Compilare: main.cpp: In function 'void dfs(int)': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dijkstra(int)': main.cpp:55:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[a.nod].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:112:13: warning: unused variable 'sol' [-Wunused-variable] int sol=INF; ^~~