Compilare: main.cpp: In function 'void dfs(int)': main.cpp:38:23: 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 'for' clause does not guard... [-Wmisleading-indentation] for(int i = 1 ; i <= n ; i++) ^~~ main.cpp:58:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' ofstream out("dfs.out"); ^~~~~~~~