Compilare: user.cpp: In function ‘bool solve(int)’: user.cpp:24: warning: array subscript has type ‘char’ user.cpp:24: warning: array subscript has type ‘char’ user.cpp:24: warning: array subscript has type ‘char’ user.cpp:24: warning: array subscript has type ‘char’ user.cpp:25: warning: array subscript has type ‘char’ user.cpp:25: warning: array subscript has type ‘char’ user.cpp:25: warning: array subscript has type ‘char’ user.cpp:25: warning: array subscript has type ‘char’ user.cpp:27: warning: array subscript has type ‘char’ user.cpp: In function ‘int main()’: user.cpp:92: warning: array subscript has type ‘char’ user.cpp:92: warning: array subscript has type ‘char’ user.cpp:82: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:83: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result