Compilare: main.cpp: In function 'void dfs(int)': main.cpp:42:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dijkstra(int)': main.cpp:76:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0,vecin,cost;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp:75:17: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] viz[nod]=1; ~~~~~~~~^~ main.cpp: In function 'void dijkstra2_electric_boogaloo()': main.cpp:104:17: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] viz[nod]=1; ~~~~~~~~^~