Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
2 days
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Difficulty: —

number theory

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Problems

#	Name
483A	Counterexample brute force, implementation, math, number theory	1100	x22334
474F	Ant colony data structures, math, number theory	2100	x7843
472A	Design Tutorial: Learn from Math math, number theory	800	x57402
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1422
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12119
456B	Fedya and Maths math, number theory	1200	x16082
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3346
449E	Jzzhu and Squares dp, math, number theory	2900	x284
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2203
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1450
446C	DZY Loves Fibonacci Numbers data structures, math, number theory	2400	x3191
439C	Devu and Partitioning of the Array brute force, constructive algorithms, implementation, number theory	1700	x3802
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1803
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x21051
414A	Mashmokh and Numbers constructive algorithms, number theory	1500	x9657
402D	Upgrading Array dp, greedy, math, number theory	1800	x2521
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3988
396B	On Sum of Fractions math, number theory		x1045
396A	On Number of Decompositions into Multipliers combinatorics, math, number theory		x1462
385C	Bear and Prime Numbers binary search, brute force, data structures, dp, implementation, math, number theory	1700	x9415
375A	Divisible by Seven math, number theory	1600	x4672
371B	Fox Dividing Cheese math, number theory	1300	x10953
364C	Beautiful Set brute force, number theory	2300	x587
361B	Levko and Permutation constructive algorithms, math, number theory	1200	x7902
360D	Levko and Sets number theory	2600	x394
359C	Prime Number math, number theory	1900	x2946
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x2991
353C	Find Maximum implementation, math, number theory	1600	x4752
348B	Apple Tree dfs and similar, number theory, trees	2100	x2048
346E	Doodle Jump math, number theory	3000	x256
346A	Alice and Bob games, math, number theory	1600	x8479
343A	Rational Resistance math, number theory	1600	x8549
338D	GCD Table chinese remainder theorem, math, number theory	2900	x1097
337E	Divisor Tree brute force, number theory, trees	2200	x1007
337C	Quiz binary search, greedy, math, matrices, number theory	1600	x4787
337B	Routine Problem greedy, math, number theory	1400	x9119
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x935
336C	Vasily the Bear and Sequence brute force, greedy, implementation, number theory	1800	x2378
313A	Ilya and Bank Account implementation, number theory	900	x53952
306C	White, Black and White Again combinatorics, number theory	2100	x460
303D	Rotatable Number math, number theory	2600	x280
303C	Minimum Modular brute force, graphs, math, number theory	2400	x857
300E	Empire Strikes Back binary search, math, number theory	2300	x1028
299A	Ksusha and Array brute force, number theory, sortings	1000	x7784
294D	Shaass and Painter Robot brute force, implementation, number theory	2500	x308
294C	Shaass and Lights combinatorics, number theory	1900	x3725
293C	Cube Problem brute force, math, number theory	2400	x555
284A	Cows and Primitive Roots implementation, math, number theory	1400	x6400
283D	Cows and Cool Sequences dp, math, number theory	2400	x524
279E	Beautiful Decomposition dp, games, greedy, number theory	1900	x1411
271E	Three Horses constructive algorithms, math, number theory	2200	x480
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12495
267A	Subtractions math, number theory	900	x7185
264B	Good Sequences dp, number theory	1500	x9730
251C	Number Transformation dp, greedy, number theory	2000	x1013
248B	Chilly Willy math, number theory	1400	x5207
237C	Primes on Interval binary search, number theory, two pointers	1600	x5594
236B	Easy Number Challenge implementation, number theory	1300	x13548
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x758
235A	LCM Challenge number theory	1600	x16932
230B	T-primes binary search, implementation, math, number theory	1300	x70676
226C	Anniversary data structures, implementation, math, matrices, number theory	2400	x847
225E	Unsolvable math, number theory	2100	x784
225B	Well-known Numbers binary search, greedy, number theory	1600	x3108
223C	Partial Sums combinatorics, math, number theory	1900	x1514
222C	Reducing Fractions implementation, math, number theory, sortings	1800	x2098
216E	Martian Luck math, number theory	2000	x546
215E	Periodical Numbers combinatorics, dp, number theory	2100	x539
200E	Tractor College implementation, math, number theory, ternary search	2400	x334
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x25283
185D	Visit of the Great math, number theory	2600	x386
180B	Divisibility Rules math, number theory	2300	x328
177B2	Rectangular Game number theory	1200	x2835
177B1	Rectangular Game number theory	1000	x3996
172D	Calendar Reform *special problem, number theory	1500	x1383
172B	Pseudorandom Sequence Period *special problem, implementation, number theory	1200	x2692
171F	ucyhf *special problem, brute force, implementation, number theory	1600	x1253
158D	Ice Sculptures *special problem, brute force, number theory	1300	x6185
154B	Colliders math, number theory	1600	x4307
150A	Win or Freeze games, math, number theory	1400	x7607
134B	Pairs of Numbers brute force, dfs and similar, math, number theory	1900	x1926
123A	Prime Permutation implementation, number theory, strings	1300	x3523
122A	Lucky Division brute force, number theory	1000	x117120
121C	Lucky Permutation brute force, combinatorics, number theory	1900	x1271
117B	Very Interesting Game brute force, number theory	1800	x1539
113C	Double Happiness brute force, math, number theory	2200	x1203
111B	Petya and Divisors binary search, data structures, number theory	1900	x3556
93E	Lostborn dp, math, number theory	2600	x435
84A	Toy Army math, number theory	900	x14628
83D	Numbers dp, math, number theory	2400	x825
78C	Beaver Game dp, games, number theory	2000	x1808
75C	Modified GCD binary search, number theory	1600	x12073
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x951
73E	Morrowindows math, number theory	2400	x324
71C	Round Table Knights dp, math, number theory	1600	x6260
68A	Irrational problem implementation, number theory	1100	x4832
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3063
64E	Prime Segment *special problem, brute force, math, number theory	1800	x235
59B	Fortune Telling implementation, number theory	1200	x6713
55D	Beautiful numbers dp, number theory	2500	x3622