Problemset - Codeforces

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Educational Codeforces Round 166 (Rated for Div. 2)
34:40:23
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number theory

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Problems

#	Name
1027G	X-mouse in the Campus bitmasks, math, number theory	2600	x297
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x376
185D	Visit of the Great math, number theory	2600	x384
360D	Levko and Sets number theory	2600	x386
93E	Lostborn dp, math, number theory	2600	x435
542D	Superhero's Job dfs and similar, dp, hashing, math, number theory	2600	x498
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x510
963C	Cutting Rectangle brute force, math, number theory	2600	x561
1582G	Kuzya and Homework data structures, number theory	2600	x563
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x582
703E	Mishka and Divisors dp, number theory	2600	x588
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x601
982E	Billiard geometry, number theory	2600	x689
763C	Timofey and remoduling brute force, implementation, math, number theory	2600	x705
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x750
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x756
1398G	Running Competition bitmasks, fft, math, number theory	2600	x777
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x817
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x1003
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1094
1554E	You dfs and similar, dp, math, number theory	2600	x1185
1406E	Deleting Numbers interactive, math, number theory	2600	x1571
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1762
1325E	Ehab's REAL Number Theory Problem brute force, dfs and similar, graphs, number theory, shortest paths	2600	x1856
1488G	Painting Numbers *special problem, data structures, greedy, number theory	2500	x120
294D	Shaass and Painter Robot brute force, implementation, number theory	2500	x307
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x437
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x468
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x665
645F	Cowslip Collections combinatorics, math, number theory	2500	x760
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x772
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1004
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1024
792E	Colored Balls greedy, math, number theory	2500	x1047
710D	Two Arithmetic Progressions math, number theory	2500	x1166
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1184
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1215
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1268
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1268
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x1355
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1489
594D	REQ data structures, number theory	2500	x1519
1497E2	Square-free division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1571
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2196
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2201
1305F	Kuroni and the Punishment math, number theory, probabilities	2500	x2366
55D	Beautiful numbers dp, number theory	2500	x3620
73E	Morrowindows math, number theory	2400	x323
200E	Tractor College implementation, math, number theory, ternary search	2400	x333
1045B	Space Isaac hashing, number theory	2400	x497
283D	Cows and Cool Sequences dp, math, number theory	2400	x524
293C	Cube Problem brute force, math, number theory	2400	x555
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x579
922F	Divisibility constructive algorithms, dp, greedy, number theory	2400	x618
758F	Geometrical Progression brute force, math, number theory	2400	x621
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x676
582C	Superior Periodic Subarrays number theory	2400	x727
83D	Numbers dp, math, number theory	2400	x824
226C	Anniversary data structures, implementation, math, matrices, number theory	2400	x847
303C	Minimum Modular brute force, graphs, math, number theory	2400	x857
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x941
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x953
585C	Alice, Bob, Oranges and Apples number theory	2400	x965
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x966
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2400	x972
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x1000
17D	Notepad number theory	2400	x1040
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1046
498D	Traffic Jams in the Land data structures, dp, number theory	2400	x1065
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1266
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1315
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1316
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1355
1732D2	Balance (Hard version) brute force, data structures, number theory	2400	x1370
1036F	Relatively Prime Powers combinatorics, math, number theory	2400	x1412
1036E	Covered Points fft, geometry, number theory	2400	x1417
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x1481
912E	Prime Gift binary search, dfs and similar, math, meet-in-the-middle, number theory, two pointers	2400	x1492
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1515
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1528
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1541
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1657
990G	GCD Counting divide and conquer, dp, dsu, number theory, trees	2400	x1737
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1820
1491E	Fib-tree brute force, dfs and similar, divide and conquer, number theory, trees	2400	x2047
446C	DZY Loves Fibonacci Numbers data structures, math, number theory	2400	x3189
1346G	Two IP Cameras *special problem, math, number theory	2300	x132
774E	Big Number and Remainder *special problem, math, number theory	2300	x206
180B	Divisibility Rules math, number theory	2300	x327
364C	Beautiful Set brute force, number theory	2300	x586
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x900
659G	Fence Divercity combinatorics, dp, number theory	2300	x949
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x1000
300E	Empire Strikes Back binary search, math, number theory	2300	x1028
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2300	x1049
915G	Coprime Arrays math, number theory	2300	x1148
830C	Bamboo Partition brute force, data structures, implementation, math, number theory, sortings, two pointers	2300	x1188
772C	Vulnerable Kerbals constructive algorithms, dp, graphs, math, number theory	2300	x1190
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1201
711E	ZS and The Birthday Paradox math, number theory, probabilities	2300	x1244