#include<stdio.h> int main() { int n,v1,v2,t; float s; while(scanf("%d%d%d%d",&n,&v1,&v2,&t) != EOF) { if(v1 <= 0 && v2 >= 0 && n > 0) printf("%NO\n"); if(v1 <= 0 && v2 <= 0) { if((-v2)*t - (-v1)*t >= n*1000) { s = (n*1000) / (v1-v2); printf("%.2f\n",s); } else printf("NO\n"); } if(v1 > 0 && v2 < 0) { s = (n*1000) / (v1-v2); printf("%.2f\n",s); } else { if(v2*t - v1*t >= n*1000) { s = (n*1000) / (v2-v1); printf("%.2f\n",s); } else printf("NO\n"); } } } |
Double click to view unformatted code.