View Code of Problem 104

#include<stdio.h>
#include<math.h>

int main()
{
    float n,v1,v2,t;
    float s;
    while(scanf("%f%f%f%f",&n,&v1,&v2,&t) != EOF)
    {
        if(n == 0)
            printf("0.00\n");
        else
        {
            if(v1 <= v2)
                printf("NO\n");
            else
            {
                s = (n*1000) / (v1-v2);
                if(s <= t)
                {
                    
                    printf("%.2f\n",s);
                }
                else
                    printf("NO\n");
            }
        }

    }
    return 0;
}