Compilare: main.cpp: In function 'void display_graph()': main.cpp:61:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int j = 0; j < V[i].size(); ++j) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void display_costs()': main.cpp:75:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | for(int j = 0; j < V[i].size(); ++j) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void dijkstra()': main.cpp:145:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 145 | for(int i = 0; i < V[ curr ].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~