Compilare: user.cpp: In function ‘std::vector<int> s(int, int)’: user.cpp:35:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<b.size(); i++) b[i] |= (1<<(n-1)); ^ user.cpp: In function ‘int main()’: user.cpp:50:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sol.size(); i++) { ^