Compilare: main.cpp: In function 'void dik()': main.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<dijkstra, std::allocator<dijkstra> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (i = 0; i < ad[a.nod].size(); i++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:30: warning: unused variable 'j' [-Wunused-variable] 45 | int t, n, m, a, b, c, i, j, s, ok = 0; | ^