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View Compilation Error

0_0_4238865_17945.cpp: In member function `long long int tree::query(int, int)':
0_0_4238865_17945.cpp:55: error: `total' undeclared (first use this function)
0_0_4238865_17945.cpp:55: error: (Each undeclared identifier is reported only once for each function it appears in.)


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