Compilare: user.cpp: In function ‘int main()’: user.cpp:20:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()>mx) ^ user.cpp:25:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()==mx) ^ user.cpp:54:158: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a[i].find(a[j][l])<a[i].size() && a[i].find(a[j][l+1])<a[i].size() && a[i].find(a[j][l])<a[i].find(a[j][l+1]) && l+1<a[j].size()) ^ user.cpp:59:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l==a[j].size()-1) ^ user.cpp:65:158: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a[j].find(a[i][l])<a[j].size() && a[j].find(a[i][l+1])<a[j].size() && a[j].find(a[i][l])<a[j].find(a[i][l+1]) && l+1<a[i].size()) ^ user.cpp:70:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l==a[i].size()-1) ^