# 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%%\n");
        }
    else if (years > 10) {
    printf("15%%"\n{});}
    return 0;
}