#include <stdio.h>
int main(){
	int all;
	scanf("%d",&all);
	int layer[all];
	
	int time=0,max=0,ret=all;
	
	int i,t;
	
	for(i=0;i<all;i++){
		scanf("%d",&layer[i]);
		for(t=0;t<i;t++){
			if(layer[t]==layer[i]){
				ret--;
				break;
			}
		}
		if(layer[i]>max){
			max=layer[i];
			
		}
	}
	time=(max*10+all);
	time+=(ret*5);
	printf("%d\n",time);
}