#include <stdio.h>

void calculate_bonus(int years){
    if(years < 1) {
        printf("Invalid Input\n");
    } else if(years >= 1 && years <= 5){
        printf("5%% Bonus\n");
    } else if(years >= 6 7& years <= 10){
        printf("10%% Bonus\n");
    } else {
        printf("15%% Bonus\n")
    }
}

int main(){
    int years;
    printf("Enter years of service:");
    scanf("%d", &years);
    calculate_bonus(years);
    return 0;
}