Compilare: user.cpp: In function ‘bool solve(int, int)’: user.cpp:85:10: warning: unused variable ‘maxim’ [-Wunused-variable] bool maxim = 0; ^~~~~ user.cpp: In function ‘bool ok(int, int)’: user.cpp:79:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^