Equality Game

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Niel plays an equality game. It is stated that in the game each condition will be a 4 letter string. There are two types of strings that can be given as condition. Either $"a==b"$ or $"a!=b"$ where a and b are some variables whose value is not known. Niel wants to know if all the conditions can be satisfied for some values of variable. If all the conditions is satisfied print "Yes" else print "No"

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solution.cppC++17

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