Compilare: main.cpp: In function 'long long int dijk(int)': main.cpp:36:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for (int i = 0; i< adiac[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:99:24: warning: unused variable 'xmin' [-Wunused-variable] 99 | int i, j, x, y, c, xmin=0; | ^~~~