    int main () {
    int i,f;
    double b,c,d,e;
    int w=0,x=0,y=0,z=0;
    int age[100];
	scanf("%d",&f);
    for(i=0;i<f;i++){
    scanf("%d",&(age[i]));}
    for(i=0;i<f;i++){
    if(age[i]<19&&0<age[i]){
    w=w+1;}
    if(age[i]<36&&18<age[i]){
    x=x+1;}
    if(age[i]<61&&35<age[i]){
    y=y+1;}
    if(age[i]>60){
    z=z+1;}}
    b=1.0*w/f*100;
    c=1.0*x/f*100;
    d=1.0*y/f*100;
    e=1.0*z/f*100;
    printf("1-18: %.2lf%\n19-35: %.2lf%\n36-60: %.2lf%\n60??: %.2lf%",b,c,d,e);
    return 0;
}