# dacode / dacode-dm-csv-042

- taskset: [dacode](https://harnessreport.com/tasks/dacode.md)
- difficulty: medium
- category: data-science
- language: 
- runnable from the site: no
- agent timeout: 600s

## Results by harness

_none yet_

## Instruction

```
All input files are under `/app`. Save your output file(s) under `/app/output`.

Calculate the total number of days between the InvoiceDate and the CohortDate (the date of a customer’s first purchase) for each entry in the dataset. Save the calculated difference as CohortIndex in the result.csv file, ensuring the output matches the provided format
```
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Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp