Given a string path, where path =
'N', 'S', 'E' or 'W', each representing moving
one unit north, south, east, or west, respectively. You start at
the origin (0, 0) on a 2D plane and walk on the path
specified by path.
Return true if the path crosses itself at any
point, that is, if at any time you are on a location you have
previously visited. Return false otherwise.
Given a string path, where path[i] = 'N', 'S', 'E' or 'W', each representing moving one unit north, south, east, or west
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Given a string path, where path[i] = 'N', 'S', 'E' or 'W', each representing moving one unit north, south, east, or west
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