Compilare: user.cpp: In function ‘void buildtree(int, int, int)’: user.cpp:23: warning: suggest parentheses around ‘+’ inside ‘>>’ user.cpp: In function ‘void update(int, int, int, int)’: user.cpp:35: warning: suggest parentheses around ‘+’ inside ‘>>’ user.cpp: In function ‘int query_max(int, int, int, int, int)’: user.cpp:47: warning: suggest parentheses around ‘+’ inside ‘>>’ user.cpp: In function ‘int query_nr(int, int, int, int)’: user.cpp:62: warning: suggest parentheses around ‘+’ inside ‘>>’ user.cpp: In function ‘int main()’: user.cpp:68: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:69: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:71: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:73: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result