Compilare: main.cpp: In function 'void dfs(int)': main.cpp:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v1[x].size() ; i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(!viz[i]) ^~ main.cpp:55:10: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' ofstream out("sortaret.out"); ^~~~~~~~