Problem 312  Discussion Forum
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How many (not necessarily primitive) Heronian triangles with sides a, b and c, and area in the range [10000000,10001000], are there? Answer format: count,∑a_{i},∑b_{i},∑c_{i} where a_{i} ≤ b_{i} ≤ c_{i} Example:26,203,431,520 in the range [0,100] [My timing: <1m]
sinan  6d:14h ago

Hi, Only the area has to be in that range. So it means given an area in that range, you need to find a,b,c if they exist. 
liuguangxi  6d:19h ago

Hi sinan,
Dose the problem mean ONLY area in the range [10000000,10001000] (inclusive), but a,b,c need not in this range？ 
Buri  1y ago

Thanks for the hint ! 
sinan  1y ago

Hi Buri, Pay attention to "in a range". You need to find an algo to deal with it. I have 2 loops and an equation to solve for the 3rd variable. You probably have 3 loops. That may be the reason. 
Buri  1y ago

Hi sinan, is there a special way to solve the problem under 1 minute ?
I only have a methode which takes hours and hours to solve. 
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