Compilare: user.cpp: In function ‘int main()’: user.cpp:23:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()>maxx) ^ user.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()==maxx) ^ user.cpp:59:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<v[i].size();k++) ^ user.cpp:61:70: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[i][k]!=v[j][poz] && poz<=v[j].size()-1) ^ user.cpp:65:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz==v[j].size()) ^ user.cpp:86:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<f.size();i++) ^ user.cpp:42:24: warning: unused variable ‘l’ [-Wunused-variable] int ok,okk,poz,l=0; ^