从耗时认粗细

三个版本各打印「卖出 K 耗时 T」，库存 2。用规则「结果对且最快 = 刚好；结果对但慢 = 太粗；结果错 = 太细」分类：

runs = {"甲": (2, 1.21), "乙": (4, 0.30), "丙": (2, 0.31)}
label = {}
for name, (sold, t) in runs.items():
    if sold != 2:
        label[name] = "太细"
    else:
        label[name] = "太粗" if t > 1.0 else "刚好"
print(",".join(k + ":" + v for k, v in sorted(label.items())))