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0_0_39752180_26875.cpp:7:8: error: redefinition of 'double fabs(double)'
    7 | double fabs(double x){
      |        ^~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/cmath:47,
                 from 0_0_39752180_26875.cpp:4:
gcc-13.1.0/x86_64-w64-mingw32/include/math.h:225:31: note: 'double fabs(double)' previously defined here
  225 |   __CRT_INLINE double __cdecl fabs (double x)
      |                               ^~~~