Compilare: user.cpp: In function ‘void Solve(int, int)’: user.cpp:18:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<num[l].size();i++) ^ user.cpp: In function ‘int Value(int)’: user.cpp:25:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<num[l].size();i++) ^ user.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^