#include <stdio.h>

int main(void){
    int i, N, sum = 0, k = 0;
    scanf("%d", &N);
    int c[N];
    for(i=0;i<N;i++){
        scanf("%d", &c[i]);
        sum += c[i];
    }
    sum /= 10;
    for(i=0;i<N;i++){
    	if(c[i]<=sum){
    		k += 30;
    	}
    }
    printf("%d\n", k);
    return 0;
}