Compilare: user.cpp: In function ‘int main()’: user.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((p1<a[i].size()||p2<a[j].size())&&ok) ^ user.cpp:36:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((p1<a[i].size()||p2<a[j].size())&&ok) ^ user.cpp:40:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p1<a[i].size()&&v[a[i][p1]].x<=l+1) ^ user.cpp:42:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p2<a[j].size()&&v[a[j][p2]].x<=l+1) ^