View Code of Problem 104

#include <stdio.h>
int main(){
	int s1,s2,n,v1,v2,t;
	float  k,v,tt;	
	scanf("%d",&n);
	k=n*1000;
	scanf("%d %d",&v1,&v2);	
	scanf("%d",&t);
	s1=v1*t;
	s2=k+v2*t;
	if(s1<s2) printf("NO");
	else {
		v=v1-v2;
		tt= k/v;
		printf("%.2f",tt);
	}
	
	return 0;
}