Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:25:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < ad[nod].size() ; i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void RMQ()': main.cpp:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<elem.size();i++) ~^~~~~~~~~~~~ main.cpp:46:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; ( 1 << i) <= elem.size(); ++i) ~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:48:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j + ( 1 << i ) - 1 <= elem.size(); ++j) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:73:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0 ; i <= elem.size() ; i++) ~~^~~~~~~~~~~~~~