#include<stdio.h>
int main(){
	int fee;
		printf("please enter your fee:\n");
		scanf("%d",&fee);
			if(fee<500){
				printf("your should pay :%d\n",fee);
			}
			if(fee==1000){
				fee=0.9*%d; 
				printf("your  should pay :%d\n",fee);
			}
			if(fee==2000){
				fee=0.7*2000;
				printf("your should pay :%d\n",fee);
			}
			if(fee==3000){
				fee=0.6*3000;
				printf("your should pay :%d\n",fee);
			}
					return 0;
		}