Compilare: main.cpp: In function 'int main()': main.cpp:30:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[nod].size(); j++) { ~^~~~~~~~~~~~~~ main.cpp:12:32: warning: unused variable 'newn' [-Wunused-variable] int i, n, x, y, c, j, nod, newn, m, cost; ^~~~ main.cpp:12:41: warning: unused variable 'cost' [-Wunused-variable] int i, n, x, y, c, j, nod, newn, m, cost; ^~~~