function avoidObstacles(nums) {
    //  write code here.
    nums.sort((a, b) => {
        return a - b;
    });
    const lastArrVal = nums[nums.length  - 1];
    console.log(lastArrVal);
    
    for(let i = 1; i <= lastArrVal + 1; i++){console.log(i)
        
        if(nums.every((el)=>{
            return el % i !=0;
        })){
            return i;
        }
    }
    

}

/**
* Test Suite 
*/
describe('avoidObstacles()', () => {
    it('returns minimal number of jumps in between numbers', () => {
        // arrange
        const nums = [5, 3, 6, 7, 9];
        
        // act
        const result = avoidObstacles(nums);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(4);
    });
});