Compilare: main.cpp: In function 'void insert(std::__cxx11::string, int)': main.cpp:47:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<w.length(); ++i) ~^~~~~~~~~~~ main.cpp: In function 'void drumuri()': main.cpp:63:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<ord.size(); ++i) ~^~~~~~~~~~~ main.cpp: In function 'void calc(trie*)': main.cpp:87:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<aux->words.size(); ++j) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:96:19: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'std::__cxx11::string* {aka std::__cxx11::basic_string<char>*}' [-Wformat=] scanf("%s", &a); ^ main.cpp:104:23: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'std::__cxx11::string* {aka std::__cxx11::basic_string<char>*}' [-Wformat=] scanf("%s", &s); ^ main.cpp:113:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<a.length(); ++i) ~^~~~~~~~~~~ main.cpp:95:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.in","r",stdin); ^ main.cpp:96:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &a); ^ main.cpp:97:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:104:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &s); ^