#include <stdio.h>

int main() {
    int years;
    scanf("%d", &years);
    
    if (years < 1) {
        printf("Invalid Input");
}
else if (years >= 1 && years <= 5) {
    printf("5%%");
}
else if (years >= 6 && years <= 10) {
    printf("10%%");
} 
else {
    printf("15%%")
}

return 0;
}