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Pacific Atlantic Water Flow

heights=[[1,2,2,3,5],[3,2,3,4,4],[2,4,5,3,1],[6,7,1,4,5],[5,1,1,2,4]]
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Pacific
Atlantic
Both
Pacific OceanPacific OceanAtlantic OceanAtlantic Ocean01234012341223532344245316714551124
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Step:Start: Find cells that can reach both Pacific and Atlantic oceans