Compilare: user.cpp: In function ‘void atac()’: user.cpp:73:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < R->p.size();++i)v[R->p[i]] = R->num; ^ user.cpp: In function ‘int main()’: user.cpp:94:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(t); ++i){ ^ user.cpp:91:18: warning: unused variable ‘F’ [-Wunused-variable] Trie* R = T,*F; ^ user.cpp:80:40: 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); ^ user.cpp:81:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.out","w",stdout); ^ user.cpp:83:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n%d\n",t,&q); ^ user.cpp:87:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",ch); N = strlen(ch); ^