#include <stdio.h>
int main() {
	float price;
	printf("請輸入價格:");
	scanf("%f", &price);
	float d;
	if(price>0 && price<=1000){
		d=1.0;
	} else if(price>1000 && price<=2000){
		d=0.9;
	} else if(price>2000 && price<=5000){
		d=0.85;
	} else if(price>5000){
		d=0.8;
	} else{
		printf("錯誤!\n");
		d=0.0;
	}
	price*=d;
	printf("折扣後價格為%d\n",(int)price);
	return 0;
}