Compilare: user.cpp: In function ‘int main()’: user.cpp:42:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it = 0; it<sol.size(); ++ it) cout<<sol[it] << '\n'; ^ user.cpp:30:12: warning: ‘mn’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(a[i] - mn >0) ^