Compilare: user.cpp: In function ‘void trie_insert(Trie*, char*, int)’: user.cpp:28:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(node->sons[*s]==NULL) ^ user.cpp:29:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] node->sons[*s]=new Trie(); ^ user.cpp:30:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] trie_insert(node->sons[*s],s+1,position+1); ^ user.cpp: In function ‘int main()’: user.cpp:70:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[1000010]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:63:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rps.in","r",stdin); ^ user.cpp:64:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rps.out","w",stdout); ^ user.cpp:68:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&k,&w,&d); ^ user.cpp:70:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^