Compilare: user.cpp: In function ‘void bf(int)’: user.cpp:24:40: 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:117:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (sol.size() != (M+1)) { ^ user.cpp:115:9: warning: ‘tmp’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (exista(tmp)) { ^