Compilare: user.cpp: In function ‘int main()’: user.cpp:77: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:77: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:90: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:90: warning: use of ‘ll’ length modifier with ‘f’ type character user.cpp:72: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:73: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:75: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:77: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result