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ishandutta2007/jusliatest.jl

Created January 19, 2023 11:17
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jusliatest.jl
function g(n, s)
n ≤ s && return n == s
for i in 1:ndigits(n)-1
g(n % 10^i, s - n ÷ 10^i) && return true
end
false
end
T(N) = sum(n^2 for n in 2:isqrt(N) if g(n^2, n))
@show @time T(10^12)
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