Compilare: main.cpp: In function 'void antibfs(ac*)': main.cpp:166:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<fr->nd.size(); ++j) final[fr->nd[j]]=fr->n0; ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:178:40: 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:180:42: 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); ^ main.cpp:182:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",tx); ^ main.cpp:184:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:190:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",c); ^