Am not getting what is step in this and how output comes and what is input

The first line of the input contains an integer denoting the Minimum Fahrenheit value. The second line of the input contains an integer denoting the Maximum Fahrenheit value. The third line of the input contains an integer denoting the Step.

Constraints

@itsmazhar7, start = 0 end = 100, step = 20
then start with 0 add 20 each time till 100
i.e 0,20,40,60,80,100

for implementation difficulties refer : https://ide.codingblocks.com/s/657591

@itsmazhar7 if doubt is clear mark as resolved

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