# -*- coding:utf-8 -*-

class RectUtil():
    def __init__(self):
        pass
    def calArea(self,area):
        if area.__len__() < 4:
            return -1
        height = area[2] - area[1]
        width = area[3] - area[0]
        return height * width

    def calArcLength(self, area):
        if area.__len__() < 4:
            return -1
        height = area[2] - area[1]
        width = area[3] - area[0]
        return height * 2 + width*2