function compareNumbers(a, b) {
        return a - b;
    }
    const data = input.split(/[\n]/g);
    const n = data[0],
    x = data[1].match(/\d+(?:\.\d+)?/g).map(Number),
    y= data[2].match(/\d+(?:\.\d+)?/g).map(Number);
    let sorted_x = [...x], sorted_y = [...y];
    sorted_x.sort(compareNumbers);
    sorted_y.sort(compareNumbers);
    let d = 0;
    for(let i = 0; i < n; i++) {
         d += Math.pow((sorted_x.indexOf(x[i]) - sorted_y.indexOf(y[i])), 2); 
    }
    let ans = 1 - ((6 * d) / (n * (Math.pow(n, 2) - 1)));
    console.log(ans.toFixed(3));