计算全行拨备覆盖率拨备除以不良贷款余额

def solve():
    from pyodide.http import open_url
    clients_csv = open_url(____).read()
    loans_csv = open_url(____).read()
    loan_classifications_csv = open_url(____).read()
    loan_provisions_csv = open_url(____).read()
    import sqlite3, pandas as pd
    from io import StringIO
    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    npl = pd.read_sql_query(____).iloc[____]['____'] or ____
    total_prov = pd.read_sql_query(____).iloc[____]['____'] or ____
    coverage = round(____) if npl > ____ else ____
    meets_req = coverage >= ____
    print(____)
    print(____)
    print(____)
    print(____)
    conn.close()