0_0_2786950_31891.cpp: In function `lld xcross(Point&, Point&, Point&)':
0_0_2786950_31891.cpp:30: error: no matching function for call to `xcross(Point, Point)'
0_0_2786950_31891.cpp:25: note: candidates are: lld xcross(Point&, Point&)
0_0_2786950_31891.cpp:29: note: lld xcross(Point&, Point&, Point&)
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