最小方差组合

def solve(____):
    import math
    s1, s2 = std_devs
    w1 = (____) / (____)
    w2 = ____ - w1
    min_variance = w1 ** ____ * s1 ** ____ + w2 ** ____ * s2 ** ____ + ____ * w1 * w2 * s1 * s2 * correlation
    min_std = math.sqrt(____)
    return {"____": round(____), "____": round(____), "____": round(____)}