import json


def load_vacancies(filepath: str) -> list[dict]:
    try:
        with open(filepath,"r") as file:
            return json.load(file)
    except:
        print()    
        return []

def filter_by_city(vacancies: list[dict], city: str) -> list[dict]:
    return [i for i in vacancies if i.get('city').lower() == city.lower()]
def filter_by_skills(vacancies: list[dict], required_skills: list[str]) -> list[dict]:
    return []
def filter_by_salary(vacancies: list[dict], min_salary: int) -> list[dict]:
    return []
def extract_unique_companies(vacancies: list[dict]) -> list[str]:
    return []
def extract_top_skills(vacancies: list[dict], top_n: int) -> list[tuple[str, int]]:
    return []
def calculate_average_salary(vacancies: list[dict]) -> float:
    return 0.0
def group_by_company(vacancies: list[dict]) -> dict[str, int]:
    return {}
def format_vacancy_short(vacancy: dict) -> str:
    return 
def save_filtered_results(vacancies: list[dict], filename: str) -> bool:
    return 
def main():
    print("Hello World")

if __name__ =="__main__":
    #тупо вывод 
    main()