Compilare: main.cpp: In function 'void F(int)': main.cpp:34:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | {for(int l=0;l<v[k].size();l++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:62: warning: unused variable 'st' [-Wunused-variable] 77 | {int a=(q[*I].a-1)*n+q[*I].b, b=(q[*I].c-1)*n+q[*I].d, st=q[*I].st, dr=q[*I].dr; | ^~ main.cpp:77:75: warning: unused variable 'dr' [-Wunused-variable] 77 | {int a=(q[*I].a-1)*n+q[*I].b, b=(q[*I].c-1)*n+q[*I].d, st=q[*I].st, dr=q[*I].dr; | ^~