Compilare: main.cpp: In function 'int main()': main.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<short int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for (j = 0; j < v[i].size(); j++) | ~~^~~~~~~~~~~~~ main.cpp:14:27: warning: unused variable 'l' [-Wunused-variable] 14 | int n, q, k, a, i, j, l; | ^