--- id: 5900f43a1000cf542c50ff4d challengeType: 5 title: 'Problem 206: Concealed Square' videoUrl: '' localeTitle: 问题206:隐藏的广场 --- ## Description 找到唯一的正整数,其正方形的形式为1_2_3_4_5_6_7_8_9_0,其中每个“_”是一个数字。 ## Instructions ## Tests ```yml tests: - text: euler206()应该返回1389019170。 testString: 'assert.strictEqual(euler206(), 1389019170, "euler206() should return 1389019170.");' ``` ## Challenge Seed ```js function euler206() { // Good luck! return true; } euler206(); ``` ## Solution ```js // solution required ```
euler206()