedy, two pointers	2500	x1294
1398E	Two Types of Spells binary search, data structures, greedy, implementation, math, sortings	2200	x2444
1398D	Colored Rectangles dp, greedy, sortings	1800	x11612
1398C	Good Subarrays data structures, dp, math	1600	x27419
1398B	Substring Removal Game games, greedy, sortings	800	x24783
1398A	Bad Triangle geometry, math	800	x27764
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14836
1397A	Juggling Letters greedy, strings	800	x28802
1396E	Distance Matching constructive algorithms, dfs and similar, trees	3200	x352
1396D	Rainbow Rectangles data structures, sortings, two pointers	3300	x311
1396C	Monster Invaders dp, greedy, implementation	2300	x2633
1396B	Stoned Game brute force, constructive algorithms, games, greedy	1800	x11545
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x15609
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x14255
1395B	Boboniu Plays Chess constructive algorithms	1100	x16091
1395A	Boboniu Likes to Color Balls brute force, math	1000	x24283
1394E	Boboniu and Banknote Collection strings	3500	x152
1394D	Boboniu and Jianghu dp, greedy, sortings, trees	2800	x1039
1394C	Boboniu and String binary search, geometry, ternary search	2600	x1125
1394B	Boboniu Walks on Graph brute force, dfs and similar, graphs, hashing	2300	x2037
1394A	Boboniu Chats with Du dp, greedy, sortings, two pointers	1800	x6836
1393E2	Twilight and Ancient Scroll (harder version) dp, hashing, implementation, string suffix structures, strings, two pointers	3200	x377