Compilare: user.cpp: In function ‘void Salv()’: user.cpp:55:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<nod.size(); i++) ^ user.cpp:59:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[a[x][j].nr] && j+1<a[x].size()) j++; ^ user.cpp: In function ‘int main()’: user.cpp:78:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sol.size(); i++) ^ user.cpp: In function ‘void Salv()’: user.cpp:67:20: warning: ‘oldnod’ may be used uninitialized in this function [-Wmaybe-uninitialized] w.nr=oldnod; ^