Compilare: main.cpp: In function 'int main()': main.cpp:19:14: warning: unused variable 'exista' [-Wunused-variable] 19 | bool exista = false; | ^~~~~~ main.cpp:15:15: warning: unused variable 'j' [-Wunused-variable] 15 | int t, i, j, n, a; | ^ main.cpp:15:21: warning: unused variable 'a' [-Wunused-variable] 15 | int t, i, j, n, a; | ^ main.cpp:46:26: warning: 'nr' may be used uninitialized in this function [-Wmaybe-uninitialized] 46 | out << nr << '\n'; | ^~~~