Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 973 (Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1532B	Frog Jumping *special problem, math		x823
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x784
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x9166
1530A	Binary Decimal greedy, math	800	x21033
1529B	Sifid and Strange Subsequences greedy, math, sortings	1100	x20544
1529A	Eshag Loves Big Arrays constructive algorithms, greedy, math	800	x29715
1528F	AmShZ Farm combinatorics, fft, math	3300	x286
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8671
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1901
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13486
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1046
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2405
1526B	I Hate 1111 dp, math, number theory	1400	x30334
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2044
1525A	Potion-making math, number theory	800	x25331
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1643
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x21285
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x36867
1520E	Arranging The Sheep greedy, math	1400	x21240
1520D	Same Differences data structures, hashing, math	1200	x46430
1520B	Ordinary Numbers brute force, math, number theory	800	x44213
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15152
1519B	The Cake Is a Lie dp, math	800	x30736
1519A	Red and Blue Beans math	800	x28725
1517A	Sum of 2050 greedy, math	800	x25478
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x860
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11899
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x1005
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3535
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24816
1515A	Phoenix and Gold constructive algorithms, greedy, math	800	x20201
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x24731
1514A	Perfectly Imperfect Array math, number theory	800	x24078
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1494
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x14603
1512G	Short Task brute force, dp, math, number theory	1700	x8101
1512E	Permutation by Sum brute force, greedy, math	1600	x10421
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2574
1511B	GCD Length constructive algorithms, math, number theory	1100	x22810
1510J	Japanese Game constructive algorithms, math	2700	x521
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x479
1510D	Digits dp, math, number theory	2100	x1889
1506F	Triangular Paths constructive algorithms, graphs, math, shortest paths, sortings	2000	x3258
1506A	Strange Table math	800	x30567
1505F	Math *special problem, math	2200	x1498
1504B	Flip the Bits constructive algorithms, greedy, implementation, math	1200	x18386
1503E	2-Coloring combinatorics, dp, math	3100	x692
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x2038
1500A	Going Home brute force, hashing, implementation, math	1800	x8799
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1503
1499D	The Number of Pairs dp, math, number theory	2100	x5795
1499C	Minimum Grid Path brute force, data structures, greedy, math	1500	x12612
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21224
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x911
1498A	GCD Sum brute force, math	800	x23139
1497E2	Square-Free Division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1667
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8288
1497C2	k-LCM (hard version) constructive algorithms, math	1600	x17149
1497C1	k-LCM (easy version) constructive algorithms, math	1200	x25607
1497B	M-arrays constructive algorithms, greedy, math	1200	x19777
1496B	Max and Mex math	1100	x17523
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1314
1495A	Diamond Miner geometry, greedy, math, sortings	1200	x17011
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x926
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4972
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x6082
1492B	Card Deck data structures, greedy, math	1100	x18352
1492A	Three swimmers math	800	x22616
1491G	Switch and Flip constructive algorithms, graphs, math	2800	x820
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x7151
1491B	Minimal Cost brute force, math	1200	x13774
1490G	Old Floppy Drive binary search, data structures, math	1900	x5630
1490F	Equalize the Array binary search, data structures, greedy, math, sortings	1500	x16059
1490C	Sum of Cubes binary search, brute force, brute force, math	1100	x32911
1490B	Balanced Remainders brute force, constructive algorithms, math	1000	x26115
1490A	Dense Array greedy, math	800	x31116
1488J	Flower Shop *special problem, data structures, fft, math	3100	x35
1488C	Two Policemen *special problem, binary search, brute force, math	1900	x405
1488A	From Zero To Y *special problem, math	900	x1392
1487G	String Counting combinatorics, dp, fft, math	2700	x594
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x17807
1487C	Minimum Ties brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math	1500	x14099
1487B	Cat Cycle math, number theory	1200	x20863
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x5134
1485C	Floor and Mod binary search, brute force, math, number theory	1700	x9903
1485B	Replace and Keep Sorted dp, implementation, math	1200	x17032
1485A	Add and Divide brute force, greedy, math, number theory	1000	x22281
1482B	Restore Modulo implementation, math	1500	x9165
1482A	Prison Break math	800	x20401
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x205
1478C	Nezzar and Symmetric Array implementation, math, sortings	1700	x9731
1478B	Nezzar and Lucky Number brute force, dp, greedy, math	1100	x18256
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x131
1477C	Nezzar and Nice Beatmap constructive algorithms, geometry, greedy, math, sortings	2200	x2302
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x5894
1476B	Inflation binary search, brute force, greedy, math	1300	x19959
1476A	K-divisible Sum binary search, constructive algorithms, greedy, math	1000	x37114
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6772
1475E	Advertising Agency combinatorics, math, sortings	1600	x13551
1475C	Ball in Berland combinatorics, graphs, math	1400	x21050