Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:25: error: cannot convert ‘const char*’ to ‘FILE*’ for argument ‘1’ to ‘int fscanf(FILE*, const char*, ...)’ user.cpp:28: error: ‘f’ was not declared in this scope user.cpp:20: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:21: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:64: warning: statement has no effect user.cpp:70: error: expected primary-expression before ‘=’ token