> 我一开始设成50就wa，设成200就ac了
> #include<iostream>
> #include<math.h>
> #define MAX 200
> using namespace std;
> struct color
> {
> 	int red;
> 	int blue;
> 	int green;
> };
> int main()
> {
> 	int r,b,g;
> 	color c[MAX];
> 	for(int i=0;i<16;i++)
> 	{
> 		cin>>c[i].red>>c[i].blue>>c[i].green;
> 	}
> 	while(cin>>r>>b>>g)
> 	{
> 		if(r==-1&&b==-1&&g==-1)
> 			break;
> 		int min=1<<20;
> 		int flag=0;
> 		for(int i=0;i<20;i++)
> 		{
> 			int length = sqrt(pow((r-c[i].red)*1.0,2)+pow((b-c[i].blue)*1.0,2)+pow((g-c[i].green)*1.0,2));
> 			if(length<min)
> 			{
> 				min = length;
> 				flag = i;
> 			}
> 		}
> 		cout<<"("<<r<<","<<b<<","<<g<<") maps to ("<<c[flag].red<<","<<c[flag].blue<<","<<c[flag].green<<")"<<endl;
> 		
> 
> 	}
> 	return 0;
> 
> }