palindromuri.cpp: In function 'int main()': palindromuri.cpp:107: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result palindromuri.cpp:108: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result palindromuri.cpp:110: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result palindromuri.cpp: In function 'long long int maxnr(long long int)': palindromuri.cpp:73: warning: control reaches end of non-void function