UVALive 2145 Lost in Space（暴力）

　　题目并不难，就是暴力，需要注意一下输出形式和精度。

#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
#define maxn 100
#define jd 0.0001
double x[maxn],y[maxn],z[maxn],d,e,f;
double getdis(double x,double y,double z,double x1,double y1,double z1)
{
    return sqrt((x1-x)*(x1-x) + (y1-y)*(y1-y) + (z1-z)*(z1-z));
}
bool Judge(double a,double b,double c)
{
    double ra1 = a/d;
    double ra2 = b/e;
    double ra3 = c/f;
    if(fabs(ra1-ra2)<jd && fabs(ra1-ra3)<jd && fabs(ra2-ra3)<jd) return true;
    return false;
}
int P,Q,R;
bool Solve(double ij,double jk,double ik,int i,int j,int k)
{
    if(Judge(ij,jk,ik)) {P = k; Q = i; R = j; return true;}
    if(Judge(ik,jk,ij)) {P = j; Q = i; R = k; return true;}
    if(Judge(ij,ik,jk)) {P = k; Q = j; R = i; return true;}
    if(Judge(jk,ik,ij)) {P = i; Q = j; R = k; return true;}
    if(Judge(ik,ij,jk)) {P = j; Q = k; R = i; return true;}
    if(Judge(jk,ij,ik)) {P = i; Q = k; R = j; return true;}
    return false;
}
int main()
{
    int t,n;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%lf%lf%lf",&d,&e,&f);
        scanf("%d",&n);
        for(int i = 1; i <= n; i++)
        {
            scanf("%lf%lf%lf",&x[i],&y[i],&z[i]);
        }
        int ans,tmp;
        for(int i = 1; i <= n; i++)
        {
            for(int j = i+1; j <= n; j++)
            {
                for(int k = j+1; k <= n; k++)
                {
                    double ij = getdis(x[i],y[i],z[i],x[j],y[j],z[j]);
                    double jk = getdis(x[j],y[j],z[j],x[k],y[k],z[k]);
                    double ik = getdis(x[i],y[i],z[i],x[k],y[k],z[k]);
                    if(Solve(ij,jk,ik,i,j,k) == true)
                    {
                        printf("%d %d %d\n",P,Q,R);
                    }
                }
            }
        }
    }
    return 0;
}