Educational Codeforces Round 8

Solutions are presented as using the least memory and the fastest execution time. It also takes the top 10 most recent solutions from each language. If you want to limit to a specific index, click the "Solved" button and go to that problem.

ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
628 Educational Codeforces Round 8 FINISHED False 7200 275929199 Feb. 19, 2016, 3 p.m.

Problems

Solved$
Index
Name
Type
Tags
Community Tag
Rating
( 6129 ) D Magic Numbers PROGRAMMING dp 2200

B"Consider the decimal presentation of an integer. Let's call a number d-magic if digit d appears in decimal presentation of the number on even positions and nowhere else. For example, the numbers 1727374, 17, 1 are 7-magic but 77, 7, 123, 34, 71 are not 7-magic. On the other hand the number 7 is 0-magic, 123 is 2-magic, 34 is 4-magic and 71 is 1-magic. Find the number of d-magic numbers in the segment [a, xe2 x80 x89b] that are multiple of m. Because the answer can be very huge you should only find its value modulo 109 xe2 x80 x89+ xe2 x80 x897 (so you should find the remainder after dividing by 109 xe2 x80 x89+ xe2 x80 x897). The first line contains two integers m, xe2 x80 x89d (1 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89m xe2 x80 x89 xe2 x89 xa4 xe2 x80 x892000, 0 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89d xe2 x80 x89 xe2 x89 xa4 xe2 x80 x899) -- the parameters from the problem statement. The second line contains positive integer a in decimal presentation (without leading zeroes). The third line contains positive integer b in decimal presentation (without leading zeroes). It is guaranteed that a xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89b, the number of digits in a and b are the same and don't exceed 2000. Print the only integer a -- the remainder after dividing by 109 xe2 x80 x89+ xe2 x80 x897 of the number of d-magic numbers in segment [a, xe2 x80 x89b] that are multiple of m. The numbers from the answer of the first example are 16, 26, 36, 46, 56, 76, 86 and 96. The numbers from the answer of the second example are 2, 4, 6 and 8. The numbers from the answer of the third example are 1767, 2717, 5757, 6707, 8797 and 9747."...

