#include<stdio.h>
int main(void){
int N, C[100];
int i, goukei = 0,j = 0;
scanf ("%d", &N);
for ( i = 0; i < N; i++){
	scanf ("%d",&C[i]);
	goukei += C[i];
}
goukei /= 10;
for ( i = 0; i < N; i++){
	if ( C[i] <= goukei)
		j += 30;
}
printf ("%d", j);

	return 0;
}