Compilare: main.cpp: In function 'void solve_lin(int)': main.cpp:128:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<query_lin>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | for (int i = 0; i < ql[lin].size(); i++) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void solve_all()': main.cpp:157:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<query_lin>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 157 | for (int j = 0; j < ql[i].size(); j++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void transmat()': main.cpp:170:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 170 | for (int i = 1; i < vv.size(); i++) | ~~^~~~~~~~~~~