Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[nod].size();j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<vt[nod].size();j++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(!viz[i]) ^~ main.cpp:52:11: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' while(!s.empty()) ^~~~~ main.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~