/*slower method to find a rectange from a surface*/
function findAllRectanglesBrutForce(area) {
    // let area = 558;
    let a = Math.sqrt(area), maxY = Math.ceil(area / 2) + 1;
    // if area= 18, a= 4.242, but 18=6*3
    let x = Math.floor(a); let y = Math.ceil(a);
    // this a match to return if no match was found
    let bismatched = { x: x, y: y, calc: x * y };
    const result = {
        matched: null,
        allMatched: null,
        matchedBis: bismatched
    };
    // check if already good
    if (x = + a && y == a) {
        result.matched = matched;
    }
    let matched = null;
    let allMatched = [];
    let allMatched_X = [];
    let allMatched_Y = [];
    let xi; let yi;
    xi = x; yi = y;

    console.time('findAllRectanglesBrutForce_' + area);
    if (result.matched == null)
        for (let xi = 2; xi < area; xi++) {
            for (let yi = area; yi > 1; yi--) {
                let calc = xi * yi;
                if (calc == area) {
                    let bx = allMatched_X.indexOf(yi) == -1;
                    let bY = allMatched_Y.indexOf(xi) == -1;
                    if (bx && bY) {
                        allMatched_X.push(xi);
                        allMatched_Y.push(yi);
                        matched = { x: xi, y: yi };
                        allMatched.push(matched);
                    }
                }
            }
        }
    console.timeEnd('findAllRectanglesBrutForce_' + area);
    /**
     *  area 558 = 9.28076171875ms
     * algo0_558: 6.281005859375ms
     */
    result.matched = matched;
    result.allMatched = allMatched;
    result.matchedBis = bismatched;
    return result;
}