Compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<L[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if (nr == 2) ^~ main.cpp:59:55: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' p[comp] = make_pair(w[poz[2]][0], 0); f[poz[2]] = 1; ^