-- Lua

function gcd(a, b)
    if b > 0 then
        return gcd(b, a % b);
    else
        return a;
    end
end

print("test");

N = 1000;
A = {};
for i = 1, N do
    A[i] = i - 1;
end

ans = 0;
for _, i in ipairs(A) do
    for _, j in ipairs(A) do
        ans = gcd(i, j) + ans;
    end
end
print(ans);