// Дана nums = [2, 7, 11, 15], target = 9

// Так как nums[0] + nums[1] = 2 + 7 = 9
// Возвращаем [0, 1]

        let arr = [1,4,8,6,5,3,6,7,0,9], target = 9, newArr = [];
        for (let i = 0; i < arr.length; i++) {
            for (let j = 0; j < arr.length; j++) {
                if (arr[i] + arr[j] == target) {
                        newArr.push(i, j)
                        continue
                }
            }
            
        }
    
        console.log(newArr)