Compilare: user.cpp: In function ‘void represent_tree(nod*, char*&)’: user.cpp:38:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < n->fii.size(); i++) { ^ user.cpp: In function ‘bool kmp(char*, char*)’: user.cpp:84:20: warning: value computed is not used [-Wunused-value] for (k = 0; *T; *T++) { ^ user.cpp:81:6: warning: unused variable ‘i’ [-Wunused-variable] int i, k; ^ user.cpp: In function ‘void read_tree(int)’: user.cpp:23:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:30:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ user.cpp: In function ‘void read_data()’: user.cpp:51:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp: In function ‘int main()’: user.cpp:140:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbnr.in", "rt", stdin); ^ user.cpp:141:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbnr.out", "wt", stdout); ^