Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); i ++) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:14: warning: iteration 23 invokes undefined behavior [-Waggressive-loop-optimizations] p[i] = p[i-1] * p[i-1]; ~~~~~^~~~~~~~~~~~~~~~~ main.cpp:45:23: note: within this loop for (int i = 2; i <= 25; i ++) { ~~^~~~~