Optym Internship, lesson 3, game description and solutions

description

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

theBestSolution.js

function isSumOfConsecutive2(t) {
    let sum = 0;
    for(let i = 2; i < t; i++)
   {
        let a = 0;
        let temp = 2*t + i*(1-i);
        
        if(temp%(2*i) != 0) continue;

        a = temp/(2*i);

        if(a > 0 && a < t) {
        
            sum++;
       }
   }

    return sum;
}

winners.js

function isSumOfConsecutive2(n) {
 var c = 0;
 var s = 0;
 for (var i=1; i<n; i++) {
  
  for(var j=i; j<n; j++) {
   s+= j;
   if (s==n) {
    c++;
    break;
   }
   if (s>n) {
    break;
   }
  }
  s=0
 }
 return c
}