/in/foo.cc:28:27: error: macro "max" requires 3 arguments, but only 2 given
    ans = max(ans, dp[i][j]);
                           ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:28:10: error: cannot resolve overloaded function 'max' based on conversion to type 'int'
    ans = max(ans, dp[i][j]);
          ^~~