Area
大意：每次给你一个点的横纵坐标变化值，求有多少点在多边形上，有多少点在多边形内，和多边形的面积。
< http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+Csu8wrejulBpY2u2qMDtoaM8L3A+CjxwPgrSu7j2vMbL47Xj1fPW0LaltePU2iYjMjY2ODQ7tePJz7XEtuCx39DOw+a7/bmryr2julM9YSYjNDM7YqHCMi0xo6zG5NbQYbHtyr624LHf0M7E2rK/tcS148r9o6xise3Kvrbgsd/QzrHfvefJz7XEtePK/aOsc7Htyr624LHf0M61xMPmu/2hozwvcD4KPHA+Cjxicj4KPC9wPgo8cD4KPC9wPgo8cHJlIGNsYXNzPQ=="brush:java;">#include