Compilare: user.cpp: In function ‘int main()’: user.cpp:31:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<P.size()){ ^ user.cpp:38:48: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<double>::size_type {aka unsigned int}’ [-Wformat=] printf("%ld\n%ld\n",P.size()*2,Ans.size()*2); ^ user.cpp:38:48: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘std::vector<long int>::size_type {aka unsigned int}’ [-Wformat=] user.cpp:39:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<Ans.size();i++) printf("%ld ",Ans[i]); ^ user.cpp:16:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poligon6.in","r",stdin); ^ user.cpp:17:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poligon6.out","w",stdout); ^ user.cpp:19:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ user.cpp:21:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&R); R = R*R; ^