Compilare: user.cpp: In function ‘long long int check(long long int, long long int)’: user.cpp:19:9: warning: unused variable ‘cad’ [-Wunused-variable] int cad; ^ user.cpp:20:8: warning: unused variable ‘aux’ [-Wunused-variable] ll aux; ^ user.cpp: In function ‘int main()’: user.cpp:77:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xor3.in","r",stdin); ^ user.cpp:78:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xor3.out","w",stdout); ^ user.cpp:97:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld%lld%lld%lld", &Q, &i, &j, &a, &b, &m); ^