Crispo - Excel Challenge 25 2025

excel-challenges
weekly-exercises
Easy Sunday Excel Challenge
Published

June 22, 2025

Illustration for Crispo - Excel Challenge 25 2025

Challenge Description

Easy Sunday Excel Challenge

⭐ Problem Solution Students Subject Student Easy Sunday Excel Challenge

Solutions

library(tidyverse)
library(readxl)

path = "files/2025-06-22/Challenge 36.xlsx"
input = read_excel(path, range = "B3:C7")
test  = read_excel(path, range = "E3:F11")

result = input %>%
  separate_longer_delim(Students, delim = ", ") 

all.equal(test, result, check.attributes = FALSE)
#> [1] TRUE

  • Logic:

    • Reads the workbook range needed for the challenge

    • Reshapes the data to the grain required by the task

  • Strengths:

    • The R solution stays compact and mirrors the workbook logic closely.

  • Areas for Improvement:

    • The code assumes the workbook layout and named ranges remain stable.

  • Gem:

    • The best part of the solution is choosing a tidy intermediate shape before producing the final answer.
import pandas as pd

path = "files/2025-06-22/Challenge 36.xlsx"
input = pd.read_excel(path, usecols="B:C", skiprows=2, nrows=4)
test = (
    pd.read_excel(path, usecols="E:F", skiprows=2, nrows=8)
      .rename(columns=lambda col: col.replace('.1', ''))
)

result = (
    input
    .assign(Student=input['Students'].str.split(', '))
    .explode('Student')
    .reset_index(drop=True)
    [['Student', 'Subject']]
)

print(result.equals(test))

  • Logic:

    • Reads the workbook range needed for the challenge

    • Builds the intermediate helper columns that drive the final answer

  • Strengths:

    • The Python version keeps the same rule in a direct pandas-oriented workflow.

  • Areas for Improvement:

    • As with the R version, any workbook layout change would require small adjustments.

  • Gem:

    • The implementation stays close to the stated challenge instead of adding unnecessary complexity.

Difficulty Level

This task is easy to moderate:

  • The business rule is readable, but the workbook still needs a few careful transformation steps.