Compilare: main.cpp: In function 'int main()': main.cpp:20:15: warning: variable 'option' set but not used [-Wunused-but-set-variable] long long option = 0; ^~~~~~ main.cpp:21:15: warning: variable 'pos1' set but not used [-Wunused-but-set-variable] long long pos1=-1, pos2=-1; ^~~~ main.cpp:21:24: warning: variable 'pos2' set but not used [-Wunused-but-set-variable] long long pos1=-1, pos2=-1; ^~~~