Eroare de compilare: user.cpp:11:18: error: expected unqualified-id before ‘int’ struct TreeNode(int v) : val(v), parent(NULL) {} ^ user.cpp:11:18: error: expected ‘)’ before ‘int’ user.cpp: In function ‘void make_set(int)’: user.cpp:20:39: error: no matching function for call to ‘TreeNode::TreeNode(int&)’ trees.push_back(new struct TreeNode(a)); ^ user.cpp:20:39: note: candidates are: user.cpp:8:8: note: TreeNode::TreeNode() struct TreeNode{ ^ user.cpp:8:8: note: candidate expects 0 arguments, 1 provided user.cpp:8:8: note: constexpr TreeNode::TreeNode(const TreeNode&) user.cpp:8:8: note: no known conversion for argument 1 from ‘int’ to ‘const TreeNode&’ user.cpp:8:8: note: constexpr TreeNode::TreeNode(TreeNode&&) user.cpp:8:8: note: no known conversion for argument 1 from ‘int’ to ‘TreeNode&&’ user.cpp: In function ‘int main()’: user.cpp:51:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disjoint.in", "r", stdin); ^ user.cpp:52:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disjoint.out", "w", stdout); ^ user.cpp:53:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:59:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &op, &a, &b); ^