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;
}