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+require 'date'
+
+# AUTHOR: Robert DiCicco
+
+# DATE: 2022-10-17
+
+# Challenge 187 Days Together ( Ruby )
+
+
+
+=begin
+
+Example 1
+
+
+
+Input: Foo => SD: '12-01' ED: '20-01'
+
+       Bar => SD: '15-01' ED: '18-01'
+
+
+
+Example 2
+
+
+
+Input: Foo => SD: '02-03' ED: '12-03'
+
+       Bar => SD: '13-03' ED: '14-03'
+
+
+
+Example 3
+
+
+
+Input: Foo => SD: '02-03' ED: '12-03'
+
+       Bar => SD: '11-03' ED: '15-03'
+
+
+
+Example 4
+
+
+
+Input: Foo => SD: '30-03' ED: '05-04'
+
+       Bar => SD: '28-03' ED: '02-04'
+
+=end
+
+
+
+dates = %w(2022-01-12 2022-01-20 2022-01-15 2022-01-18 2022-03-02 2022-03-12 2022-03-13 2022-03-14\
+
+           2022-03-02 2022-03-12 2022-03-11 2022-03-15 2022-03-30 2022-04-05 2022-03-28 2022-04-02)
+
+
+
+(0..dates.length - 1).step(4).each do |x|
+
+  sample = Date.parse(dates[x])
+
+  sample1 = Date.parse(dates[x+1])
+
+  sample2 = Date.parse(dates[x+2])
+
+  sample3 = Date.parse(dates[x+3])
+
+  n = 0
+
+  ((sample..sample1).to_a & (sample2..sample3).to_a).each {n+=1}
+
+  puts("Output: #{n} days")
+
+end