南阳1071

 1 #include<stdio.h>
 2 int main()
 3 {
 4     int a,b;
 5     while(~scanf("%d%d",&a,&b))
 6     {
 7         if(a*b)
 8         {
 9             printf("Signs are ");
10             if((a>>31)^(b>>31))
11                 puts("opposite");
12             else
13                 puts("not opposot");
14         }
15         else
16             puts("Signs can‘t be sure");
17     }
18 }
19