0_0_2133105_32274.cpp: In function `int cmp(node, node)':
0_0_2133105_32274.cpp:23: error: `dis' undeclared (first use this function)
0_0_2133105_32274.cpp:23: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2133105_32274.cpp: In function `double dis(node, node)':
0_0_2133105_32274.cpp:34: error: `double dis(node, node)' used prior to declaration
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