Compilare: user.cpp: In function ‘int main()’: user.cpp:182: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long int’ user.cpp:167: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:168: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:171: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:176: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result