Problemset - Codeforces

→ Pay attention

Before contest
Educational Codeforces Round 97 (Rated for Div. 2)
45:49:36
Register now »

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1413E	Solo mid Oracle binary search, math, ternary search		x710
1413A	Finding Sasuke math		x8073
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x70
1436B	Prime Square constructive algorithms, math	900	x9984
1436A	Reorder math	800	x12046
1433E	Two Round Dances combinatorics, math	1300	x9323
1433A	Boring Apartments implementation, math	800	x19004
1421D	Hexagons brute force, constructive algorithms, greedy, implementation, math, shortest paths	1900	x2643
1421A	XORwice bitmasks, greedy, math	800	x12775
1428E	Carrots for Rabbits binary search, data structures, greedy, math, sortings	2200	x2068
1428A	Box is Pull math	800	x11907
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x215
1430C	Numbers on Whiteboard constructive algorithms, data structures, greedy, implementation, math	1000	x10427
1430A	Number of Apartments brute force, constructive algorithms, math	900	x12256
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x642
1427A	Avoiding Zero math, sortings	900	x10585
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x1738
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x403
1423F	Coins math	2700	x134
1422F	Boring Queries data structures, math, number theory	2700	x276
1422C	Bargain combinatorics, dp, math	1700	x4606
1422B	Nice Matrix greedy, implementation, math	1300	x8552
1422A	Fence geometry, math	800	x13924
1408I	Bitwise Magic dp, math	3200	x69
1408C	Discrete Acceleration binary search, dp, implementation, math, two pointers	1500	x5802
1408B	Arrays Sum constructive algorithms, greedy, math	1400	x6164
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x4333
1426C	Increase and Copy binary search, constructive algorithms, math	1100	x11060
1426A	Floor Number implementation, math	800	x19013
1417B	Two Arrays greedy, math, sortings	1100	x9193
1417A	Copy-paste greedy, math	800	x13055
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x2032
1416B	Make Them Equal constructive algorithms, greedy, math	2000	x3488
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x477
1425C	Captain of Knights math	3100	x14
1420B	Rock and Lever bitmasks, math	1200	x11815
1420A	Cubes Sorting math, sortings	900	x14937
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x2248
1419C	Killjoy greedy, implementation, math	1500	x8970
1419B	Stairs brute force, constructive algorithms, greedy, implementation, math	1200	x10991
1418F	Equal Product data structures, math, number theory, two pointers	3000	x162
1418A	Buying Torches math	1000	x13322
1406E	Deleting Numbers interactive, math, number theory	2600	x914
1406D	Three Sequences constructive algorithms, data structures, greedy, math	2200	x2310
1406A	Subset Mex greedy, implementation, math	900	x15032
1407C	Chocolate Bunny constructive algorithms, interactive, math, two pointers	1600	x7152
1407B	Big Vova brute force, greedy, math, number theory	1300	x10937
1407A	Ahahahahahahahaha constructive algorithms, math	1100	x14064
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x461
1409D	Decrease the Sum of Digits greedy, math	1500	x10501
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x14468
1409B	Minimum Product brute force, greedy, math	1100	x17586
1409A	Yet Another Two Integers Problem greedy, math	800	x27334
1397B	Power Sequence brute force, math, number theory, sortings	1500	x9644
1403C	Chess Rush *special problem, combinatorics, dp, implementation, math	3200	x26
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x658
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x468
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x6143
1400B	RPG Protagonist brute force, greedy, math	1700	x7761
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x5724
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x14100
1401B	Ternary Sequence constructive algorithms, greedy, math	1100	x15636
1401A	Distance and Axis constructive algorithms, math	900	x18710
1392I	Kevin and Grid fft, graphs, math	3300	x60
1392H	ZS Shuffles Cards combinatorics, dp, math, probabilities	3000	x201
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x208
1392F	Omkar and Landslide binary search, constructive algorithms, data structures, greedy, math	2400	x1367
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x2411
1392B	Omkar and Infinity Clock implementation, math	800	x14606
1392A	Omkar and Password greedy, math	800	x15505
1398G	Running Competition bitmasks, fft, math, number theory	2600	x379
1398E	Two Types of Spells binary search, data structures, greedy, implementation, math, sortings	2200	x1546
1398C	Good Subarrays data structures, dp, math	1600	x10655
1398A	Bad Triangle geometry, math	800	x19743
1395A	Boboniu Likes to Color Balls brute force, math	1000	x15900
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x10045
1391A	Suborrays constructive algorithms, math	800	x19007
1393C	Pinkie Pie Eats Patty-cakes constructive algorithms, greedy, math, sortings	1700	x7300
1393A	Rainbow Dash, Fluttershy and Chess Coloring greedy, math	800	x16884
1388C	Uncle Bogdan and Country Happiness dfs and similar, greedy, math, trees	1800	x6624
1388B	Captain Flint and a Long Voyage greedy, math	1000	x16786
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x19226
1389E	Calendar Ambiguity math, number theory	2200	x2230
1389D	Segment Intersections brute force, greedy, implementation, math	2100	x3117
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x21045
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x3228
1387A	Graph *special problem, binary search, dfs and similar, dp, math, ternary search	2100	x344
1386B	Mixture *special problem, data structures, geometry, math, sortings	2900	x70
1379E	Inverse Genealogy constructive algorithms, divide and conquer, dp, math, trees	2800	x133
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x8298
1385A	Three Pairwise Maximums math	800	x22771
1381E	Origami geometry, math, sortings	3300	x55
1380G	Circular Dungeon greedy, math, probabilities	2600	x360
1380D	Berserk And Fireball constructive algorithms, greedy, implementation, math, two pointers	2000	x3207
1372C	Omkar and Baseball constructive algorithms, math	1500	x11168
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x15664
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x39
1375F	Integer Game constructive algorithms, games, interactive, math	2600	x1278
1375A	Sign Flipping constructive algorithms, math	1100	x14185
1374D	Zero Remainder Array math, sortings, two pointers	1400	x13138

←