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Backtracking solution in ruby Code Example
Backtracking solution in ruby 
def exact_sum?(sum, arr)
return true if sum==0
return false if sum < 0 || arr.empty?
# now we are checking both cases
exact_sum?(sum - arr[0], arr[1,arr.length]) || exact_sum?(sum, arr[1,arr.length])
end

puts exact_sum?(12, [1, 2, 3, 4, 5]);
# => true
Source: hackernoon.com



Ruby

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 Code Example
Category:
 Coding
Sub Category:
 Code Example
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Horje