Tutorials

43203

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
16212356 Gassa D Feb. 19, 2016, 5:17 p.m. OK D TESTS 66 530 4198400 2200
16212299 Gassa D Feb. 19, 2016, 5:15 p.m. OK D TESTS 66 702 4198400 2200
50412898 PhuongPeu D Feb. 24, 2019, 4:25 a.m. OK FPC TESTS 66 436 80793600 2200
16210849 Valerich D Feb. 19, 2016, 4:44 p.m. OK FPC TESTS 66 670 32460800 2200
16827100 Gray_58 D March 19, 2016, 8:28 p.m. OK FPC TESTS 66 826 79769600 2200
67287836 tan12341 D Dec. 20, 2019, 2:45 p.m. OK FPC TESTS 66 1356 96563200 2200
45352782 luogu_bot1 D Nov. 6, 2018, 7:35 a.m. OK FPC TESTS 66 1933 131072000 2200
16225844 Stardust D Feb. 20, 2016, 9:08 a.m. OK GNU C++ TESTS 66 93 16076800 2200
16226076 wu6shen D Feb. 20, 2016, 9:23 a.m. OK GNU C++ TESTS 66 109 16179200 2200
16265656 Vlad_kv D Feb. 21, 2016, 6:11 p.m. OK GNU C++ TESTS 66 156 16076800 2200
16758281 I_love_Captain_America D March 17, 2016, 6:14 a.m. OK GNU C++ TESTS 66 156 97177600 2200
16477930 liuaohanjsj D March 3, 2016, 7:13 a.m. OK GNU C++ TESTS 66 171 16179200 2200
17978072 hanjitao D May 18, 2016, 10:49 a.m. OK GNU C++ TESTS 66 171 18636800 2200
17019284 RNS_CUS D March 29, 2016, 12:16 p.m. OK GNU C++ TESTS 66 186 18636800 2200
16279292 Kyle_Chi D Feb. 22, 2016, 3:16 p.m. OK GNU C++ TESTS 66 186 32256000 2200
17139951 windy7926778 D April 3, 2016, 5:10 a.m. OK GNU C++ TESTS 66 187 2048000 2200
36742952 vjudge1 D March 30, 2018, 9:52 a.m. OK GNU C++ TESTS 66 187 19660800 2200
59589107 rainboy D Aug. 27, 2019, 7:26 p.m. OK GNU C11 TESTS 66 218 32051200 2200
16610581 winger D March 9, 2016, 2:26 a.m. OK GNU C++11 TESTS 66 78 0 2200
16641689 winger D March 11, 2016, 1:18 a.m. OK GNU C++11 TESTS 66 93 0 2200
16627986 winger D March 10, 2016, 6:18 a.m. OK GNU C++11 TESTS 66 93 0 2200
16610362 winger D March 9, 2016, 1:44 a.m. OK GNU C++11 TESTS 66 93 0 2200
16206627 halyavin D Feb. 19, 2016, 3:40 p.m. OK GNU C++11 TESTS 66 93 17305600 2200
28783668 fabo3000 D July 22, 2017, 4:58 p.m. OK GNU C++11 TESTS 66 109 2150400 2200
28782842 fabo3000 D July 22, 2017, 4:08 p.m. OK GNU C++11 TESTS 66 109 2150400 2200
40985125 ReaLNero1 D July 30, 2018, 7:46 p.m. OK GNU C++11 TESTS 66 109 17305600 2200
18151512 krz D May 29, 2016, 9:59 p.m. OK GNU C++11 TESTS 66 124 2252800 2200
45075174 Rockett D Oct. 29, 2018, 11:13 p.m. OK GNU C++11 TESTS 66 140 20275200 2200
41635862 m4h D Aug. 15, 2018, 11:51 p.m. OK GNU C++14 TESTS 66 124 102400 2200
58823306 carre D Aug. 14, 2019, 2:49 p.m. OK GNU C++14 TESTS 66 140 0 2200
58823526 carre D Aug. 14, 2019, 2:54 p.m. OK GNU C++14 TESTS 66 155 0 2200
58823050 carre D Aug. 14, 2019, 2:44 p.m. OK GNU C++14 TESTS 66 156 0 2200
45213209 AnishG D Nov. 2, 2018, 4:23 p.m. OK GNU C++14 TESTS 66 171 16384000 2200
31728208 cwhao D Oct. 26, 2017, 4:22 a.m. OK GNU C++14 TESTS 66 171 16384000 2200
27356960 Near_mj D May 26, 2017, 1:55 p.m. OK GNU C++14 TESTS 66 171 16384000 2200
45237484 AnishG D Nov. 3, 2018, 10:04 a.m. OK GNU C++14 TESTS 66 171 16384000 2200
30460193 NiroBC D Sept. 18, 2017, 9:57 a.m. OK GNU C++14 TESTS 66 171 33996800 2200
64708249 baohiep D Nov. 11, 2019, 5:28 p.m. OK GNU C++14 TESTS 66 171 64614400 2200
56545631 fanqeixi D July 5, 2019, 7:30 a.m. OK GNU C++17 TESTS 66 171 16281600 2200
51134040 vjudge4 D March 10, 2019, 3:07 p.m. OK GNU C++17 TESTS 66 171 178176000 2200
47842533 the_nightmare D Jan. 2, 2019, 12:53 p.m. OK GNU C++17 TESTS 66 187 129126400 2200
64745125 AmineBDH D Nov. 12, 2019, 1:16 p.m. OK GNU C++17 TESTS 66 202 64409600 2200
61937629 Rahul D Oct. 5, 2019, 6:23 p.m. OK GNU C++17 TESTS 66 202 67379200 2200
62206576 Hoshi08 D Oct. 9, 2019, 1:23 p.m. OK GNU C++17 TESTS 66 217 32256000 2200
49881584 err0r D Feb. 13, 2019, 6:26 p.m. OK GNU C++17 TESTS 66 217 64307200 2200
