Compilare: user.cpp: In function ‘void solve()’: user.cpp:57:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < fi[crt].size(); j++) ^ user.cpp: In function ‘void nr_urmasi(int)’: user.cpp:77:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < fi[x].size(); i++) ^