0_0_8810508_11422.cpp: In function `int main()':
0_0_8810508_11422.cpp:63: error: `n' undeclared (first use this function)
0_0_8810508_11422.cpp:63: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8810508_11422.cpp:42: error: too few arguments to function `void buildtree(int, int, int)'
0_0_8810508_11422.cpp:74: error: at this point in file
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