223.Rectangel Area

 public int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) {
        int innerL = Math.max(A,E);
        int innerR = Math.max(innerL,Math.min(C,G));
        int innerB = Math.max(B,F);
        int innerT = Math.max(innerB,Math.min(D,H));

        return (C-A)*(D-B) - (innerR-innerL)*(innerT-innerB) + (G-E)*(H-F);
    }