Compilare: user.cpp: In function ‘void solve()’: user.cpp:56:15: warning: unused variable ‘sol’ [-Wunused-variable] long long sol = 0; ^ user.cpp: In function ‘void write()’: user.cpp:71:11: warning: unused variable ‘fout’ [-Wunused-variable] FILE *fout = freopen("strabunica.out", "w", stdout); ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:16:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ user.cpp: In member function ‘void InputReader::advance()’: user.cpp:43:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^