Compilare: user.cpp: In function ‘void dfsfii(int)’: user.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[x].size(); i++) ~~^~~~~~~~~~~~~ user.cpp: In function ‘void dfstata(int)’: user.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[x].size(); i++) ~~^~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:74:16: warning: ‘mi’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << mi << ' ' << mn; ^~~