View Code of Problem 104

#include<stdio.h>
#include<math.h>
void main()
{
	float n,v1,v2,t;
	while(scanf("%f%f%f%f",&n,&v1,&v2,&t)!=EOF){
	if(v2>=v1)
		printf("NO\n");
	else
		n*1000/(v1-v2)<=t?printf("%.2f\n",n*1000/(v1-v2)):printf("NO\n");
	}
}