Compilare: main.cpp: In function 'int main()': main.cpp:20:9: warning: unused variable 'ok' [-Wunused-variable] 20 | int ok=0,nr=0,cnt=0; | ^~ main.cpp:20:14: warning: unused variable 'nr' [-Wunused-variable] 20 | int ok=0,nr=0,cnt=0; | ^~ main.cpp:20:19: warning: unused variable 'cnt' [-Wunused-variable] 20 | int ok=0,nr=0,cnt=0; | ^~~