#include <stdio.h> int main() { int cost; scanf("%d", &cost); if(cost >= 100 && cost < 500) printf("%.1f", cost * 0.9); else if(cost >= 500 && cost < 2000) printf("%.1f", cost * 0.8); else if(cost >= 2000 && cost < 5000) printf("%.1f", cost * 0.7); else printf("%.1f", cost * 0.6); }