Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:13:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i < e.size(); i++) ~~^~~~~~~~~~ main.cpp:40:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(p = 1; (1 << p) < e.size(); p++) ~~~~~~~~~^~~~~~~~~~ main.cpp:42:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i + (1<<p) - 1 < e.size(); i++) ~~~~~~~~~~~~~~~^~~~~~~~~~