Compilare: user.cpp: In function ‘void rangeTreeUpdate(int, int, int)’: user.cpp:16:23: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int middle = left + right >> 1; ^ user.cpp: In function ‘int rangeTreeQuery(int, int, int)’: user.cpp:34:23: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int middle = left + right >> 1; ^ user.cpp: In function ‘int main()’: user.cpp:45:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("arbint.in", "r", stdin); ^ user.cpp:46:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("arbint.out", "w", stdout); ^ user.cpp:49:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &N, &M); ^ user.cpp:51:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &updateValue); ^ user.cpp:57:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &operation); ^ user.cpp:58:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &a, &b); ^