#include  <stdio.h>

/*int main() {
int ilosc, x;
scanf ("%d", &ilosc);
for(x = 0; x < ilosc; x++){
    printf ("-");}



}

int main() {
int n, s = 0, x = 0, l = 0;
scanf ("%d", &n);
for (x ;x < n; x++){
    scanf ("%d", &l);
    if (!(l % 3)) {
        s+=1;
    }
}
printf ("%d", s);

}
*/

/*int main(){
int a, b;
for (b = 0; b < 10;){
    scanf ("%d", &a);
    if (a < 0){
        b++;
    }
    }
}
*/