/*
*???  9_cpp
*??    ???
*??    2012?9?29?
*???  ????? 
*/
int main()
{
    // ???????i????????
    unsigned int a[101], i, age1=0, age2=0, age3=0, age4=0;    
    double p1, p2, p3, p4, n;            // ????????????????                          
    cin >> n; 
    for(i= 1; i <= n; i++)                  
    {        
         cin >> a[i];                     // ???????? 
         if(a[i] >= 1 && a[i] <= 18)      // ????????????????????? 
         {
             age1++; 
         }
         else if(a[i] > 18 && a[i] <= 35) // ????????????????????? 
         {
             age2++;
         }
         else if(a[i] > 35 && a[i] <= 60) // ????????????????????? 
         {
             age3++;
         }
         else                             // ????????????????????? 
         {
             age4++;
         }
    }          
    p1 = age1 / n;                        // ??????????????? 
    p2 = age2 / n;
    p3 = age3 / n;
    p4 = age4 / n;
    printf("1-18: %.2f%%\n", p1 * 100);   // ?????????????? 
    printf("19-35: %.2f%%\n", p2 * 100); 
    printf("36-60: %.2f%%\n", p3 * 100); 
    printf("60??: %.2f%%\n", p4 * 100);
    return 0;
}