UvaOJ 10167

 1 #include<cstdio>
 2 
 3 struct node
 4 {
 5     int x;
 6     int y;
 7 }s[10000];
 8 int main()
 9 {
10     //freopen("input.txt","r",stdin);
11     int a,b,n,num;
12     int i;
13     bool flag;
14     while(scanf("%d",&n) && n)
15     {
16         for(i = 0; i < 2 * n; i++)
17             scanf("%d%d",&s[i].x,&s[i].y);
18         flag = 0;
19         for(a = -500 ; a <= 500; a++)
20         {
21             for(b = -500; b <= 500; b++)
22             {
23                 num = 0;
24                 if(a == 0 && b == 0) continue;
25                 for(i = 0; i < 2 * n; i++)
26                 {
27                     if(a * s[i].x + b * s[i].y > 0) num++;
28                     if(a * s[i].x + b * s[i].y == 0) break;
29                 }
30                 if(i == 2 * n && num == n)
31                 {
32                     flag = 1;
33                     break;
34                 }
35             }
36             if(flag) break;
37         }
38         printf("%d %d\n",a,b);
39     }
40 
41     return 0;
42 }