foo.cc: In function 'int main()':
foo.cc:13:1: error: '_uint128_t' was not declared in this scope; did you mean '__uint128_t'?
   13 | _uint128_t ans=0;
      | ^~~~~~~~~~
      | __uint128_t
foo.cc:39:18: error: 'ans' was not declared in this scope; did you mean 'abs'?
   39 |         if(x==m) ans=ans+maxn;
      |                  ^~~
      |                  abs
foo.cc:42:19: error: 'ans' was not declared in this scope; did you mean 'abs'?
   42 |   printf("%I128u",ans);
      |                   ^~~
      |                   abs

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