Compilare: user.cpp: In function ‘int main()’: user.cpp:62:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < pts.size(); ++i) ^ user.cpp:72:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (r + msk < pts.size() && pts[r + msk].ang < t) ^ user.cpp: In function ‘char nextch()’: user.cpp:22:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, BMAX, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:47:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nori.in", "r", stdin); ^ user.cpp:48:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nori.out", "w", stdout); ^