Compilare: main.cpp: In function 'void insert(std::__cxx11::string, int)': main.cpp:32:20: 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:48:20: 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:72:24: 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:90:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(aux2);++i) a+=aux2[i]; ~^~~~~~~~~~~~~ main.cpp:102:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<strlen(aux3);++j) ~^~~~~~~~~~~~~ main.cpp:114:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<a.length(); ++i) ~^~~~~~~~~~~ main.cpp:84:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("a.in","r",stdin); ^ main.cpp:86:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("a.out","w",stdout); ^ main.cpp:89:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",aux2); ^ main.cpp:92:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:99:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &c); ^ main.cpp:101:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",aux3); ^