/in/foo.cc: In function 'int main()':
/in/foo.cc:19:54: warning: second operand of conditional expression has no effect [-Wunused-value]
    std::cout << dp[(n - 1) & 1][m] ? "true" : "false";
                                                      ^
/in/foo.cc:19:54: warning: third operand of conditional expression has no effect [-Wunused-value]