kinder.cpp: In member function 'void trie::addDfs(iTrie*, int, int, int, int)': kinder.cpp:41: warning: unused variable 'il' kinder.cpp:41: warning: unused variable 'ir' kinder.cpp: In member function 'void trie::changeDfs(iTrie*, int, int)': kinder.cpp:62: warning: unused variable 'il' kinder.cpp:62: warning: unused variable 'ir' kinder.cpp: In member function 'void trie::mergeDfs(iTrie*, iTrie*, int, iTrie*, int, int, int)': kinder.cpp:83: warning: unused variable 'il' kinder.cpp:83: warning: unused variable 'ir' kinder.cpp: In function 'int main()': kinder.cpp:246: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result kinder.cpp:247: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result kinder.cpp:249: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:250: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:251: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:258: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:262: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:263: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:264: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:265: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:272: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:273: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:280: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:281: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:282: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:283: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result