Compilare: user.cpp: In function ‘void Update(int&, int, int, int)’: user.cpp:35:24: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = left + right >> 1; ^ user.cpp: In function ‘bool Compare(int, int, int, int)’: user.cpp:63:20: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = left + right >> 1; ^ user.cpp: In function ‘void ReadInput()’: user.cpp:78:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %s", hnum); ^ user.cpp: In function ‘int main()’: user.cpp:95:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("supersf.in", "r", stdin); ^ user.cpp:96:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("supersf.out", "w", stdout); ^