#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

void main(int argc, char *argv[]) {
	int a[10];
	int i,n,y;
	double s;
	s=0;
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%d",&a[i]);
	}
	for(i=0;i<n;i++){
		s=s+a[i];
		
	}

	for(i=0;i<n;i++){ 
	  if(s>100&&a[i]==a[n-1])
			printf("%.2f",(s-100)*0.9+100);
	}
	}

/**************************************************************
	Problem: 1160
	User: admin
	Language: C
	Result: Accepted
	Time:9 ms
	Memory:1144 kb
****************************************************************/