foo.cc:41:5: error: conflicting declaration ‘int n’
   41 | int n,f;
      |     ^
foo.cc:3:8: note: previous declaration as ‘double n’
    3 | double n,f,R[10005],l=1,r,ans;
      |        ^
foo.cc:41:7: error: conflicting declaration ‘int f’
   41 | int n,f;
      |       ^
foo.cc:3:10: note: previous declaration as ‘double f’
    3 | double n,f,R[10005],l=1,r,ans;
      |          ^
foo.cc:42:8: error: redefinition of ‘double R [10005]’
   42 | double R[10005];
      |        ^
foo.cc:3:12: note: ‘double R [10005]’ previously declared here
    3 | double n,f,R[10005],l=1,r,ans;
      |            ^
foo.cc:53:5: error: redefinition of ‘int main()’
   53 | int main()
      |     ^~~~
foo.cc:15:5: note: ‘int main()’ previously defined here
   15 | int main()
      |     ^~~~