View Code of Problem 104

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
int main() {
	int n,v1,v2,t;
	while(scanf("%d%d%d%d",&n,&v1,&v2,&t)!=EOF)
	{
		float time=(n*1000.0)/(v1-v2);
		if(time<=t&&time>=0)
		{
			printf("%.2f\n",time);
		}
		else
		{
			
			printf("NO\n");
		}
		
	}
	return 0;
}