Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[node].size(); ++i) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void constructTree()': main.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < euler.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:46:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; (1 << j) < euler.size(); ++j) ~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:47:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i + (1 << (j - 1)) - 1 < euler.size(); ++i) { ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~