--- id: 5900f5171000cf542c510029 challengeType: 5 title: 'Problem 426: Box-ball system' videoUrl: '' localeTitle: '' --- ## Description undefined ## Instructions undefined ## Tests ```yml tests: - text: '' testString: 'assert.strictEqual(euler426(), 31591886008, "euler426() should return 31591886008.");' ``` ## Challenge Seed ```js function euler426() { // Good luck! return true; } euler426(); ``` ## Solution ```js // solution required ```
euler426()