Compilare: main.cpp: In member function 'Tinfo segment_tree::SegmentTree<Tinfo, Combiner>::query(int, int) [with Tinfo = int; Combiner = tree_decomposition::DefaultCombiner<int>]': main.cpp:112:11: warning: 'ret_lsh' may be used uninitialized in this function [-Wmaybe-uninitialized] Tinfo ret_lsh, ret_rsh; ^~~~~~~ main.cpp:112:20: warning: 'ret_rsh' may be used uninitialized in this function [-Wmaybe-uninitialized] Tinfo ret_lsh, ret_rsh; ^~~~~~~ main.cpp: In member function 'Tinfo tree_decomposition::TreeDecomposition<Tinfo, Combiner, RCombiner>::query(int, int) [with Tinfo = int; Combiner = tree_decomposition::DefaultCombiner<int>; RCombiner = tree_decomposition::DefaultCombiner<int>]': main.cpp:352:20: warning: 'ret_dst' may be used uninitialized in this function [-Wmaybe-uninitialized] Tinfo ret_src, ret_dst, ret; ^~~~~~~ main.cpp:352:11: warning: 'ret_src' may be used uninitialized in this function [-Wmaybe-uninitialized] Tinfo ret_src, ret_dst, ret; ^~~~~~~ main.cpp: In member function 'int tree_decomposition::TreeDecomposition<Tinfo, Combiner, RCombiner>::dfs(int) [with Tinfo = int; Combiner = tree_decomposition::DefaultCombiner<int>; RCombiner = tree_decomposition::DefaultCombiner<int>]': main.cpp:287:14: warning: 'chosen_son' may be used uninitialized in this function [-Wmaybe-uninitialized] path_[what_path_[chosen_son]].array_.push_back(node); ~~~~~^