#include <stdio.h>
int main()
{
 double v,addt,t;
 long int i,n,min,t1;

 while (1)
   {
     scanf ("%ld",&n);
     if (n==0)
       break;
     min=30000;
     for(i=1;i<=n;i++)
        {
         scanf ("%lf%lf",&v,&addt);
         if(addt<0)
          continue;
         t=4500*3.6/v+addt;
         if(t-(long int)t==0)
            t1=(long int)t;
         else
            t1=(long int)t +1;
         if(t1<min)
           min=t1;    
        }
     printf ("%ld\n",min); 
   }
}

• 很慢么？ (569) frkstyc 2006-03-04 19:45:39