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Обсуждение задачи 2054. АстрономияSpBerkut Some tests for you guys // Задача 2054. Астрономия 18 июл 2022 16:00 89 2 12 apr 17 21 jun 2 8.4874959390 22.5720084367 ----- 15.7 3 1 apr 13 21 dec 8 12 oct 17 70.5459180884 19.4871801373 10.3882860539 ----- -71 3 25 feb 5 3 aug 15 6 oct 10 3.6840008337 0.0000000000 22.5788661148 ----- 13.5 6 1 jan 15 1 mar 15 1 may 15 1 jul 15 1 sep 15 1 nov 15 33.5814351330 41.8302148985 44.0959307671 47.1958719101 46.8042204476 34.9899114970 ----- Shen Yang I'm so regretful that my primary geometry didn't learn well [7] // Задача 2054. Астрономия 15 окт 2017 22:09 rt Edited by author 15.10.2017 22:10 Mahilewets Nikita [BSUIR] Re: I'm so regretful that my primary geometry didn't learn well [6] // Задача 2054. Астрономия 15 окт 2017 22:11 What is your education? Shen Yang Re: I'm so regretful that my primary geometry didn't learn well [5] // Задача 2054. Астрономия 15 окт 2017 22:14 sorry it is Geography not geometry,tying error(I'm also regretful for my English) obviously this is a geography problem... I was graduate from Sichuan University, I'm Science Students not Arts students in our country Geography is Liberal arts subject,not sicence some years ago Edited by author 15.10.2017 22:15 Edited by author 15.10.2017 22:18 Shen Yang Re: I'm so regretful that my primary geometry didn't learn well [4] // Задача 2054. Астрономия 15 окт 2017 23:05 What I'm not understand is for example it is 12'o clock at noon on summer soltice the same place at the same time :i.e. 12' clock at noon, isn't it opposite to the sun on winter soltice??? so it should be midnight??? I got dizzy with geography+3D geometry... so does it means the peroid of earch rotation is 365*24/366 hours??? Edited by author 15.10.2017 23:07 Edited by author 15.10.2017 23:52 Edited by author 15.10.2017 23:52 Shen Yang Re: I'm so regretful that my primary geometry didn't learn well [3] // Задача 2054. Астрономия 16 окт 2017 19:27 YES, Accepted!!!! I worked at least for two days of this problem finally ac!!!! I have searched for many geography concept which I didn't clear Edited by author 16.10.2017 19:31 Edited by author 16.10.2017 19:31 Mahilewets Nikita Re: I'm so regretful that my primary geometry didn't learn well [2] // Задача 2054. Астрономия 16 окт 2017 20:14 Are you scientist or something like this? Mahilewets Nikita Re: I'm so regretful that my primary geometry didn't learn well // Задача 2054. Астрономия 16 окт 2017 20:15 I saw here one chinese guy who solved the problems to sharpen his mind and now he is a researcher Shen Yang Re: I'm so regretful that my primary geometry didn't learn well // Задача 2054. Астрономия 17 окт 2017 07:26 No I'm not scientist,just solve hard problems for fun itanium What is the kind of 1st test? // Задача 2054. Астрономия 7 дек 2015 16:26 My answers are fully identical to the given one. But I have WA#1. Maybe, are there some format-specified features? Al.Cash Answers a bit off [4] // Задача 2054. Астрономия 10 май 2015 17:30 For some reason I get answers that are very close but not equal to the ones in example: 14.495347194 0.000000000 56.489368526 Maybe I misunderstood something in the model? bsu.mmf.team Re: Answers a bit off [3] // Задача 2054. Астрономия 11 май 2015 14:02 There's no any day of year where you can get such answers with latitude = 56. Only if the time differs about 15-20 seconds from the time of original test data. So it seems you choose slightly different Vasya's location because of wrong time calculation. Or maybe the proximity to the correct answers is just a coincidence, and your Earth-moving model is totally wrong. What answer do you get for the test 56 24 21 jun 0 21 jun 1 ... 21 jun 23 ? Al.Cash Re: Answers a bit off [2] // Задача 2054. Астрономия 11 май 2015 16:07 At least they are symmetric and reach maximum at 12 hours... Could you please post the correct coordinates for 0 and 12 hours and I'll go from there. 0.000000000 0.000000000 0.000000000 0.000000000 4.214527110 11.374704540 19.267892795 27.563494585 35.903413441 43.838560055 50.725478497 55.623901463 57.439281000 55.623901463 50.725478497 43.838560055 35.903413441 27.563494585 19.267892795 11.374704540 4.214527110 0.000000000 0.000000000 0.000000000 Edited by author 11.05.2015 16:35 Edited by author 11.05.2015 16:47 bsu.mmf.team Re: Answers a bit off [1] // Задача 2054. Астрономия 11 май 2015 20:06 Wow, they're again very close to my answers. Here they are: 0 0 0 0 4.2133420379 11.3735281948 19.2668088249 27.5625655432 35.9026841855 43.8380585719 50.7252091429 55.6238233024 57.4392810000 (totally correct :)) 55.6238233024 50.7252091429 43.8380585719 35.9026841855 27.5625655432 19.2668088249 11.3735281948 4.2133420379 0 0 0 I have no idea what exactly it could be, because any misunderstanding of the model would cause much greater error in the answers. Check the constants you use. Maybe one of them has little inaccuracy or doesn't have enough precision. Al.Cash Re: Answers a bit off // Задача 2054. Астрономия 12 май 2015 17:55 Found my mistakes. I handled rotation around Earth's axis totally wrong. First, its period is not 24 hours but a little shorter. Second, the fact about closest meridian at midday doesn't imply that Vasya's location is the closest point to the Sun at his latitude.
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