847 B
847 B
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5900f4181000cf542c50ff2a | Problem 171: Finding numbers for which the sum of the squares of the digits is a square | 5 | 301806 | problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square |
--description--
For a positive integer n, let f(n) be the sum of the squares of the digits (in base 10) of n, e.g.
f(3) = 32 = 9,
f(25) = 22 + 52 = 4 + 25 = 29,
f(442) = 42 + 42 + 22 = 16 + 16 + 4 = 36
Find the last nine digits of the sum of all n, 0 < n < 1020, such that f(n) is a perfect square.
--hints--
euler171()
should return 142989277.
assert.strictEqual(euler171(), 142989277);
--seed--
--seed-contents--
function euler171() {
return true;
}
euler171();
--solutions--
// solution required