Compilare: main.cpp: In function 'int main()': main.cpp:11:27: warning: unused variable 'v' [-Wunused-variable] 11 | int x, y, z, w, n, m, v, vw; | ^ main.cpp:11:30: warning: unused variable 'vw' [-Wunused-variable] 11 | int x, y, z, w, n, m, v, vw; | ^~ main.cpp:12:43: warning: 'n' is used uninitialized [-Wuninitialized] 12 | vector< vector< pair<int, int> > > g(n+1); | ~^~ main.cpp:11:21: note: 'n' declared here 11 | int x, y, z, w, n, m, v, vw; | ^