#include <stdio.h>
void main ()
{
    float d,t;
    scanf("%f %f", &d,&t);
    if(d>-1000.0 || d<1000.0 && t>0.0 || t<24.00){
        printf("Invalid input");
    }
    else(){
        speed = distance/time
        printf("d/n")
    }
}