Compilare: main.cpp: In function 'bool is_muchie(int, int)': main.cpp:10:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[a].size(); i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'void DFS(int)': main.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) { ~~^~~~~~~~~~~~~~~~ main.cpp:22:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < G[node].size(); j++) { ~~^~~~~~~~~~~~~~~~