Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:17: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘int query(int)’: user.cpp:24: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘void update2(int, int)’: user.cpp:32: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘int query2(int)’: user.cpp:40: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘int main()’: user.cpp:49: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:50: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result