int main(){
double a,b,c,d;
a=0;
b=0;
c=0;
d=0;
int i,n;
scanf("%d",&n);
int e[n];
for(i=1;i<=n;i++){
    scanf("%d",&(e[i]));
    if((e[i])>=1 && (e[i])<=18){
        a=a+1;
    }else if((e[i])>=19 && (e[i])<=35){
        b=b+1;
    }else if((e[i])>=36 && (e[i])<=60){
        c=c+1;
    }else if((e[i])>60){
        d=d+1;
    }
}
    a=100.0*a/n;
    b=100.0*b/n;
    c=100.0*c/n;
    d=100.0*d/n;
    printf("1-18: %.2lf%%\n19-35: %.2lf%%\n36-60: %.2lf%%\n60??: %.2lf%%",a,b,c,d);
    return 0;
}


