is-sum-of-consecutive2

Find the number of ways to express n as sum of some (at least two) consecutive positive integers.

Example

• For n = 9, the output should be
  isSumOfConsecutive2(n) = 2.

  There are two ways to represent n = 9: 2 + 3 + 4 = 9 and 4 + 5 = 9.

• For n = 8, the output should be
  isSumOfConsecutive2(n) = 0.

  There are no ways to represent n = 8.

Input/Output

• [execution time limit] 4 seconds (js)

• [input] integer n

  A positive integer.

  Guaranteed constraints:
  1 ≤ n ≤ 104.

• [output] integer

[JavaScript (ES6)] Syntax Tips

// Prints help message to the console
// Returns a string
function helloWorld(name) {
    console.log("This prints to the console when you Run Tests");
    return "Hello, " + name;
}