'''
Problem:
algorithm:

tags:
'''

class Solution:
    @classmethod
    # Time: O(n)
    # Space: O(n)
    def solve(self, problems):
        # Solution here


        return

# Think:

# ReThink:

# Summary:


    @classmethod
    # Time: O(n)
    # Space: O(n)
    def better_solve(self, problems):
        # Solution here
        pass

if __name__ == '__main__':
    problems =  # input
    result = Solution.solve(problems)

    print result
    assert result == , "Solution Error."  # output check

    print "problems solved."
