center.cpp: In function 'int main()': center.cpp:231: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result center.cpp:233: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result center.cpp:275: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result center.cpp: In function 'void center_traversal()': center.cpp:139: warning: 'fsol' may be used uninitialized in this function center.cpp:139: warning: 'dwmin_type' may be used uninitialized in this function center.cpp:139: warning: 'gsol' may be used uninitialized in this function