Compilare: main.cpp: In function 'void dijkstra()': main.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[node].size(); j++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[0].size(); i++){ ~~^~~~~~~~~~~~~