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I need to cаlculate sum of torques about axes, right. T = ∑F·d = 0, where T is torque, F is vector of force, d is distance from F to center of sphere. Is it right? It seems that this problem very simple. Let F=[v1,F1]+...+[vN,FN]- sum of moments of forces, where vi=(cos(fi)cos(hi),cos(fi)sin(fi),sin(fi))- vector of point and Fi=(cos(qi)cos(zi),cos(qi)sin(zi),sin(qi))- vector of force Fi. Let V,G- point and force to be found. Then we have [V,G]=-F,|G|->min; We must have V- is normal to F=>V any point on meridian and G=-[V,F]-calculated after Thus solution ambiguous even with demand |G|->min And why do you think that this problem must have an unique answer? Any correct answer will be OK. Because when many solutions how can we check that difference with test's answer <=1E-8 This problem has special checking program. It doesn't use the difference between your answer and jury's one. Everything needed to solve this problem is told in the first post! And there is only simple 3D-geometry. int russian variant of statement word "engine" in line: "Next line of input contains krypton engine description" is written twice Далее идет информация о работающих криптоновых двигателях двигателях 1 What is the precision of the output required in this problem? There are 8 digits in the text, but only 2 digits in the sample output. 2 It's not clear if it is possible to use the jet thrust less than 1 or more than 100000? Edited by author 06.10.2005 04:46 Edited by author 14.10.2005 12:02 1. 270.00 is equal to 270.00000000. Are you agree? 2. Don't worry about it. I think the sample of this problem is incorrect. My AC program outputs: 0.00000000 0.00000000 270.00000000 0.00000000 156.50000000, but sample output is oposite to this P.S. sorry for my poor English.. It seems, you are right. Probably, misprint. First number in the sample output was replaced by "0.00" |
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