Compilare: user.cpp: In function ‘int main()’: user.cpp:89:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<g[t[u]].size(); j++) ^ user.cpp:55:24: warning: unused variable ‘prim’ [-Wunused-variable] int i, n, k, x, y, prim, ultim; ^ user.cpp:55:30: warning: unused variable ‘ultim’ [-Wunused-variable] int i, n, k, x, y, prim, ultim; ^