1.7 KiB
1.7 KiB
id | challengeType | title | forumTopicId | localeTitle |
---|---|---|---|---|
5900f3711000cf542c50fe84 | 5 | Problem 5: Smallest multiple | 302160 | Проблема 5: Наименьшая множественность |
Description
n
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Instructions
Tests
tests:
- text: <code>smallestMult(5)</code> should return 60.
testString: assert.strictEqual(smallestMult(5), 60);
- text: <code>smallestMult(7)</code> should return 420.
testString: assert.strictEqual(smallestMult(7), 420);
- text: <code>smallestMult(10)</code> should return 2520.
testString: assert.strictEqual(smallestMult(10), 2520);
- text: <code>smallestMult(13)</code> should return 360360.
testString: assert.strictEqual(smallestMult(13), 360360);
- text: <code>smallestMult(20)</code> should return 232792560.
testString: assert.strictEqual(smallestMult(20), 232792560);
Challenge Seed
function smallestMult(n) {
// Good luck!
return true;
}
smallestMult(20);
Solution
function smallestMult(n){
function gcd(a, b) {
return b === 0 ? a : gcd(b, a%b); // Euclidean algorithm
}
function lcm(a, b) {
return a * b / gcd(a, b);
}
var result = 1;
for(var i = 2; i <= n; i++) {
result = lcm(result, i);
}
return result;
}