answer.code: In function ‘int main()’:
answer.code:185:12: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  185 |     freopen("result.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccvfKx7T.o: in function `main':
answer.code:(.text.startup+0x0): multiple definition of `main'; /tmp/cca4RI2H.o:implementer.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cca4RI2H.o: in function `main':
implementer.cpp:(.text.startup+0xcb): undefined reference to `init(int)'
/usr/bin/ld: implementer.cpp:(.text.startup+0x319): undefined reference to `send(int, int, int, int, std::vector<int, std::allocator<int> > const&)'
/usr/bin/ld: implementer.cpp:(.text.startup+0xb7a): undefined reference to `init(int)'
/usr/bin/ld: implementer.cpp:(.text.startup+0xc0f): undefined reference to `send(int, int, int, int, std::vector<int, std::allocator<int> > const&)'
collect2: error: ld returned 1 exit status