Compilare: main.cpp: In function 'std::pair<std::vector<long long unsigned int>, std::vector<int> > dijk(int)': main.cpp:38:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int i = 0; i< adiac[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:103:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 103 | for (i = 0; i < rez.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:108:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 108 | for (i = 0; i < rez.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:113:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for (i = 0; i < rez.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:68:12: warning: unused variable 'j' [-Wunused-variable] 68 | int i, j, x, y, c, xmin=0; | ^