#include <stdio.h>
#include <stdlib.h>

int main()
{
    float sum=0;
    int n,i,studenti=0,baieti=0,fete=0,v;
    unsigned long long cnp;
    printf("n=");
    scanf("%d",&n);
    printf("Primul cnp:");
    scanf("%I64u",&cnp);
    v=2015-(1900+cnp/10000000000%100);
   // printf("varsta:%d",v);
   // printf("cnp:%d",cnp/10000000000%100);
    if(v<=99 && v>=18) {
        sum=sum+v;
        if(cnp/1000000000000==1){
            baieti++;
            studenti++;
        }
        if(cnp/1000000000000==2) {
            fete++;
            studenti++;
        }
    }
    for(i=2;i<=n;i++){
        printf("Al %d-lea cnp:",i);
        scanf("%I64u",&cnp);
        v=2015-(1900+cnp/10000000000%100);
        if(v<=99 && v>=18) {
            sum=sum+v;
            if(cnp/1000000000000==1){
                baieti++;
                studenti++;
            }
            if(cnp/1000000000000==2) {
                fete++;
                studenti++;
            }
        }
    }
    printf("Numarul studentilor:%d\n",studenti );
    printf("Numarul baietilor:%d\n",baieti );
    printf("Numarul fetelor:%d\n",fete );
    printf("Varsta medie:%.1f",sum/studenti);
    return 0;
}