Compilare: user.cpp: In function ‘void rangeTreeBuild(int, int, int)’: user.cpp:17:23: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int middle = left + right >> 1; ^ user.cpp: In function ‘void rangeTreeUpdate(int, int, int)’: user.cpp:35:23: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int middle = left + right >> 1; ^ user.cpp: In function ‘int rangeTreeQuery(int, int, int)’: user.cpp:53:23: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int middle = left + right >> 1; ^ user.cpp: In function ‘int main()’: user.cpp:64:38: 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:65:40: 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:68:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &N, &M); ^ user.cpp:70:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", V + i); ^ user.cpp:76:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d", &operation, &a, &b); ^