function largestRectangle(h) {
    let biggest = 0;
    for (let i = 0; i < h.length; i++) {
        let minHeight = h[i];
        for (let j = i; j < h.length; j++) {
            minHeight = Math.min(minHeight, h[j]);
            let area = minHeight * (j - i + 1); 
            biggest = Math.max(biggest, area); 
        }
    }
    return biggest;
}