Compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[start].size();j++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int ver(int, int)': main.cpp:46:8: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(tata[bk_a]) ^~ main.cpp:48:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' return 1; ^~~~~~