Compilare: user.cpp: In function ‘void trie_push()’: user.cpp:7:13: warning: unused variable ‘kk’ [-Wunused-variable] int u=1,kk=0; ^ user.cpp: In function ‘int main()’: user.cpp:50:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[1000100]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:44:32: 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:45:34: 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:46:34: 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:50:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^