Compilare: main.cpp: In function 'void dik()': main.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<dijkstra>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (i = 0; i < ad[a.nod].size(); i++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:50:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<dijkstra>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (i = 0; i < ad[node].size(); i++) | ~~^~~~~~~~~~~~~~~~~