http://poj.org/problem?id=2420 //* @author: ccQ.SuperSupper import java.io.*; import java.util.*; import java.math.*; class Point{ double x,y; } public class Main { static int n; static final int N = 100+10; static Point point[] = new Point[N]; static void start(){ for(int i=0;i< N;++i) point[i] = new Point(); } public static void main(String[]args) throws Exception{ int i; double min; StreamTokenizer cin = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in))); start(); while(true){ cin.nextToken(); n = (int)cin.nval; if(n<=0) break; for(i=0;i< n;++i){ cin.nextToken(); point[i].x = cin.nval; cin.nextToken(); point[i].y = cin.nval; } min = best(point[n/2].x,point[n/2].y,n); System.out.printf("%.0fn", min); } } static double f(double a,double b,double n){ int i; double t = 0; for(i=0;i< n;++i){ t+=Math.sqrt((point[i].xa)*(point[i].xa)+(point[i].yb)*(point[i].yb)); } return t; } static double best(double a,double b,int n){ int i,j=0,w=0; double T[] = new double[4],min; T[0] = f(a,b+1,n); T[1] = f(a+1,b,n); T[2] = f(a1,b,n); T[3] = f(a,b1,n); min = f(a,b,n); for(i=0;i< 4;++i){ if(T[i]< min){ w = 1; j = i; min = T[i]; } } if(w!=0){ if(j==0) min = best(a,b+1,n); else if(j==1) min = best(a+1,b,n); else if(j==2) min = best(a1,b,n); else if(j==3) min = best(a,b1,n); } return min; } }
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