# include<stdio.h>
int main () 
{int BJT,UCT;
 int a=0,b=0;
 scanf("%d",&BJT);
 if(BJT>2359||BJT<0){
 	printf("请输入正确的数字"); 
 }
 else if(BJT<800){
 	a=BJT/100-8+24;
 	b=BJT%100+a*100;
 }
 	else {
	a=BJT/100-8;
 	b=BJT%100+a*100;
 }
 
 printf ("%d",b);
}