Compilare: main.cpp: In function 'int main()': main.cpp:11:31: warning: unused variable 'k' [-Wunused-variable] long long int i,j,a,b,con,k,tot,ctot,cb; ^ main.cpp:11:37: warning: unused variable 'ctot' [-Wunused-variable] long long int i,j,a,b,con,k,tot,ctot,cb; ^~~~ main.cpp:9:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nasa.in","r",stdin); ^ main.cpp:10:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nasa.out","w",stdout); ^ main.cpp:14:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&a,&b); ^