一元多项式求导

def solve(poly):
    result = []
    for t in str(poly).split(";"):
        parts = t.split(",")
        coef, exp = int(parts[0]), int(parts[1])
        new_coef = coef * exp
        new_exp = exp - 1 if exp > 0 else 0
        result.append(str(new_coef) + " " + str(new_exp))
    print(" ".join(result))