#include <stdio.h>
void main()
{
double p,w,s,d,f;
      scanf("%f",&s);   
           if(s<250)
           {
               d=0;
           printf("总运费为f=p*w*s*(1-%f)",d);
           }
             else if(250<=s&&s<500)
             {
                 d=0.02;
           printf("总运费为f=p*w*s(1-%f)",d);
             }
           else if(500<=s&&s<1000)
           {
               d=0.05;
           printf("总运费为f=p*w*s*(1-%f)",d);
           }
           else if(1000<=s&&s<2000)
           {
               d=0.08;
           printf("总运费为f=p*w*s*%f",1-d);
           }
           else if(2000<=s&&s<3000)
           {
               d=0.1;
           printf("总运费为f=p*w*s(1-%f)",d);
           }
           else
           {
               d=0.15;
           printf("总运费为f=p*w*s*(1-%f)",d);

           }
}