projecteuler---->problem=9----Special Pythagorean triplet
title:APythagoreantripletisasetofthreenaturalnumbers,abc,forwhich,a2+b2=c2Forexample,32+42=9+16=25=52.ThereexistsexactlyonePythagoreantripletforwhicha+b+c=1000.Findtheproductabc.翻译:勾股数组就是三个自然数a,b,c:a2