1.4 KiB
1.4 KiB
id | challengeType | title | videoUrl | localeTitle |
---|---|---|---|---|
5900f5431000cf542c510056 | 5 | Problem 471: Triangle inscribed in ellipse | 问题471:以椭圆形刻的三角形 |
Description
设$ G(n)= \ sum {a = 3} ^ n \ sum {b = 1} ^ {\ lfloor \ frac {a - 1} 2 \ rfloor} r(a,b)$给你G( 10)= 20.59722222,G(100)= 19223.60980(舍入为10位有效数字)。找到G(1011)。以科学计数法给出答案四舍五入到10位有效数字。使用小写e分隔尾数和指数。对于G(10),答案应该是2.059722222e1。
Instructions
Tests
tests:
- text: <code>euler471()</code>应返回1.895093981e + 31。
testString: 'assert.strictEqual(euler471(), 1.895093981e+31, "<code>euler471()</code> should return 1.895093981e+31.");'
Challenge Seed
function euler471() {
// Good luck!
return true;
}
euler471();
Solution
// solution required