fangorn.cpp: In function 'void solve(int)':
fangorn.cpp:84:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |         for (int i = 1; i < pt.size(); i++) {
      |                         ~~^~~~~~~~~~~
fangorn.cpp: In function 'int main()':
fangorn.cpp:109:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  109 |     freopen("input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~