优序融资理论

def solve(____):
    funding_gap = investment_need - internal_funds
    financing_plan = []
    remaining = funding_gap
    for source, cost in financing_hierarchy:
        if remaining <= ____:
            break
        amount = min(remaining, internal_funds if source == "____" else float(____))
        financing_plan.append(____)
        remaining -= amount
    return {"____": funding_gap, "____": financing_plan}