Compilare: main.cpp: In function 'int main()': main.cpp:37:37: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << first << " " << last << " " << v[p_max_min]; ^~~ main.cpp:37:22: warning: 'first' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << first << " " << last << " " << v[p_max_min]; ^~~