Compilare: user.cpp: In function ‘void Read()’: user.cpp:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void Solve()’: user.cpp:50: warning: array subscript has type ‘char’ user.cpp:50: warning: array subscript has type ‘char’ user.cpp:50: warning: array subscript has type ‘char’ user.cpp:58: warning: array subscript has type ‘char’ user.cpp:58: warning: array subscript has type ‘char’ user.cpp:58: warning: array subscript has type ‘char’ user.cpp:58: warning: array subscript has type ‘char’ user.cpp:58: warning: array subscript has type ‘char’ user.cpp:58: warning: array subscript has type ‘char’ user.cpp:60: warning: array subscript has type ‘char’ user.cpp:60: warning: array subscript has type ‘char’ user.cpp:60: warning: array subscript has type ‘char’ user.cpp:61: warning: array subscript has type ‘char’ user.cpp:61: warning: array subscript has type ‘char’ user.cpp:61: warning: array subscript has type ‘char’ user.cpp:70: warning: array subscript has type ‘char’ user.cpp:70: warning: array subscript has type ‘char’ user.cpp:70: warning: array subscript has type ‘char’ user.cpp:36: warning: unused variable ‘x’ user.cpp:36: warning: unused variable ‘y’ user.cpp:36: warning: unused variable ‘z’ user.cpp: In function ‘void Write()’: user.cpp:76: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result