杭电2073

#include<stdio.h>
#include<math.h>
int main()
{
    int n,i,t;
    double x1,y1,x2,y2,s;
    while(~scanf("%d",&n))
    {
        while(n--)
        {
            scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2);
            if(x2+y2 < x1+y1)
            {
                t=x1;
                x1=x2;
                x2=t;
                t=y1;
                y1=y2;
                y2=t;
            }
            t=0;
            if(x1)
            {
                y1+=x1;
                t-=x1;
                x1=0;
            }
            if(y2)
            {
                x2+=y2;
                t-=y2;
                y2=0;
            }
            for(i=y1,s=0; i<x2; ++i)
                s+=sqrt(i*i+(i+1)*(i+1));
            for(i=y1; i<=x2; ++i)
                t+=i;
            s+=t*sqrt(2);
            printf("%.3lf
",s);
        }
    }
}

#include<stdio.h>
#include<math.h>
int main()
{
    int n,i,t;
    double x1,y1,x2,y2,s;
    while(~scanf("%d",&n))
    {
        while(n--)
        {
            scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2);
            if(x2+y2 < x1+y1)
            {
                t=x1;
                x1=x2;
                x2=t;
                t=y1;
                y1=y2;
                y2=t;
            }
            t=0;
            if(x1)
            {
                y1+=x1;
                t-=x1;
                x1=0;
            }
            if(y2)
            {
                x2+=y2;
                t-=y2;
                y2=0;
            }
            for(i=y1,s=0; i<x2; ++i)
                s+=sqrt(i*i+(i+1)*(i+1));
            for(i=y1; i<=x2; ++i)
                t+=i;
            s+=t*sqrt(2);
            printf("%.3lf
",s);
        }
    }
}