Compilare: main.cpp: In function 'int main()': main.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<query>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int i = 0; i < que.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:39:23: warning: unused variable 'last' [-Wunused-variable] 39 | int maxi = -1, x, y, last = -1, maxfr = 0, st, dr, nr = 0, ind; | ^~~~ main.cpp:39:45: warning: variable 'st' set but not used [-Wunused-but-set-variable] 39 | int maxi = -1, x, y, last = -1, maxfr = 0, st, dr, nr = 0, ind; | ^~