task1.java

/**
 * Created by crised on 09-11-15.
 */
public class Solution {


    public Solution() {
        int K = -4, L = 1, M = 2, N = 6, P = 0, Q = -1, R = 4, S = 3;
        System.out.println(solution(K, L, M, N, P, Q, R, S));
    }

    public int solution(int K, int L, int M, int N, int P, int Q, int R, int S) {

        //x,y sides of intersected rectangle
        int x = Math.min(M, R) - Math.max(K, P);
        int y = Math.min(N, S) - Math.max(L, Q);

        long inter = 0;

        if (x >= 0 && y >= 0) inter = x * y;

        long A1 = Math.abs((M - K) * (N - L));
        long A2 = Math.abs((R - P) * (S - Q));

        long sol = A1 + A2 - inter;
        if (sol <= Integer.MAX_VALUE) return (int) sol;
        return -1;

    }
}