cumpanit.cpp: In function 'int main()': cumpanit.cpp:62: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cumpanit.cpp:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cumpanit.cpp:64: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cumpanit.cpp: In function 'long long int caut(long long int, long long int)': cumpanit.cpp:23: warning: control reaches end of non-void function