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 }