Compilare: user.cpp: In function ‘int main()’: user.cpp:127:13: warning: unused variable ‘wHere’ [-Wunused-variable] int wHere = j - 1 - stk[(int)stk.size() - 2].second; ^ user.cpp:140:11: warning: unused variable ‘wHere’ [-Wunused-variable] int wHere = 2 * m - 2 - stk[(int)stk.size() - 2].second; ^ user.cpp: In member function ‘void InputReader::getBuffer()’: user.cpp:20:55: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] cursor = 0; fread(buffer, 1, kBufferSize, stdin); ^