Eroare de compilare: In file included from /usr/include/c++/6/cmath:45:0, from user.cpp:2: user.cpp:13:14: error: expected unqualified-id before numeric constant const double M_PI = 3.14159; ^ user.cpp: In function ‘int main()’: user.cpp:57:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v.size();i++){ ~^~~~~~~~~ user.cpp:80:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=2;i<vf.size();i++){ ~^~~~~~~~~~ user.cpp:45:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perfect2.in","r",stdin); ^ user.cpp:46:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perfect2.out","w",stdout); ^ user.cpp:48:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&cr,&n); ^ user.cpp:50:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&tx,&ty); ^