本压缩包包含2024年华数杯竞赛C题的完整解决方案，内含详细代码和最终结果文件，适用于参赛者参考学习。
```python
import pandas as pd
import os
data_folder = C:/Users/kille/Desktop/C/附件/
all_data = pd.DataFrame()
for file_name in os.listdir(data_folder):
if file_name.endswith(.csv):
city_data = pd.read_csv(os.path.join(data_folder, file_name))
city_name = os.path.splitext(file_name)[0]
city_data[城市] = city_name
all_data = pd.concat([all_data, city_data], ignore_index=True)
all_data.to_csv(merged_data.csv, index=False)
print(all_data.info())
```
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