Compilare: user.cpp: In function ‘void up(int, long long int)’: user.cpp:21: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘long long int q(int)’: user.cpp:22: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘void solve()’: user.cpp:26: warning: unused variable ‘j’ user.cpp:26: warning: unused variable ‘k’ user.cpp:26: warning: unused variable ‘aux’ user.cpp: In function ‘void read_data()’: user.cpp:60: warning: unused variable ‘j’ user.cpp:60: warning: unused variable ‘k’ user.cpp:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:81: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:82: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result