Compilare: user.cpp: In function ‘int main()’: user.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(m!=0 && i<=s.size()) ^ user.cpp:36:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()) ^ user.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v.size();j++) ^ user.cpp:11:15: warning: variable ‘sem’ set but not used [-Wunused-but-set-variable] int n,m,i,sem; ^