Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int solve()': main.cpp:114:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[nod].size(); j++) ~^~~~~~~~~~~~~~ main.cpp:123:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[nod].size(); j++) ~^~~~~~~~~~~~~~