Greed is good, greed is right, greed works!


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    I

    Enjoy! Greed is Good speech

    def findLongestChain(self, pairs):
        # sort by the second number
        sorted_pairs = sorted(pairs, key=lambda k: k[1])
        # ends_with represents the last seen 'second number'
        i, count, ends_with = 0, 0, float('-infinity')
        while i < len(sorted_pairs):
            pair = sorted_pairs[i]
            start, end = pair
            # search for an interval that starts after the last seen 'second number'
            if ends_with < start:
                ends_with = end
                count += 1
            i += 1
        return count
    

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