Compilare: user.cpp: In function ‘void solve()’: user.cpp:132:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(var i=0; i<Norm.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:174:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(var i=0; i<Norm.size(); i++) { ^ user.cpp:175:19: warning: unused variable ‘j’ [-Wunused-variable] for(auto &j : Buck[i]) { ^ user.cpp:183:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(var i=0; i<Norm.size(); i++) { ^