65288810 Pety D Nov. 18, 2019, 9:04 a.m. OK GNU C++17 TESTS 66 217 64409600 2200
48685136 IsTiaQue D Jan. 21, 2019, 2:55 p.m. OK GNU C++17 TESTS 66 217 64819200 2200
56789388 dragonslayerintraining D July 10, 2019, 9:52 a.m. OK GNU C++17 TESTS 66 217 80384000 2200
20013033 pavel.rosputko D Aug. 20, 2016, 8:39 p.m. OK Haskell TESTS 66 623 70246400 2200
20012987 pavel.rosputko D Aug. 20, 2016, 8:37 p.m. OK Haskell TESTS 66 623 70246400 2200
20013604 pavel.rosputko D Aug. 20, 2016, 9:12 p.m. OK Haskell TESTS 66 624 70246400 2200
20013579 pavel.rosputko D Aug. 20, 2016, 9:11 p.m. OK Haskell TESTS 66 670 70246400 2200
20012874 pavel.rosputko D Aug. 20, 2016, 8:32 p.m. OK Haskell TESTS 66 810 70246400 2200
16219284 Tron271828 D Feb. 20, 2016, 2:40 a.m. OK Java 7 TESTS 66 670 53043200 2200
16217447 gpita D Feb. 19, 2016, 10:27 p.m. OK Java 7 TESTS 66 873 143564800 2200
16224417 ya_rb D Feb. 20, 2016, 7:27 a.m. OK Java 7 TESTS 66 1481 159436800 2200
16206981 knightL D Feb. 19, 2016, 3:44 p.m. OK Java 7 TESTS 66 1528 142950400 2200
16390060 Wolfje D Feb. 27, 2016, 6:26 p.m. OK Java 8 TESTS 66 421 21504000 2200
16212506 Guliash D Feb. 19, 2016, 5:22 p.m. OK Java 8 TESTS 66 467 0 2200
16207541 Ahmad_Elsagheer D Feb. 19, 2016, 3:51 p.m. OK Java 8 TESTS 66 560 131379200 2200
20205581 WonderMouse D Aug. 28, 2016, 5:19 a.m. OK Java 8 TESTS 66 561 62361600 2200
16281396 ATailouloute D Feb. 22, 2016, 5:30 p.m. OK Java 8 TESTS 66 638 48537600 2200
16225085 Empress D Feb. 20, 2016, 8:17 a.m. OK Java 8 TESTS 66 685 131584000 2200
45538861 Ahmed_Diab D Nov. 10, 2018, 6:23 p.m. OK Java 8 TESTS 66 795 76083200 2200
16225110 Empress D Feb. 20, 2016, 8:19 a.m. OK Java 8 TESTS 66 795 131584000 2200
45539008 Ahmed_Diab D Nov. 10, 2018, 6:26 p.m. OK Java 8 TESTS 66 810 76083200 2200
16296240 Abkreno94 D Feb. 23, 2016, 4:44 p.m. OK Java 8 TESTS 66 810 131891200 2200
16206331 azukun D Feb. 19, 2016, 3:37 p.m. OK MS C# TESTS 66 717 3686400 2200
16226552 toraoh D Feb. 20, 2016, 9:53 a.m. OK MS C# TESTS 66 936 69324800 2200
21780261 balalaika D Oct. 25, 2016, 7:25 p.m. OK MS C# TESTS 66 1746 37068800 2200
21780290 balalaika D Oct. 25, 2016, 7:26 p.m. OK MS C# TESTS 66 1777 37068800 2200
16219337 huantwofat D Feb. 20, 2016, 2:46 a.m. OK MS C++ TESTS 66 187 32256000 2200
16208337 RoKi D Feb. 19, 2016, 4:03 p.m. OK MS C++ TESTS 66 202 64819200 2200
16209414 Ghassan.Khazaal D Feb. 19, 2016, 4:19 p.m. OK MS C++ TESTS 66 264 64204800 2200
34496986 OsamaNabih268 D Jan. 23, 2018, 9:28 p.m. OK MS C++ TESTS 66 295 66457600 2200
17247057 a510756230 D April 9, 2016, 2:09 a.m. OK MS C++ TESTS 66 373 34508800 2200
45228770 vjudge5 D Nov. 3, 2018, 5:36 a.m. OK MS C++ TESTS 66 374 32256000 2200
53031835 vjudge4 D April 20, 2019, 1:47 a.m. OK MS C++ TESTS 66 374 32460800 2200
16212605 AU.Bahosain D Feb. 19, 2016, 5:25 p.m. OK MS C++ TESTS 66 390 32153600 2200
36225264 Andreasyan D March 12, 2018, 1:25 p.m. OK MS C++ TESTS 66 405 34201600 2200
43995831 vjudge2 D Oct. 8, 2018, 11:27 a.m. OK MS C++ TESTS 66 436 130969600 2200
16217719 alexey.shchepin D Feb. 19, 2016, 11:02 p.m. OK Ocaml TESTS 66 1544 131788800 2200
41070132 jooj D July 31, 2018, 11:16 p.m. OK PyPy 2 TESTS 66 389 18329600 2200
41070293 vjudge4 D July 31, 2018, 11:35 p.m. OK PyPy 2 TESTS 66 420 18432000 2200
48362961 IrOty1oX5uSp4 D Jan. 13, 2019, 7:36 p.m. OK PyPy 2 TESTS 66 1107 9216000 2200
48357880 IrOty1oX5uSp4 D Jan. 13, 2019, 5:03 p.m. OK PyPy 2 TESTS 66 1138 9011200 2200
48363940 IrOty1oX5uSp4 D Jan. 13, 2019, 8:11 p.m. OK PyPy 2 TESTS 66 1169 9523200 2200
48363970 IrOty1oX5uSp4 D Jan. 13, 2019, 8:12 p.m. OK PyPy 3 TESTS 66 1075 9625600 2200

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