Compilare: user.cpp: In function ‘int main()’: user.cpp:69:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<coor.size()-1;++i) ^ user.cpp:90:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<out.size();++i)printf("%d\n",out[i]); ^ user.cpp:52:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile.in","r",stdin); ^ user.cpp:53:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile.out","w",stdout); ^ user.cpp:54:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:65:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^