Problem

• We have text file which look like this

451480096703181148813905

• Above number represents Calories of the food carried by 3 Elves. Blank line separate the food carried by each Elves

• We have to find total Calories of the food carried by Elf carrying the most Calories

Solution

First let's break down problem

• Reading text file
• Find out total calories carried by each Elves
• Find out maximum out of that calories

calories_carried_by_each_elves=0max_calories=0File.foreach('day_01.txt')do|calories|ifcalories.to_i.positive?calories_carried_by_each_elves+=calories.to_ielsemax_calories=calories_carried_by_each_elvesifcalories_carried_by_each_elves>max_caloriescalories_carried_by_each_elves=0endendputsmax_calories