0_0_7355719_16874.cpp:9: error: `max_num' was not declared in this scope
0_0_7355719_16874.cpp: In function `void init()':
0_0_7355719_16874.cpp:15: error: `node' undeclared (first use this function)
0_0_7355719_16874.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7355719_16874.cpp: In function `int find_root(int)':
0_0_7355719_16874.cpp:23: error: `node' undeclared (first use this function)
0_0_7355719_16874.cpp: In function `void union_set(int, int)':
0_0_7355719_16874.cpp:34: error: `node' undeclared (first use this function)
0_0_7355719_16874.cpp: In function `int main()':
0_0_7355719_16874.cpp:52: error: `node' undeclared (first use this function)
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