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View Compilation Error

0_0_4635404_32264.cpp: In member function `double P::dist(const P&)':
0_0_4635404_32264.cpp:147: error: `SQR' undeclared (first use this function)
0_0_4635404_32264.cpp:147: error: (Each undeclared identifier is reported only once for each function it appears in.)


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