Crispo - Excel Challenge 47 2025

excel-challenges
weekly-exercises
Easy Sunday Excel Challenge
Published

November 23, 2025

Illustration for Crispo - Excel Challenge 47 2025

Challenge Description

Easy Sunday Excel Challenge

⭐ Problem Solution Criteria Value → To Support the Challenges

Solutions

library(tidyverse)
library(readxl)

path <- "2025-11-23/Challenge 80.xlsx"
input <- read_excel(path, range = "B3:C13")
test  <- read_excel(path, range = "E3:F13")

result = input %>%
  mutate(val2 = ifelse(Criteria == T, Value, NA)) %>%
  fill(val2, .direction = "up") %>%
  replace_na(list(val2 = 0)) %>%
  mutate(val3 = case_when(
    Criteria == T ~ 0,
    Criteria == F ~ Value + coalesce(NA, val2))) %>%
  select(Criteria, Value = val3)

all.equal(result, test)
# [1] TRUE

  • Logic:

    • Reads the workbook range needed for the challenge

    • Builds the intermediate helper columns that drive the final answer

  • 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

input = pd.read_excel("2025-11-23/Challenge 80.xlsx", usecols="B:C", skiprows=2, nrows=11)
test = pd.read_excel("2025-11-23/Challenge 80.xlsx", usecols="E:F", skiprows=2, nrows=11).rename(columns=lambda c: c.replace('.1', ''))

input["val2"] = input["Value"].where(input["Criteria"], pd.NA).bfill().astype(float).fillna(0)
input["val3"] = input.apply(lambda r: 0 if r["Criteria"] else r["Value"] + r["val2"], axis=1)
result = input[["Criteria", "val3"]].rename(columns={"val3": "Value"})
result["Value"] = result["Value"].astype(int)

print(result.equals(test)) # True

  • Logic:

    • Reads the workbook range needed for the challenge

  • 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.