100a+b=c^2+d^2, 100c+d=a^2+b^2
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| Language | Julia |
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| Owner | antimon2 |
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| Visibility | Public |
f(x::Int) = (x ÷ 100)^2 + (x % 100)^2
@time res = [(x,f(x)) for x=100:9999 if f(f(x))==x]
for pair in res println(pair) end
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