View Compilation Error

0_0_39581532_4678.cpp: In function 'void solve()':
0_0_39581532_4678.cpp:20:20: error: unable to find numeric literal operator 'operator""ll8c'
   20 |             c[i] = 1ll8c[i]^(d&(1ll<<k));//取出第k位的值看看有没有进位
      |                    ^~~~~
0_0_39581532_4678.cpp:20:20: note: use '-fext-numeric-literals' to enable more built-in suffixes