11 lines
316 B
JavaScript
11 lines
316 B
JavaScript
function solution(common) {
|
|
var _a = [common[0], common[1], common[2]], a = _a[0], b = _a[1], c = _a[2];
|
|
var len = common.length;
|
|
if (a + c === 2 * b)
|
|
return common[len - 1] + (b - a);
|
|
else
|
|
return common[len - 1] * (b / a);
|
|
}
|
|
var common = [1, 2, 3, 4];
|
|
console.log(solution(common));
|