answer.code: In instantiation of ‘constexpr int Geometry::sign(const T&) [with T = __int128]’:
answer.code:469:16:   required from ‘constexpr bool Geometry::isZero(const T&) [with T = __int128]’
answer.code:570:72:   required from here
answer.code:459:12: error: call of overloaded ‘abs(const __int128&)’ is ambiguous
  459 |     if (abs(a) < eps) return 0;
      |         ~~~^~~
In file included from /usr/include/c++/13/cstdlib:79,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:42,
                 from answer.code:1:
/usr/include/stdlib.h:840:12: note: candidate: ‘int abs(int)’
  840 | extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
      |            ^~~
In file included from /usr/include/c++/13/cstdlib:81:
/usr/include/c++/13/bits/std_abs.h:130:3: note: candidate: ‘constexpr __gnu_cxx::__bfloat16_t std::abs(__gnu_cxx::__bfloat16_t)’
  130 |   abs(__gnu_cxx::__bfloat16_t __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:124:3: note: candidate: ‘constexpr _Float128 std::abs(_Float128)’
  124 |   abs(_Float128 __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:114:3: note: candidate: ‘constexpr _Float64 std::abs(_Float64)’
  114 |   abs(_Float64 __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:108:3: note: candidate: ‘constexpr _Float32 std::abs(_Float32)’
  108 |   abs(_Float32 __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:102:3: note: candidate: ‘constexpr _Float16 std::abs(_Float16)’
  102 |   abs(_Float16 __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:79:3: note: candidate: ‘constexpr long double std::abs(long double)’
   79 |   abs(long double __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:75:3: note: candidate: ‘constexpr float std::abs(float)’
   75 |   abs(float __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:71:3: note: candidate: ‘constexpr double std::abs(double)’
   71 |   abs(double __x)
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:61:3: note: candidate: ‘long long int std::abs(long long int)’
   61 |   abs(long long __x) { return __builtin_llabs (__x); }
      |   ^~~
/usr/include/c++/13/bits/std_abs.h:56:3: note: candidate: ‘long int std::abs(long int)’
   56 |   abs(long __i) { return __builtin_labs(__i); }
      |   ^~~