Compilare: user.cpp: In function ‘int main()’: user.cpp:18:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[i].length()>maxLen) ^ user.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[1].length()>c) ans++; ^ user.cpp:27:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[r].length()<=c) continue; ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dictree.in","r",stdin); ^ user.cpp:13:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dictree.out","w",stdout); ^