杭电OJ（HDOJ）1030题：Delta-wave

题意：

示例输入：

#include<stdio.h>
#include<math.h>
int main()
{
    int a,b;
    int aX,aY,bX,bY,aLayer,bLayer,step;
    while(scanf("%d%d",&a,&b)!=EOF)
    {
        aLayer=ceil(sqrt((double)a));//求出数a所在层
        bLayer=ceil(sqrt((double)b));//求出数b所在层
        if(aLayer==bLayer)  printf("%d\n",abs(a-b));
        else
            {
                aX=(aLayer*aLayer-a)/2;//计算a的X坐标
                bX=(bLayer*bLayer-b)/2;//计算b的X坐标
                aY=(a-(aLayer*aLayer-2*aLayer+2))/2;//计算a的Y坐标
                bY=(b-(bLayer*bLayer-2*bLayer+2))/2;//计算b的Y坐标
                step=abs(aX-bX)+abs(aY-bY)+abs(aLayer-bLayer);
                printf("%d\n",step);//求出最终步骤
            }
    }
}