Compilare: main.cpp: In function 'int dfs(int, int, int)': main.cpp:27:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) { ~~^~~~~~~~~~~~~~~ main.cpp:29:17: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (nod == x1 && it == x2 || nod == x2 && it == x1 || tata[it] != tata[nod]) { ~~~~~~~~~~^~~~~~~~~~~