function solve(arr) {

    arr.sort((a, b) => a - b);

    let index = arr.length / 2;

    let arrOfSmall = arr.slice(0, index);

    let arrOfBig = arr.slice(index).sort((a, b) => b - a);

    let arr2 = [];

    for (let i = 0; i < arrOfBig.length; i++) {

        arr2.push(arrOfSmall[i], arrOfBig[i]);

    }


    return arr2;

}