Compilare: main.cpp: In function 'void solve2(int)': main.cpp:89:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<lista[node].size(); i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int mn()': main.cpp:52:12: warning: 'indx' may be used uninitialized in this function [-Wmaybe-uninitialized] return indx; ^~~~ main.cpp: In function 'void prim(int)': main.cpp:67:15: warning: 'indx' may be used uninitialized in this function [-Wmaybe-uninitialized] mst[u]=true; ~~~~~~^~~~~