Compilare: user.cpp: In function ‘int main()’: user.cpp:48:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qxy.in","r",stdin); ^ user.cpp:49:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qxy.out","w",stdout); ^ user.cpp:50:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:52:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:56:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ user.cpp:58:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &st_lim, &dr_lim, &x, &y); ^ user.cpp: In function ‘int bin_search_lower(int)’: user.cpp:27:9: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized] return rez; ^ user.cpp: In function ‘int bin_search_upper(int)’: user.cpp:42:9: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized] return rez; ^