Compilare: main.cpp: In function 'void dijkstra(int, int)': main.cpp:36:31: 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 < G[u].size(); ++ i) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:102:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for (int i = 0; i < v.size(); ++ i) | ~~^~~~~~~~~~ main.cpp:94:29: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized] 94 | while (tata[index][y] != -1) { | ~~~~~~~~~~~~~^