Compilare: user.cpp: In function ‘void RT_update(const int&, const int&, const int&)’: user.cpp:31:29: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] const int middle = left + right >> 1; ^ user.cpp: In function ‘void RT_DFS(const int&, const int&, const int&)’: user.cpp:45:34: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] const int &middle = left + right >> 1; ^ user.cpp: In function ‘int main()’: user.cpp:56:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("curcubeu.in", "r", stdin); ^ user.cpp:57:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("curcubeu.out", "w", stdout); ^ user.cpp:60:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d%d", &N, &A, &B, &C); ^