Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i = 0; i < v[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:82:17: warning: unused variable 'mn' [-Wunused-variable] 82 | int mn = oo, imn; | ^~ main.cpp:82:26: warning: unused variable 'imn' [-Wunused-variable] 82 | int mn = oo, imn; | ^~~ main.cpp:71:41: warning: 'imn' may be used uninitialized in this function [-Wmaybe-uninitialized] 71 | fout << imn*(mn!=oo) << " "; | ^~~